Performance Monitor - HP StorageWorks P9000 User Manual

Table 23 Status, availability of Data Retention operation
Cnt Ac-J
volume
P-VOL
S-VOL
*Note: If the Write option is set to the S-VOL, the access attribute can be changed.
Table 24 Possible changes to access attribute when Continuous Access Journal P-VOL status is PAIR
or COPY
Access attribute
-
Read/Write
Read Only
Protect
S-VOL Disable

Performance Monitor

Performance Monitor software provides detailed information on I/O activity and hardware
performance in P9500 systems. Storage system usage and the performance data that is collected
and displayed by Performance Monitor enables you to:
Identify the optimum timing for performing Continuous Access Journal copy operations.
Determine the best locations for the Continuous Access Journal S-VOLs (for example; parity
groups with less frequently accessed volumes to avoid bottlenecks of back-end activity)
Monitor storage system performance during Continuous Access Journal operations and during
testing activities.
Use the following procedure to lessen the impact on Continuous Access Journal operations while
Performance Monitor is collecting data for one or more storage systems on the same P9500 internal
LAN:
1. If Performance Monitor is collecting high amounts of LDEV data, disabling this activity, if
possible, for one or more storage systems.
2. If Performance Monitor is collecting data for more than three storage systems on the P9500
internal LAN, disconnect Performance Monitor, if possible, from one or more storage systems
before using Continuous Access Journal.
3. After you have disabled LDEV data collection and/or disconnected Performance Monitor
wherever possible, then connect to the storage system using Remote Web Console and launch
Continuous Access Journal.
Pair status Changing access attribute
SMPL Yes
COPY See next table.
PAIR See next table.
PSUS Yes
PSUE Yes
SMPL Yes
COPY No
PAIR No
PSUS No*
PSUE No
Continuous Access Journal P-VOL status of PAIR or COPY
Read/Write
-
Yes
Yes
Yes
Read Only Protect
No No
- Yes
Yes -
No No
Referencing access attribute
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
S-VOL Disable
Yes
Yes
Yes
-
Performance Monitor 133