Auto Suspend; Cascaded Replication - HP 418800-B21 - StorageWorks Modular Smart Array 70 Storage Enclosure User Manual
Hp storageworks replication solutions manager 4.0.1 user guide (t3680-96308, june 2008)
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Also See for 418800-B21 - StorageWorks Modular Smart Array 70 Storage Enclosure:
- Command reference manual (207 pages) ,
- Maintenance and service manual (63 pages) ,
- User manual (60 pages)
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IMPORTANT:
After creation, HP recommends that you edit partner DR groups and change the names.
After creation, you can change the names to something logical for your environment. For example,
rename them based on their physical locations, Boston and London, or their home roles SiteA_Srce and
SiteB_Dest. Certain characters are illegal in the names. See
Auto suspend
Auto suspend specifies whether remote replication in a DR group pair is automatically suspended after a
remote link goes down. Values are:
•
Enabled. Remote replication in the DR group pair is automatically suspended after a remote
link goes down.
•
Disabled. Remote replication in the DR group pair is not automatically suspended after a remote
link goes down.
Usage guidelines:
•
Remote replication is not automatically restarted after the link becomes operational again.
IMPORTANT:
A resume command must be issued to resume remote replication.
•
Improper use of auto suspend can create and invalid source-source configuration. See
invalid DR group pair - source and
IMPORTANT:
Do not set auto suspend when the links are down
•
If not specified when creating a DR group pair, the value is set to disabled.
•
You cannot change this property when failsafe on unavailable member is enabled. See DR
groups
failsafe on unavailable
See also DR groups
Controller software versions
Implementation of this feature is controller software dependent. See
controller software features - remote
Cascaded replication
Cascaded replication refers to a replication event, and a configuration, that involves three sites (storage
systems). See the diagram blow.
The source volume (a) at site 1 is in a remote replication relationship with its copy (b) at site 2. Whenever
a point-in-time snapclone copy is needed (c) , it is created at site 2. The snapclone copy is then remotely
replicated (cascaded) to another remote copy (d) at site 3.
source.
member.
suspension
state.
replication.
illegal
characters.
, especially during an unplanned failover.
HP StorageWorks Replication Solutions Manager 4.0.1
99
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Troubleshooting
