HP Surestore E Disk Array XP256 HP XP P9000 External Storage Access Manager Us - Page 19

Cache Residency, Performance Monitor, LUN Manager, Open Volume Management, LUN Expansion

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Cache Residency With Cache Residency, you can improve data access performance by storing the ESAM data in the storage system's cache memory. Performance Monitor • Performance Monitor is used to monitor usage or performance of the storage system. You can also show statistical I/O data of ESAM and Continuous Access Synchronous pairs. • When Performance Monitor data collection results in a large amount of data, significant traffic on the P9500 internal LAN can occur. To prevent time-outs while performing ESAM operations on the RWC computer, cancel Performance Monitor data collection activities. LUN Manager LU paths cannot be deleted after you create ESAM pairs. To delete the LU path, you need to release the ESAM pair first. Open Volume Management • Customized Volume volumes can be assigned to ESAM pairs, provided that the S-VOL has the same capacity as the P-VOL. • To perform Customized Volume operations on an existing ESAM P-VOL or S-VOL, the pair must be released first to return the volume to the SMPL status. LUN Expansion LUSE volumes can be assigned to ESAM pairs, provided that both P-VOL and S-VOL are LUSE volumes consisting of the same number of LDEVs, the same size, and the same structure. Configurations with Business Copy volumes You can use the ESAM S-VOL as a Business Copy P-VOL. This configuration benefits the ESAM pair if the P-VOL is logically destroyed. In this case, you can recover the data from the split Business Copy S-VOL. Configuring ESAM with Business Copy You perform this configuration by creating an ESAM pair, a Business Copy pair, then splitting the Business Copy pair. 1. Create the ESAM pair. Make sure that pair status becomes PAIR. 2. Create the Business Copy pair, using the ESAM S-VOL as a Business Copy P-VOL. 3. Split the Business Copy pair and resume host operations on the ESAM P-VOL. Sharing volumes with other HP software products 19

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Cache Residency
With Cache Residency, you can improve data access performance by storing the ESAM data in
the storage system's cache memory.
Performance Monitor
•
Performance Monitor is used to monitor usage or performance of the storage system. You can
also show statistical I/O data of ESAM and Continuous Access Synchronous pairs.
•
When Performance Monitor data collection results in a large amount of data, significant traffic
on the P9500 internal LAN can occur. To prevent time-outs while performing ESAM operations
on the RWC computer, cancel Performance Monitor data collection activities.
LUN Manager
LU paths cannot be deleted after you create ESAM pairs. To delete the LU path, you need to release
the ESAM pair first.
Open Volume Management
•
Customized Volume volumes can be assigned to ESAM pairs, provided that the S-VOL has
the same capacity as the P-VOL.
•
To perform Customized Volume operations on an existing ESAM P-VOL or S-VOL, the pair
must be released first to return the volume to the SMPL status.
LUN Expansion
LUSE volumes can be assigned to ESAM pairs, provided that both P-VOL and S-VOL are LUSE
volumes consisting of the same number of LDEVs, the same size, and the same structure.
Configurations with Business Copy volumes
You can use the ESAM S-VOL as a Business Copy P-VOL. This configuration benefits the ESAM
pair if the P-VOL is logically destroyed. In this case, you can recover the data from the split Business
Copy S-VOL.
Configuring ESAM with Business Copy
You perform this configuration by creating an ESAM pair, a Business Copy pair, then splitting the
Business Copy pair.
1.
Create the ESAM pair. Make sure that pair status becomes PAIR.
2.
Create the Business Copy pair, using the ESAM S-VOL as a Business Copy P-VOL.
3.
Split the Business Copy pair and resume host operations on the ESAM P-VOL.
Sharing volumes with other HP software products
19