Huawei OceanStor N8500 T Series Installation Manual page 368

OceanStor N8500 Clustered NAS Storage System
Installation Guide (for T Series V100R005)
Load balance
Logical unit
Logical unit
number
Loose coupling
Low watermarks
LUN expansion
LUN format
LUN mapping
M
Maintenance
terminal
Management
network
Management
network port
Medium scanning
Member disk
Issue 02 (2015-09-22)
A method of adjusting the system, application components, and data to
averagely distribute the applied I/O or computing requests for physical
resources of the system.
The entity is located inside the SCSI object, and can execute I/O
commands. After a SCSI I/O command is sent to an object, the logic
unit inside the object executes this command. Usually, each SCSI
physical disk has one logic unit. A tape drive and array controller may
have multiple logic units that process different I/O commands. Each
logic unit inside an array controller corresponds to a virtual disk.
The SCSI identifier of the internal logical unit of a target.
A system based on messages in which the client and the remote services
do not know how the peer side is realized. The communication between
the client and the services is based on messaging architecture. As long
as the messages comply with the negotiated architecture, the realization
of the client or services can be changed as required without damaging
the peer side.
The low level of the dirty page stored in the cache. When the amount
of the dirty page in the cache reaches the low level, cache stops storing
the data in cache into disks.
The process of forming the connected LUN by connecting one LUN to
another LUN.
The preparation process of preparation for enabling LUNs. During the
process, necessary information is written to member disks where LUNs
are located.
The OceanStor storage system maps LUNs to application servers so that
the application servers can access the storage reorganization.
The computer that is connected through a serial port or management
network port and maintains the OceanStor storage system.
An entity that provides a means to transmit and process the information
related to network management.
The network port on the controller enclosure that is connected to the
maintenance terminal. It is provided for the remote maintenance
terminal. Its IP address can be modified with the change of customers'
environment.
A background program that is run by controllers and provides the
function of detecting disk errors. The medium scanning program detects
and reports errors to the event log module.
A disk in a redundant array of inexpensive disks (RAID) group in the
OceanStor storage system.
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