| PRIMECLUSTER Global Disk Services Configuration and Administration Guide 4.1 (Solaris(TM) Operating System) |
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Contents
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| Chapter 6 Backing Up and Restoring |
This subsection describes the procedures for online backup and instant restore of local volumes and shared volumes through use of snapshots by GDS Snapshot proxy volumes.
There are two online backup methods: one uses the function as "Snapshot by Synchronization" and the other uses the function as "Instant Snapshot by OPC." By cooperation with the Advanced Copy function (EC or OPC) of the Fujitsu Storage Systems ETERNUS, or a copy function (EMC TimeFinder or EMC SRDF) of EMC's Symmetrix storage unit, backup and restore processing that does not impose the load on the server or SAN becomes possible.
The following table shows backup and restore methods and their features.
|
Operation |
Disk Unit's Copy Function |
Master Configuration (*1) |
Proxy Configuration (*1) |
Feature |
|---|---|---|---|---|
|
Backup(Sync) |
- |
single |
single |
With synchronized masters and proxies, snapshots are created simply by parting the proxies. By use of the JRM for proxies, high-speed resynchronization is executable for snapshot re-creation. Striping and concatenating masters are possible. Mirroring, striping and concatenating proxies are possible. |
|
EC |
single |
single |
With synchronized masters and proxies, snapshots are created simply by parting the proxies. By use of a disk unit's copy function, snapshot creation that does not impose the load on the server or SAN is possible. By use of a disk unit's incremental copy function, high-speed resynchronization that does not impose the load on the server or the SAN is performed for snapshot re-creation. |
|
|
OPC |
single |
single |
With synchronized masters and proxies, snapshots are created simply by parting the proxies. By use of a disk unit's copy function, snapshot creation that does not impose the load on the server or SAN is possible. |
|
|
Backup(OPC) |
OPC |
single |
single |
There is no need to synchronize masters and proxies before creating snapshots, and backups can be created any time without scheduling in advance. By use of a disk unit's copy function, snapshot creation that does not impose the load on the server or SAN is possible. |
|
Restore |
- |
single |
single |
By use of the JRM for proxies, high-speed restore is possible. Striping and concatenating masters are possible. Striping and concatenating proxies are possible. |
|
OPC |
single |
single |
By use of a disk unit's copy function, restore that does not impose the server or SAN is possible. |
(*1) In the table above, configurations indicate objects as follows.
|
Configuration |
Description |
|---|---|
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single |
This configuration means any one of the following objects. A single volume created in a single disk (excepting when using TimeFinder or SRDF) A mirror group not hierarchized, with the multiplicity of one A volume created in a mirror group not hierarchized, with the multiplicity of one (excepting when using TimeFinderor SRDF) |
|
mirror |
This configuration means either of the following objects. A mirror group not hierarchized, with the multiplicity of two and higher A mirror volume created in a mirror group not hierarchized, with the multiplicity of two and higher (excepting when using TimeFinder or SRDF) |
|
stripe |
This configuration means either of the following objects. A mirror group to which one or more stripe groups are connected A volume created in a mirror group to which one or more stripe groups are connected |
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concat |
This configuration means either of the following objects. A mirror group to which one or more concatenation groups are connected A volume created in a mirror group to which one or more concatenation groups are connected |
For details on backup and restore by cooperation with copy functions of disk units (EC, OPC, TimeFinder and SRDF), see "Snapshot Function with No Load to the Server/SAN," "Using the Advanced Copy Function in a Proxy Configuration," "Instant Snapshot by OPC" and "Using EMC TimeFinder or EMC SRDF in a Proxy Configuration."
6.4.1 Online Backup (by Synchronization)6.4.2 Online Backup (Snapshot by OPC)6.4.3 Instant Restore|
Contents
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