Data Pool Key Points - Hitachi AMS 2000 User Manual

4. It is also recommended that annual increases in data transactions be
factored into data pool sizing. This is done to minimize reconfiguration
in the future. Do this by multiplying the pool size with safety factor by
the percentage of expected annual growth. For example:
635,040 MB x 1.2 (20 percent growth rate for per year)
= 762,048 MB
Repeat this step for each year the solution will be in place.
5. Convert to gigabytes, dividing by 1,000. For example:
762,048 MB / 1,000 = 762 GB
This is the size of the example data pool with safety and growth (2nd
year) factored in.

Data pool key points

• Data pools must be set up on the local array and the remote array.
• The data pool must be on the same controller as the P-VOL and V-
VOL(s).
• Up to 64 LUs can be assigned to a data pool.
• Plan for highest workload and multi-year growth.
• For set up information, see
Hitachi AMS 2000 Family TrueCopy Extended Distance User Guide
Plan and design — sizing data pools and bandwidth
Setting up data pools on page 6-12.
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