Huawei OceanStor V3 Series Features Manual
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Huawei OceanStor V3 Series Features Manual

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OceanStor V3 Series
V300R006
Remote Replication Feature Guide
for Block
Issue
06
Date
2018-01-30
HUAWEI TECHNOLOGIES CO., LTD.

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Summary of Contents for Huawei OceanStor V3 Series

  • Page 1 OceanStor V3 Series V300R006 Remote Replication Feature Guide for Block Issue Date 2018-01-30 HUAWEI TECHNOLOGIES CO., LTD.
  • Page 2 Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS"...

  • Page 3: About This Document

    The symbols that may be found in this document are defined as follows. Symbol Description Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. DANGER Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 4 This issue is the fourth official release. The updates are as follows: Document description is optimized. Issue 03 (2017-08-10) This issue is the third official release. The updates are as follows: Document description is optimized. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 5 Changed Enable/Disable Protection for Secondary Resource to setting Status of Secondary Resource Protection. Optimized the description about section Impact and Restrictions. Issue 01 (2017-02-28) This issue is the first official release. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 6: Table Of Contents

    3.8 Verifying the Configuration............................68 4 Configuration Example......................72 4.1 Central Backup and Disaster Recovery........................72 4.1.1 Requirement Analysis..............................72 4.1.2 Configuration Planning..............................75 4.1.3 Configuration Operations............................82 4.1.4 Configuration Verification............................92 Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 7 Primary Storage System to the Secondary Storage System..................... 161 9.10 Do I need to stop the services on the primary storage system before performing the initial synchronization..162 Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 8 A.2 Configuration Operation (Using the LUN Copy Feature of the External Storage System)........167 A.3 Configuration Operation (Using the LUN Copy Feature of the Production and DR Centers)........169 B How to Obtain Help......................... 171 B.1 Preparations for Contacting Huawei.......................... 171 B.1.1 Collecting Troubleshooting Information.........................171 B.1.2 Making Debugging Preparations..........................172 B.2 How to Use the Document............................

  • Page 9: Feature Description

    Although some storage devices offer extremely high stability, they fail to prevent irrecoverable damage to production systems caused by natural disasters. To ensure the consistency, recoverability, and high reliability of data access, remote disaster Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 10 HyperReplication is a remote replication feature developed by Huawei. Definition The remote replication feature developed by Huawei is called HyperReplication. When a storage system runs block services, remote replication supports the following two modes: Synchronous remote replication In this mode, data is synchronized in real time to achieve full protection for data consistency and minimized data loss in the event of a disaster.

  • Page 11: License Requirements And Compatible Products

    OceanStor 18800F V100R001C00SPC200 and later OceanStor 18000 V3 series OceanStor 18500 V3/18800 V300R003C00 and later OceanStor 5000 V3 series OceanStor 5300 V3/5500 V300R001 and later V3/5600 V3/5800 V3 Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 12: Principles

    This section describes concepts related to the remote replication feature, including pair, consistency group, synchronization, splitting, primary/secondary switchover, data status and writable secondary LUN. As shown in Figure 1-1, a remote replication task is implemented in five phases. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 13 After performing an operation, view the running status of the pair to check whether the operation has succeeded. Table 1-4 describes the running status of pairs involved in a remote replication task. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 14 Synchronization can be performed for a single remote replication session or for multiple remote replication sessions in a consistency group at the same time. Synchronization of a remote replication pair involves initial synchronization and incremental synchronization. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 15 A primary/secondary switchover is a process of exchanging the roles of the primary and secondary LUNs in a pair relationship. You can perform a primary/secondary switchover for a Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 16 Link compression does not affect services running on the host and is transparent to users. Compatibility with full backup and incremental backup Link compression compresses all data that is transferred over the network regardless of upper-layer services. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 17: Data Replication

    LUN to the secondary LUN in real time. Figure 1-2 shows how a synchronous replication processes a write (N: Data block being written). Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 18 The host sends a write I/O request to the RM. The RM records the write I/O request in the LOG. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 19 LUN. Figure shows the writing process in asynchronous remote replication mode (N: Data block being written). Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 20 Data block N in the DCL. The primary LUN The secondary LUN snapshot is stopped. snapshot is stopped. RM: Remote replication management module. DCL: Data change log. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 21: Service Switchover

    The following two indicators need to be considered before a service switchover: Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 22 LUN and the secondary LUN go down. If this occurs, the administrator needs to manually change the access permission of secondary LUNs to accessible to enable a service switchover. Figure 1-4 shows how a service switchover is implemented through remote replication. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 23: Data Recovery

    And you can use the data on the secondary site to recover the primary site. Figure 1-5 shows how the storage system recovers data at the primary site after a disaster. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 24: Functions Of A Consistency Group

    LUNs. This section compares storage systems running a consistency group with storage systems not running a consistency group to show you how a consistency group ensures business continuity. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 25 Remote Replication Without Using a Consistency Group Data on LUNs not added to a consistency group is at risk for becoming unavailable, as shown Figure 1-6. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 26 LUN03 LUN03 Remote Replication Using a Consistency Group If associated LUNs are added to a consistency group, data unavailability is prevented as shown in Figure 1-7. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 27: Impact And Restrictions

    When using HyperReplication, ensure that the host operating system, multipathing software, and the remote storage system are compatible with each other. You can query the compatibility using the OceanStor Interoperability Navigator. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 28: Application Scenarios

    If a large-scale disaster central backup site. occurs at both the production center and DR center in the same city, the remote DR center can take over services and implement Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 29 Allows the central backup site to take over services when any service site (01 to n) encounters a disaster and switch services back to the service site when the site recovers. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 30 The cascaded 3DC has minor impact on the performance of the storage system in the production center and does not affect host services. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 31 If the disaster also affects the intra-city DR center (B), data in the remote DR center (C) is still available. Figure 1-11 shows the parallel 3DC configuration in synchronous + asynchronous mode. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 32 If the disaster also affects the intra-city DR center (B), data in the remote DR center (C) is still available. Figure 1-12 shows the parallel 3DC configuration in asynchronous + asynchronous mode. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 33 For the data synchronization mode used by the 3DC in asynchronous + asynchronous mode, when data is concurrently written to the production center (A), a message is displayed indicating that the synchronization succeeds. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 34 Using BCManager eReplication to Implement DR BCManager eReplication is a DR management software program specially designed for Huawei typical DR solutions. It provides a visualized and process-based platform for simple and fast operations and monitoring, with data consistency, snapshot, and remote replication supported.
  • Page 35 Agent Agent Production host BCManager DR host BCManager DR host eReplication eReplication host host Synchronous/ Asynchronous Asynchronous remote remote replication replication Storage system Storage system Storage system Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 36 Server Agent BCManager DR host eReplication host Storage system NOTE For details about how to install, deploy, and configure BCManager eReplication, see the BCManager eReplication production documentation. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 37: Planning

    This ensures isolation between host service ports and inter-array replication service ports, minimizing the impact on each other. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 38 It is recommended that the link bandwidth be greater than 10 Mbit/s (peak bandwidth/bandwidth usage), and the unidirectional transmission latency be smaller than 50 ms. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 39: Configuring Remote Replication

    Remote replication can implement data backup and disaster recovery in the scenario where a host writes data to a single or multiple independent primary LUNs. However, remote Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 40: Configuration Process

    Add a remote device Create a remote replication Verify the Configuration Note: Mandatory Optional Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 41: Preparing For The Configuration

    In an actual networking scenario, you must also consider factors such as the bandwidth, latency, network quality, and security to ensure link efficiency and stability. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 42: Checking The License File

    Active License page, apply for and import a license file as instructed in the Installation Guide of the corresponding product model. If the storage system generates an alarm indicating that the license expired, purchase and import another license file. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 43: Optional) Adding Routes

    The destination address field and the target mask field (IPv4) or prefix (IPv6) of the default route are automatically set to 0. To use this option, you only need to add a gateway. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 44: Adding A Remote Device

    A local storage device is normally connected to the remote storage device. In scenarios where a firewall is deployed, ports 36061 and 3260 must be enabled for adding a remote device. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 45 Name of the local storage device's [Example] controller connected to the remote CTE0.A storage device. Local Port Local storage device's Ethernet port [Example] connected to the remote storage CTE0.A.IMO1.P0 device. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 46 V200R002C10, or OceanStor V3 series V300R001C00 or earlier, you need to use the super administrator or administrator account on the older version remote device. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 47 Set Link Type to FC. In the Fibre Channel link list, select a Fibre Channel link. Set parameters for the Fibre Channel link. Table 3-2 lists related parameters. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 48 V200R002C10, or OceanStor V3 series V300R001C00 or earlier, you need to use the super administrator or administrator account on the older version remote device. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 49 Add Link or right-click the device and choose Add Link to add other links. Step 8 Optional: Perform the following operations based on Link Type: Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 50 You can run the show remote_device link link_type=iSCSI link_id=XXX command to query the status of this function. When the status of Fast Write Enable in the output is Yes, this function is successfully enabled. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 51: Creating A Remote Replication

    Hyper-V, Oracle and SQL Server. Optional: When Microsoft Exchange, VMware, Hyper-V, Oracle or SQL Server is selected as the primary resource type, click Select, select an application instance, and click OK. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 52 Creating Storage Resources Based on Applications in the OceanStor V3 Series V300R006 Basic Storage Service Guide for Block. For OceanStor 2000 V3 series (excluding 2600 V3 Video Surveillance Edition and 2800 V3), 5000 V3 series, and 6000 V3 series, you can configure the storage resources created based on applications.

  • Page 53: Creating A Synchronous Remote Replication (Applicable To V300R006C10)

    You can proceed as prompted. Prerequisites The remote replication license is valid. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 54 Creating Storage Resources Based on Applications in the OceanStor V3 Series V300R006 Basic Storage Service Guide for Block. For OceanStor 2000 V3 series (excluding 2600 V3 Video Surveillance Edition and 2800 V3), 5000 V3 series, and 6000 V3 series, you can configure the storage resources created based on applications.
  • Page 55 This value is applicable to scenarios where the service load is light. The speed is normally above 100 MB/s. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 56 – Automatic: The pair enters the Synchronizing state. The system will automatically synchronize the data from the primary resource to the secondary resource in the pair. (default value) Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 57 Timeout threshold that data is not [Default value] (second) written to the secondary LUN successfully. Click Next. Step 7 Optional: Add the remote replication pair to a newly created consistency group. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 58: Creating An Asynchronous Remote Replication (Applicable To V300R006C00)

    Step 1 Log in to DeviceManager. Step 2 Choose Data Protection > Remote Replication. Step 3 Click Create. The Create Remote Replication Pair Wizard dialog box is displayed. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 59 Creating Storage Resources Based on Applications in the OceanStor V3 Series V300R006 Basic Storage Service Guide for Block. For OceanStor 2000 V3 series (excluding 2600 V3 Video Surveillance Edition and 2800 V3), 5000 V3 series, and 6000 V3 series, you can configure the storage resources created based on applications.
  • Page 60 – Automatic: The pair enters the Synchronizing state. The system will automatically synchronize the data from the primary resource to the secondary resource in the pair. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 61 When the time specified in Interval has elapsed, the system automatically starts to synchronize data between the primary resource and secondary resource again. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 62 2200 V3, the resource type is LUN, the unit can only be minutes and the interval is an integer ranging from 15 to 1440 (inclusive). Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 63 Step 8 Confirm the creation of the remote replication pair. Check the remote replication pair information. If correct, click Finish. The security alert dialog box is displayed. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 64: Creating An Asynchronous Remote Replication (Applicable To V300R006C10)

    Hyper-V, Oracle and SQL Server. Optional: When Microsoft Exchange, VMware, Hyper-V, Oracle or SQL Server is selected as the primary resource type, click Select, select an application instance, and click OK. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 65 Creating Storage Resources Based on Applications in the OceanStor V3 Series V300R006 Basic Storage Service Guide for Block. For OceanStor 2000 V3 series (excluding 2600 V3 Video Surveillance Edition and 2800 V3), 5000 V3 series, and 6000 V3 series, you can configure the storage resources created based on applications.
  • Page 66 – Automatic: The pair enters the Synchronizing state. The system will automatically synchronize the data from the primary resource to the secondary resource in the pair. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 67 When the time specified in Interval has elapsed, the system automatically starts to synchronize data between the primary resource and secondary resource again. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 68 2200 V3, the resource type is LUN, the unit can only be minutes and the interval is an integer ranging from 15 to 1440 (inclusive). Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 69 Add Pairs to Remote Replication Consistency Group page will be skipped. Select Create a consistency group and add pairs to it. Set the Name and Description of consistency group. Click Next. The Summary page is displayed. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 70: Creating A Consistency Group

    (the properties are Recovery Policy, Speed, Data Transmission, Synchronization Method, and Interval). Functions of the remote replication pair are not relevant to its own properties. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 71 (.), underscores (_), and hyphens (-). l The name contains 1 to 31 characters. [Example] ConsistentGroup001 Description The description of the consistency group. None Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 72 Automatic: The consistency group enters the Synchronizing state. The system will automatically synchronize the data from the primary resource to the secondary resource. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 73 The values include: l Compression l No compression NOTE This parameter is available only when Replication Mode is set to Asynchronous. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 74 When the time specified in Interval has elapsed, the system starts to synchronize data again. NOTE This parameter is available only when Replication Mode is set to Asynchronous. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 75 Click OK. The Execution Result page is displayed. On Execution Result page, check whether the consistency group is created successfully. Click Close. ----End Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 76: Verifying The Configuration

    Select the remote replication pair to be split and choose More > Split. Click Properties. Modify Status of secondary resource protection to Read/Write to set the secondary LUN to readable and writable. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 77 After remote replication pairs are added to a consistency group, you can only perform operations on the consistency group and cannot perform operations on the pairs in the consistency group. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 78 Check whether an alarm about remote replication exists on DeviceManager at the primary and secondary sites. If yes, solve the fault based on the alarm information and repeat the previous operations. If no, contact technical support engineers. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 79 LUNs of all remote replication pairs in the consistency group to read-only. Click the consistency group to be synchronized. Choose More > Synchronize to perform the synchronization manually. ----End Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 80: Configuration Example

    Since the network is complete and the application is running properly, the carrier prefers to keep the existing network. Figure 4-1 shows a diagram of the existing network. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 81: Host Mapping

    Data at site A is automatically backed up to a backup site without interrupting services to minimize data loss upon a disaster. The backup data can be used to quickly recover services at site A after the disaster. Quick service recovery Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 82 Multiple service sites may locate in different places and are comparatively far from the backup site. Therefore, asynchronous remote replication is suitable for this case. Table 4-4 describes advantages of asynchronous remote replication. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 83: Configuration Planning

    Figure 4-2 shows a diagram of the planned network. As shown in the diagram, central backup and disaster recovery is implemented without changing the carrier's existing network. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 84 Based on the conclusion of the requirement analysis, a central disaster backup solution can meet the requirements of the carrier. Figure 4-3 shows the configuration roadmap of the solution. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 85 A. session in the storage system at site A. Note: Mandatory Optional Table 4-6 lists the configuration operations and planning items involved in the configuration example. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 86 Tier (SAS) storage pool, a disk domain needs to be created. All the disks used to create a storage pool are in the disk domain. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 87 COW for host I/Os or data synchronizati on I/Os of the secondary storage array during remote replication. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 88 B. site B This step is – 255.255.0. fundamental for setting up l Site B a logical – 172.17.20. connection between the two storage – 255.255.0. systems. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 89 The right l Password secondary username storage l The right systems for password remote data transmission. NOTE You only need to perform this step on either storage system. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 90: Configuration Operations

    The user used for communication authentication between remote devices. l If remote devices are OceanStor 18000 series V1R1C20, T series V2R2C20, or OceanStor V3 series V3R1C10 or later, you need to use the machine-machine user. The default username and password of the machine-machine user are mm_user and mm_user@storage respectively.
  • Page 91 Create a disk domain in the secondary storage system at site B. On the navigation bar of DeviceManager, click Provisioning. On the Storage Configuration and Optimization area, click Disk Domain to create DiskDomain_BK. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 92 LUNs can be created. On the navigation bar of DeviceManager, click Provisioning. On the Storage Configuration and Optimization area, click Storage Pool to create StoragePool_BK. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 93 LUN (500 GB). Otherwise the system cannot detect the created secondary LUN when you are adding a secondary LUN. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 94 Provisioning. Click Port, and click the host port whose IP address you want to change. Click Properties. On the Properties of the Port dialog box, configure the IP address of the port. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 95 After modifying host port IP address, in Ethernet Ports, select the host port for which you need to add routes. Click Route Management, and choose Add in the displayed dialog box to add route information. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 96 On the navigation bar of DeviceManager, click Data Protection and then Remote Device. Choose Add Remote Device to add a remote device following the Add Remote Device Wizard dialog box. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 97 Select the added remote device and click Add Link. Set Link Type to iSCSI and then add desired links. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 98 Step 4 Create an asynchronous remote replication. On the navigation bar of DeviceManager, click Data Protection and then Remote Replication. Choose Create to create RP_001 following the Create Remote Replication Wizard dialog box. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 99 OceanStor V3 Series Remote Replication Feature Guide for Block 4 Configuration Example The following shows the properties of the asynchronous remote replication. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 100: Configuration Verification

    Log in to DeviceManager, and choose Provisioning > LUN > LUN Group. Click Create to create LUN groups. Then add primary and secondary LUNs to corresponding LUN groups. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 101 After the synchronization is complete, log in to the application server at the primary site to check whether file Y.txt exists on the secondary LUN (after the primary/secondary switchover). – If yes, data can be recovered. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 102 Read-only to set the secondary LUN to read-only. Click the remote replication task to be synchronized. Choose More > Synchronize to perform the synchronization manually. ----End Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 103: Disaster Recovery

    Be aware that you cannot map primary and secondary LUNs to a same host; otherwise, volume label conflict may occur on the host, causing service interruption. Run services on the secondary host in the DR center. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 104 During this operation, production hosts cannot be accessed. Before performing this operation, ensure that services on the production hosts can be suspended and suspend them. Start synchronization. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 105 Check whether the remote replication pair or consistency group is in the split state. If yes, go to the next step. If no, perform the splitting before go to the next step. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 106 This operation overwrites data in the production center using data in the DR center. Before performing this operation, ensure that data in the production center can be overwritten. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 107 Manually start incremental synchronization to copy data from the DR storage system to the production storage system and ensure data consistency between the storage systems. Perform the splitting. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 108 After the switchover: the production center is the primary site and the DR center is the secondary site. 10. Set the secondary resource protection status to read-only. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 109 NOTE Data is synchronized from the production center to the DR center. After synchronization, pair running status returns to normal. 12. Run services on the production host. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 110: Managing Remote Replication

    This operation is used to complete switchover of local LUN owning controllers to ensure that primary and secondary LUNs belong to the same controller, preventing I/O forwarding. 6.7 Synchronizing Remote Status Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 111: Viewing Information Of Remote Replication Pairs

    ID of a remote resource. Remote Device Name Name of a remote device. Remote Device SN SN of a remote device. Pair ID ID of a remote replication pair. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 112 Time required for synchronization to complete. Synchronization NOTE This parameter is not supported in V300R006C00. Consistency Group Name of the owning consistency group of the remote replication pair. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 113 Consistent. l Consistent: data status of the primary resource. In normal states, it is Consistent. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 114 If the status displays as Invalid, indicating data compression transmission is not available or data compression transmission is not selected for the remote replication. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 115 When the time specified in Interval has elapsed, the system starts to synchronize data again. NOTE This parameter is available only when Replication Mode is set to Asynchronous. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 116: Modifying The Properties Of A Remote Replication Pair

    6.2 Modifying the Properties of a Remote Replication Pair This operation enables you to change the synchronization type, speed, and recovery policy of a remote replication pair. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 117 Pair Running Status is Interrupted (link down), Secondary Resource Data Status is Consistent. In this condition, the status can only be set in the secondary storage system. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 118 2200 V3, the resource type is LUN, the unit can only be minutes and the interval is an integer ranging from 15 to 1440 (inclusive). Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 119 Automatic: The system will automatically synchronize data from the primary resource to the secondary resource. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 120 LUN is selected. Step 5 Confirm the remote replication pair modification. Click OK. The Execution Result dialog box is displayed, indicating that the operation succeeded. Click Close. ----End Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 121: Synchronizing A Remote Replication Pair

    Step 4 Confirm the remote replication synchronization. Confirm the information in the dialog box. Select I have read and understand the consequences associated with performing this operation. and click OK. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 122: Splitting A Remote Replication Pair

    If the remote replication pair does not complete the initial synchronization, splitting the remote replication pair will cause data on the secondary resource unavailable. Perform this operation with caution. Procedure Step 1 Log in to DeviceManager. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 123: Performing A Primary/Secondary Switchover For A Remote Replication

    Remote Replication > Remote Replication Pair. Step 3 Right-click the remote replication you want to perform the switchover and choose Primary/ Secondary Switchover. The security alert dialog box is displayed. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 124: Switching Local Lun Owning Controllers

    Prerequisites The connection between the local storage system and remote storage system is normal. A remote replication pair is created. Procedure Step 1 Log in to DeviceManager. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 125: Deleting A Remote Replication Pair

    In this way, the remote replication pair can be deleted. Remote replication configuration is automatically generated in the primary and secondary resources when the remote replication pair is created. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 126 Confirm the information in the dialog box. Select I have read and understand the consequences associated with performing this operation. and click OK. The Execution Result dialog box is displayed. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 127: Viewing Remote Replication Performance Indicators

    Longest synchronization duration during the sampling interval Duration (s) NOTE The following procedure uses V300R003C20 as an example. Procedure Step 1 Log in to DeviceManager. Step 2 Choose Monitor > Performance Monitoring. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 128 In the Monitored Object dialog box, select remote replication for Object Type and select the remote replication pair that you want to monitor. In this case, select LUN Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 129 When you move the mouse pointer over a performance data sampling point in the graph, the corresponding sampling value and time are displayed. Figure 6-2 Viewing real-time performance monitoring data (multi-figure display) ----End Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 130: Managing Consistency Groups

    7.7 Disabling Protection For Secondary Resource Of Consistency Groups This operation disables protection for secondary resource of all remote replication in consistency group, and the data of secondary resource can be written again. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 131: Viewing Consistency Group Information

    Step 3 View basic information about existing consistency groups. Table 7-1 describes the related parameters. Table 7-1 Parameters of Consistency Group Parameter Description Name Name of a consistency group. ID of a consistency group. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 132 You must delete the consistency group on both primary and secondary storage devices. Otherwise, the consistency group creation may fail. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 133 Automatic: The consistency group enters the Synchronizing state. The system will automatically synchronize the data from the primary resource to the secondary resource. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 134 This value is applicable to scenarios where the service load is light. The speed is normally above 100 MB/s. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 135 The values include: l Compression l No compression NOTE This parameter is available when Replication Mode is set to Asynchronous. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 136 ID of a remote resource. Remote Device Name Name of the remote device. Remote Device SN Serial No. of the remote device. Pair ID ID of the remote replication pair. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 137 Time required for synchronization to complete. NOTE This parameter is not supported in V300R006C00. Remote Replication Consistency Group Name of the owning consistency group of the remote replication. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 138 Automatic: The remote replication pair enters the Synchronizing state. The system will automatically synchronize the incremental data from the primary resources to the secondary resources in the remote replication. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 139 You can synchronize the data to ensure data consistency between the primary resource and secondary resource. NOTE Synchronized is only applied for synchronous remote replication. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 140: Changing The Properties Of A Consistency Group

    ----End 7.2 Changing the Properties of a Consistency Group This operation enables you to change the name, description, recovery policy and rate of a consistency group. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 141 (.), underscores (_), and hyphens (-). l The name contains 1 to 31 characters. [Example] ConsistentGroup001 Description Description of a consistency group. [Example] None Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 142 59 (seconds) This parameter is available only when Synchronization Method is set to Timed wait after [Example] synchronization begins or Timed wait after 50 minutes synchronization ends. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 143 The values include: l Compression l No compression NOTE This parameter is available when Replication Mode is set to Asynchronous. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 144: Synchronizing A Consistency Group

    Consistency Group Synchronous Remote Asynchronous Remote Replications in a Replications in a Consistency Group Consistency Group Normal × √ Split √ √ Interrupted (Link down) × × Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 145: Splitting A Consistency Group

    LUN in each pair, facilitating report generation, test, data mining, decision making, and data recovery. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 146 OK to confirm the information. Click OK. The Success dialog box is displayed indicating that the operation is successful. Click OK. ----End Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 147: Performing Primary/Secondary Switchover Of A Consistency Group

    Consistent × × To be recovered Inconsistent × × Invalid Any status × × Synchronizing Any status × × √: Able to operate. ×: Unable to operate. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 148: Enabling Protection For Secondary Resource Of Consistency Groups

    Interrupted (Link up) Any status × To be recovered Any status × Synchronizing Any status × Invalid Any status × √: Able to operate. ×: Unable to operate. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 149: Disabling Protection For Secondary Resource Of Consistency Groups

    Interrupted (Link up) Any status × To be recovered Any status × Synchronizing Any status × Invalid Any status × √: Able to operate. ×: Unable to operate. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 150: Adding A Remote Replication Pair

    (the properties are Recovery Policy, Speed, Data Transmission, Synchronization Method, and Interval), and is not relevant to the properties of the remote replication pair. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 151: Removing A Remote Replication Pair

    Step 3 Right-click a consistency group from which you want to remove a remote replication pair and choose Remove Remote Replication Pair The Remove Remote Replication Pair dialog box is displayed. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 152: Deleting A Consistency Group

    If the link has failed, you must forcibly delete consistency groups from the local and remote devices. After a consistency group is deleted, you cannot centrally manage the remote replication pairs within the group. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 153 OK to confirm the information. The Success dialog box is displayed indicating that the operation is successful. Click OK to complete deleting the consistency group. ----End Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 154: Managing Remote Devices

    Step 1 Log in to DeviceManager. Step 2 Choose Data Protection > Remote Device. Step 3 View basic information about existing remote storage devices. Table 8-1 lists related parameters. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 155 Table 8-2 Information about FC links of the remote storage devices Parameter Description Setting Link ID ID of a remote link. [Example] Health Status Health status of a remote [Example] link. Normal Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 156 Link ID ID of a remote link. [Example] Health Status Health status of a remote [Example] link. Normal Running Status Operating status of a remote [Example] link. Connected Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 157: Modifying Remote Device Information

    The Modify dialog box is displayed. Step 4 Modify information of the remote device. Modify the authentication information, and enter the username and password of the remote device. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 158 V200R002C10, or OceanStor V3 remote device. series V300R001C00 or earlier, you need to use the super administrator or administrator account on the older version remote device. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 159 – The password of the super administrator or administrator account is consistent with the password on the remote device. Modify the data compression policy. Table 8-5 describes related parameters. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 160: Modifying The Advanced Properties Of A Remote Link

    The remote link can be a Fibre Channel link or an iSCSI link. Procedure Step 1 Log in to DeviceManager. Step 2 Choose Data Protection > Remote Device. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 161: Deleting A Remote Link

    There is a remote storage device that has more than one link. Procedure Step 1 Log in to DeviceManager. Step 2 Choose Data Protection > Remote Device. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 162: Removing A Remote Device

    Step 3 Select the remote device you want to remove and click Remove on the menu bar. You can also right-click the remote device that you want remove, and choose Remove. The security alert dialog box is displayed. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 163 Confirm the information in the dialog box and select I have read and understand the consequences associated with performing this operation. Click OK. The Success message box is displayed, indicating that the operation succeeded. Click OK. ----End Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 164: Faqs

    Bandwidth Are Not the Same in Asynchronous Remote Replication 9.14 What Can I Do If the Remote Connection Fails to Be Created with the TOE Interface Module Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 165: What Are The Differences Between Synchronous Remote Replication And Asynchronous Remote Replication

    Therefore, asynchronous remote replication applies to disaster recovery scenarios where the primary device and the secondary device are far from each other or network bandwidth is limited. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 166: How Do I Use The Secondary Lun In A Remote Replication Task

    In this case, you can refresh the information manually or log in to the DeviceManager again. Then, the name of the primary device will be updated. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 167: What Is The Relationship Among A Remote Replication Task, Clone, And Consistency Group

    If the workload in the system is heavy, the bandwidth for remote replication and LUN copy among storage arrays can be reduced to guarantee the normal running of ongoing services. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 168: Precautions For Creating A Remote Link

    Amount of data written into the primary LUN when data is replicated from the primary LUN to the secondary LUN = 1200 x 5 = 6000 MB Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 169: Impact Of Modifying Consistency Group Properties

    However, if you are absolutely sure that the two sets of data are exactly the same, you can skip this operation. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 170: Do I Need To Stop The Services On The Primary Storage System Before Performing The Initial Synchronization

    File remote replication and block remote replication use the same license. After purchasing and importing a remote replication license file, you can create both file and block remote replications. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 171: How Can I Solve The Problem If The Logical Bandwidth And The Replication Link Bandwidth Are Not The Same In Asynchronous Remote Replication

    When a remote device whose type is Replication is added, or the iSCSI link is added to the remote device, if error code 1073804034 occurs or the connection fails to be created, the Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 172: Will Synchronization Be Interrupted When Long Latency Occurs On The Links To The Two Ends Of Synchronous Remote Replication

    The synchronous remote replication will enter the interrupted state in this situation. At this moment, data can be read from and written to the primary LUN, and differences between primary and secondary LUNs are recorded. The latency threshold is 10s. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 173: Why The Secondary Lun Is Not Displayed When The Remote Replication Pair Is Created

    Locate and rectify the cause. If the secondary LUN is still not displayed when the remote replication pair is created, contact technical support engineers. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 174: A Using The External Storage System To Perform Initial Synchronization For A Remote Replication

    NOTICE This section is intended for Huawei technical engineers. Use this method only under the guidance of Huawei technical engineers. If you want to use this method to perform initial synchronization, contact Huawei technical support engineers for help. A.1 Introduction...

  • Page 175: Configuration Operation (Using The Lun Copy Feature Of The External Storage System)

    Prerequisites The production center and the DR center have network established, remote storage systems configured, and the primary and secondary LUNs created. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 176 The external storage system is in the production center and connected to the storage system of the production center. The remote storage system has been configured in the production center. The external storage system is a Huawei product and supports the LUN copy feature. The production center supports the snapshot feature. Procedure Step 1 Configure the remote replication from the production center to the DR center.

  • Page 177: Configuration Operation (Using The Lun Copy Feature Of The Production And Dr Centers)

    The remote storage system has been configured in the production center. The external storage system is a Huawei product. The production center supports the snapshot feature and both the production center and the DR center support the LUN copy feature.
  • Page 178 Ensure that the remote replication secondary LUN is in the Read-only state during LUN copy and LUN copy configuration. Delete the full LUN copy. Step 5 Start the remote replication from the production center to the DR center. ----End Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 179: B How To Obtain Help

    Huawei. B.2 How to Use the Document Huawei provides guide documents shipped with the device. The guide documents can be used to handle the common problems occurring in daily maintenance or troubleshooting. B.3 How to Obtain Help from Website...

  • Page 180: Making Debugging Preparations

    Troubleshooting level and required solution deadline B.1.2 Making Debugging Preparations When you contact Huawei for help, the technical support engineer of Huawei might assist you to do certain operations to collect information about the fault or rectify the fault directly.

  • Page 181: C Glossary

    In the search field, enter product model, and select a path from the paths that are automatically displayed to go to the document page of the product. Browse or download the OceanStor V3 Series V300R006 Glossary. Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright ©...

  • Page 182: D Acronyms And Abbreviations

    Data Change Log Fiber Channel Internet Protocol IPv4 Internet Protocol version 4 IPv6 Internet Protocol version 6 iSCSI Qualified Name iSCSI Internet Small Computer Systems Interface Logical Unit Number Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 183 Serial Attached SCSI Serial Number Transmission Control Protocol Three Data Center Universal Time Coordinated VVol Virtual Volume Wide Area Network WWPN World Wide Port Name World Wide Name Issue 06 (2018-01-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

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