Combining Continuous Access Xp And Auto Lun Xp - HP StorageWorks XP12000 User Manual

NOTE:
Continuous Access XP S-VOLs cannot be accessed by any UNIX/PC server host unless the pair is split.
• BC. BC volumes can be assigned to Continuous Access XP pairs, and Continuous Access XP
volumes can be assigned to BC pairs. See
information.
BC is recommended for intra-disk array copy operations. If BC is not installed, use Continuous Access
XP (Synchronous only) to copy within the same disk array. This configuration requires at least one
external fibre cable.
• Prioritized Port Control. Initiator ports in the MCU do not support the Prioritized Port/WWN
Control option.

Combining Continuous Access XP and Auto LUN XP

Auto LUN XP provides detailed information about I/O activity and hardware performance of local disk
arrays. Use Auto LUN XP to monitor local disk arrays performing Continuous Access XP operations. Use
disk array usage and performance data that Auto LUN XP collects and displays to:
• Identify optimum times to perform Continuous Access XP data duplexing operations (for example,
during periods of light system I/O activity)
• Determine the best locations for Continuous Access XP S-VOLs (for example, in parity groups with
less frequently accessed volumes to avoid bottlenecks of backend activity)
• Monitor subsystem performance during Continuous Access XP operations and testing activities
Auto LUN XP data collection does not affect disk array operations in any way. However, Auto LUN XP
data collection can cause a significant amount of traffic on a local disk array's internal LAN, especially
when Auto LUN XP collects large volumes of LDEV data. To prevent timeouts from occurring during
Continuous Access XP (or other) operations on the Command View XP management station or XP Remote
Web Console, decrease the Auto LUN XP data collection activities before using Continuous Access XP.
This reduces traffic on the local disk array's internal LAN, so inquiries and commands that the Command
View XP management station or XP Remote Web Console issues are processed more quickly.
For more information about Auto LUN XP, see the HP StorageWorks Auto LUN XP user guide for the
XP12000/XP10000.
To perform Continuous Access XP (or other) operations while Auto LUN XP is collecting data for one or
more disk arrays on the same local disk array's internal LAN:
1.
If Auto LUN XP is collecting large volumes of LDEV data, consider disabling Auto LUN XP LDEV data
collection for one or more disk arrays before using Command View XP or XP Remote Web Console.
See the HP StorageWorks Auto LUN XP user guide for the XP12000/XP10000 for instructions.
2. If Auto LUN XP is collecting data for more than three disk arrays on the local disk array's internal
LAN, consider disconnecting Auto LUN XP from one or more disk arrays before using Command
View XP or XP Remote Web Console. See the HP StorageWorks Auto LUN XP user guide for the
XP12000/XP10000 for instructions.
3.
After you disable LDEV data collection and/or disconnected Auto LUN XP, you can use Command
View XP or XP Remote Web Console to connect to the disk array, launch Continuous Access XP, and
perform Continuous Access XP operations (for example, create pairs and view pair status).
4.
When you are finished performing Continuous Access XP operations, exit Continuous Access XP, and
disconnect the Command View XP or XP Remote Web Console from the disk array.
5. After you disconnect the Command View XP management station or XP Remote Web Console from
the disk array, you can re-enable Auto LUN XP data collection.
Combining Continuous Access XP and BC
Continuous Access XP user guide
for more
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