HP XP P9500 Storage - Manual (Page 3)

Contents
1 Overview of Fast Snap................................................................................6
Fast Snap................................................................................................................................6
Components of Fast Snap..........................................................................................................7
Components of volumes........................................................................................................8
Consistency groups..............................................................................................................8
Snapshot groups..................................................................................................................8
Fast Snap...........................................................................................................................8
Thin Provisioning..................................................................................................................8
RAID Manager....................................................................................................................9
How Fast Snap works................................................................................................................9
Fast Snap Pools...................................................................................................................9
V-VOLs.............................................................................................................................10
Releasing V-VOL definitions............................................................................................10
Fast Snap pairs..................................................................................................................10
Storing snapshot data for a group workflow..........................................................................10
Snapshot data storage methods...........................................................................................12
Differences in methods for storing snapshots depending on volumes.....................................13
CAW storage method workflow......................................................................................13
COW storage method workflow......................................................................................13
Restoring Fast Snap pairs....................................................................................................13
FS pair status and deleting snapshot data.............................................................................14
Deleting Fast Snap pairs.....................................................................................................14
Pair status..............................................................................................................................14
Copy threshold option.............................................................................................................16
Interoperability with other software applications..........................................................................17
Data Retention...................................................................................................................18
Auto LUN..........................................................................................................................19
Business Copy...................................................................................................................19
Continuous Access Synchronous and Continuous Access Journal..............................................21
Using Fast Snap in a 3DC multi-target configuration..........................................................23
Thin Provisioning................................................................................................................24
Resource Partition...............................................................................................................25
About acronyms and abbreviations for software applications........................................................25
2 Planning and design.................................................................................26
System requirements................................................................................................................26
Requirements for Fast Snap.................................................................................................26
Installing Fast Snap workflow..........................................................................................26
The workflow for removing Fast Snap...............................................................................26
Requirements for licensed capacity.......................................................................................26
Fast Snap shared memory requirements................................................................................27
Removing shared memory...................................................................................................27
Fast Snap volume requirements............................................................................................27
Requirements for consistency groups.....................................................................................29
Requirements for snapshot groups........................................................................................30
Requirements for Fast Snap tasks..............................................................................................30
Calculating the number of virtual volumes that the storage system can create.............................30
Calculating the number of Fast Snap pairs............................................................................30
Calculating the maximum number of pairs based on differential tables.................................31
Calculating the number of Fast Snap pairs based on pair tables..........................................31
Calculating the number of Fast Snap pairs based on the snapshot estimated manageable
capacity......................................................................................................................32
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