Table Of Contents - HP StorageWorks P9000 User Manual

Contents
1 Continuous Access Journal Z overview ..........................................................8
Continuous Access Journal Z software ........................................................................................8
How Continuous Access Journal Z works.....................................................................................8
Hardware and software components...........................................................................................9
P9500 storage systems.......................................................................................................11
Main and remote control units .......................................................................................11
Pair volumes......................................................................................................................11
Journal volumes.................................................................................................................11
Journals............................................................................................................................12
Data path.........................................................................................................................12
Extended consistency groups...............................................................................................12
Remote Web Console ........................................................................................................13
Business Continuity Manager..............................................................................................13
Overview of copy operations...................................................................................................13
Initial copy operation.........................................................................................................13
Update copy operation ......................................................................................................14
Read and Write I/O operations during remote copy operation.....................................................15
S-VOL write option..................................................................................................................15
S-VOL read option..................................................................................................................15
Difference management...........................................................................................................16
Pair status..............................................................................................................................16
2 Requirements and specifications.................................................................17
System requirements................................................................................................................17
Business Continuity Manager specifications ...............................................................................19
Command device ..................................................................................................................21
3 Planning volumes, systems.........................................................................23
Plan and design workflow .......................................................................................................23
Assessing business requirements for data recovery......................................................................23
Determining your RPO........................................................................................................24
Write-workload......................................................................................................................24
Measuring write-workload...................................................................................................24
Sizing journal volumes............................................................................................................25
Determine the required journal volume capacity.....................................................................25
Calculating the journal size.................................................................................................26
Planning journals...............................................................................................................26
Data transfer speed considerations...........................................................................................27
RAID group configuration....................................................................................................27
Fibre Channel port configuration..........................................................................................27
Planning journal volumes.........................................................................................................27
Host I/O time stamp..........................................................................................................28
Planning pair volumes.............................................................................................................28
Data and journal volume specifications.................................................................................28
Duplicating VOLSERs..........................................................................................................29
Maximum number of pairs allowed .....................................................................................30
Calculating maximum number of pairs.............................................................................30
Priority set for initial copy operations and scheduling order.....................................................31
Disaster recovery considerations ..............................................................................................33
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