Monitoring Data Pool Usage; Expanding Data Pool Capacity; Other Methods For Lowering Data Pool Load - Hitachi AMS2100 User Manual

Monitoring data pool usage

NOTE: Threshold is set by the user during data pool setup. It is a
percentage of the data pool that, when reached, indicates that maximum
capacity is close to being reached. The default Threshold level is 70%.

Expanding data pool capacity

Other methods for lowering data pool load

7-4
Hitachi AMS 2000 Family Copy-on-Write SnapShot User Guide
The SnapShot data pool must have sufficient capacity to handle the
write workload demands placed on it. You can monitor data pool
usage by locating the desired data pool and reviewing the percentage
of the data pool that is being used.
Prerequisites
• Data pool that is large enough to handle workload
• Monitor status and data pool usage
To monitor data pool usage level
1. In Navigator 2 GUI, select the desired array, then click the Show
& Configure Array button.
2. From the Replication tree, select the Local Replication icon,
then select the Setup icon. The Setup screen displays.
3. Select Data Pools. The Data Pools screen displays.
4. Locate the desired data pool and review the % Used column.
This shows the percentage of the data pool that is being used.
Click the Refresh Information button to make sure the data is
current.
If usage reaches the threshold level or is close to it on a regular
basis, the data pool should be expanded, and/or the lifespan and
number of V-VOLs reduced.
•
When monitoring indicates that the data pool is in danger of filling
up, you can add new volumes to expand its size.
To expand data pool capacity
The array allows a maximum of 128 volumes for data pools. One data
pool may consist of up to 64 volumes.
1. Split the pair associated with a data pool that is to be expanded.
For instructions, see
2. Add a volume or volumes to the data pool.
When a data pool is in danger of exceeding its capacity, the following
actions can be taken as alternatives or in addition to expanding the
data pool:
• Delete one or more V-VOLs. With fewer V-VOLs, less data
accumulates in the data pool.
Monitoring and maintenance
Updating the V-VOL on page 6-5.