HP XP P9000 Business Copy User Guide (AV400-96573, July 2013)
Table Of Contents
- HP XP P9000 Business Copy User Guide
- Contents
- 1 Business Copy overview
- 2 Requirements and planning
- 3 Sharing Business Copy volumes
- Cache Residency
- Fast Snap and Snapshot
- Data Retention
- Thin Provisioning and Smart Tiers
- External Storage Access Manager
- LUN Manager
- Open Volume Management
- Resource Partition
- Continuous Access Synchronous
- Continuous Access Journal
- External Storage
- Auto LUN
- 4 Performing configuration operations
- 5 Performing pair operations
- 6 Monitoring and maintaining the system
- 7 Troubleshooting
- 8 Support and other resources
- A Interface support for BC operations and options
- B Business Copy GUI reference
- Replications window
- Local Replications window
- View Pair Properties window
- View Pair Synchronous Rate window
- View Histories window
- Consistency Group Properties window
- Create Pairs wizard
- Split Pairs wizard
- Resync Pairs wizard
- Suspend Pairs window
- Delete Pairs window
- Edit Mirror Units dialog box
- Change Options dialog box
- Add Reserve Volumes Wizard
- Remove Reserve Volumes window
- Edit Local Replica Option wizard
- C Configuration operations (secondary window)
- D Pair operations (secondary window)
- E Monitoring and maintaining the system (secondary window)
- F Business Copy GUI reference (secondary window)
- Glossary
- Index
Related information
• “Removing reserve attribute from a volume” (page 59)
System options that affect performance
You can enable and disable the following options that affect performance. (To go directly to the
procedure, see “Setting performance options” (page 39)).
• Swap&Freeze. Alters the behavior of the quick restore operation. With Swap&Freeze, update
copy operations are suppressed when the quick restore is completed and the pair is in PAIR
status. Differential data is not copied to the new S-VOL. Use the Swap&Freeze option when
you want to keep S-VOLs unchanged after the quick restore operation.
• Host I/O Performance. Increases I/O performance while suppressing copy processing.
However, be aware that enabling this option results in a longer copy time, slowing copy
processing.
• Copy Threshold. Temporarily stops copy operations when the workload on the storage system
is heavy. This is done to minimize degradation to host I/O performance during peak periods.
The option performs only when workload is heavy; the Host I/O Performance option suppresses
copy operations at all times regardless of workload level.
When the Copy Threshold Option is enabled, it is effective for all of the following software:
◦ BC
◦ BC Z
◦ Compatible FlashCopy
◦ FS
◦ SS
◦ Auto LUN
NOTE: Your service representative must enable the Copy Threshold option.
• Copy Pace options. Reduce the effect on host server I/O performance by suppressing copy
processing in PAIR status. The system uses this option when pairs are in PAIR status only. This
option does not have an effect if the pair is in other statuses.
You can choose from three levels of processing-suppression/performance-improvement:
◦ Copy Pace Ext. None (usable since program version 70-03-01-xx/xx). This is the most
effective option—stops copy processing.
NOTE: With this option, synchronization when a pair is split tends to be slower, which
prolongs the time that the pair is in process of Quick Split (PSUS(SP)/PSUS status) or in
the process of Steady Split (COPY(SP)/COPY status). If this poses a problem, complete
one of the following:
– Minimize the time that the pair is in PAIR status so that synchronization at the pair
split does not require so much time.
– Use one of the other Copy Pace options.
◦ Copy Pace Ext. Slower2—2nd most effective
◦ Copy Pace Ext. Slower1—3rd most effective
38 Performing configuration operations