Round Robin Replicas (Wizard); Snapclones (Host Volume) - HP 418800-B21 - StorageWorks Modular Smart Array 70 Storage Enclosure User Manual

the instant restore wizard is used, the wizard checks the repository to find relevant replicas to restore
from. At a low level, the replica repository contains a large amount of technical information. Summary
information is displayed in the Replica Repository tab and in the Replica Repository Properties window.
Use of the replica repository
Generally, you do not need to directly perform actions on replicas. The replication manager automatically
uses the replica repository for many functions. When necessary, you can view, edit, and delete replicas
in the repository. You can also remove replicas from round robin rotation.
Replica names
The wizard assigns replica names based on the date and time when the replication is performed. Names
begin with RR (replica repository) and use the format.
Replica name format
RR-YYYYMMDD.HHMMSS.SSS
YYYY=year, MM=month, DD=day,
HH=hours, MM=minutes, SS.SSS=seconds
To determine if a replica was made in the AM or PM you can view its properties. See
viewing host volume properties
Replica types
The replicas in the repository are classified by type. Values for the replica type property are:
• Round robin. Indicates the replica is part of a round robin rotation (rolling backup).
• Instant Restore. Indicates the replica is not part of a round robin rotation (rolling backup).
Has-replica property
The has-replica property (in the Replica Repository Properties window) indicates if a replica is logically
complete. For example, if one or more virtual disk underlie a host volume replica and one or more virtual
disks are deleted, the replica will still appear in the repository, but when its properties are viewed, the
has-replica property will be set to no. This property is used in the Instant Restore wizard to ensure that
you cannot accidently restore from a logically incomplete replica.

Round robin replicas (wizard)

Round robin refers to repeatedly creating replicas of a host volume in a way that reuses the underlying
virtual disk resources. This reduces resource consumption and simplifies replica management. A local
replication wizard allows you to set up round robin replication. See
For example, say that you use the wizard to create and save a round robin job that maintains three
replicas of a host volume. The first three times that you run a job instance, a new replica will be created
and added to the wizard's replica repository; and, each replica will have its own underlying virtual disks.
When you run the four times or more, the oldest replica will be deleted from the repository and a new
replica added. However, no additional underlying virtual disks will required for the new replica.

Snapclones (host volume)

Snapclone replication of a host volume instantly creates independent point-in-time copies of the virtual
disks that underlie a host volume. The copies are called snapclones.
The snapclone property indicates whether the host volume can be locally replicated using the snapclone
method. Values are:
150
Host volumes
Example
RR-20070414.012616.753
2007, 04, 14
01, 26, 16.753
(replicas).
creating round robin replicas.