HP P9000 Snapshot User Guide (AV400-96394, October 2011)

Contents
1 Overview..................................................................................................6
Snapshot software....................................................................................................................6
How Snapshot works................................................................................................................6
Volume pairs — P-VOLs and V-VOLs.......................................................................................6
Data pools..........................................................................................................................7
Components............................................................................................................................8
Licenses and capacity...............................................................................................................8
Consistency groups...................................................................................................................8
Interfaces for performing Snapshot operations..............................................................................8
Remote Web Console...........................................................................................................8
RAID Manager....................................................................................................................8
Pair status................................................................................................................................8
2 Planning and design.................................................................................10
System requirements................................................................................................................10
Data pool requirements and restrictions.....................................................................................11
Planning volumes....................................................................................................................12
Planning V-VOLs, data pools...............................................................................................12
Sizing the data pool......................................................................................................12
Number of pairs.....................................................................................................................13
Calculating maximum pairs based on differential tables..........................................................13
Calculating maximum pairs based on V-VOL management area shared memory........................15
Calculate maximum pairs based on pair tables......................................................................17
Determining maximum pairs allowed on your system..............................................................17
Planning for external volumes...................................................................................................17
3 Sharing Snapshot volumes.........................................................................19
Interoperability with other products and functions........................................................................19
Data Retention.......................................................................................................................19
Auto LUN .............................................................................................................................20
Business Copy........................................................................................................................20
Continuous Access Synchronous or Continuous Access Journal......................................................21
Thin Provisioning....................................................................................................................24
Resource Partition...................................................................................................................24
4 Installation and configuration.....................................................................25
Installing and uninstalling Snapshot..........................................................................................25
Configuration workflow...........................................................................................................25
Creating data pools................................................................................................................25
Creating V-VOLs.....................................................................................................................26
On setting up the command device...........................................................................................27
5 Pair operations.........................................................................................28
Pair operations workflow ........................................................................................................28
Checking pair status ..............................................................................................................28
Creating a pair......................................................................................................................28
Creating pairs in a consistency group...................................................................................29
Splitting a pair.......................................................................................................................29
Resynchronizing a pair............................................................................................................30
Restoring a pair......................................................................................................................30
Deleting pairs........................................................................................................................30
Deleting multiple pairs related to a port or host group.............................................................30
Deleting multiple pairs related to a pool...............................................................................31
Contents 3