Using Hitachi software products, the number of pairs, migration plans, and pool capacities and virtual volumes depend on the amount of capacity of shared memory installed on the controller.
The shared memory capacity allocated by shared memory function and the cache memory capacity required for adding shard memory function vary depending on storage system models.
| Software | Items affected by shared memory capacity |
|---|---|
|
ShadowImage TrueCopy Universal Replicator global-active device |
The number of pairs that can be created. For more information, refer to the specific software user guide. |
| Volume Migration
Volume Migration V2 |
The number of migration plans that can be executed concurrently. For more information, refer to the specific software user guide. |
|
Dynamic Provisioning Dynamic Tiering active flash Thin Image Dedupe and compression |
Pool capacity and virtual volume capacity that can be created. For more information, refer to the following table related to usable capacity of pools and virtual volumes. |
|
Shared memory function |
VSP G350 |
VSP G370 |
|---|---|---|
|
Base |
0.29 PiB |
1.6 PiB |
|
Extension1 |
1.6 PiB |
4.4 PiB |
|
Extension2 |
4.4 PiB |
8.05 PiB |
|
Extension3 |
- |
- |
|
Note: When decreasing shared memory function, delete all DP, DT, active flash, TI, and dedupe and compression pools. |
||
The following table lists the corresponding amount of shared memory function to shared memory capacity:
|
Shared Memory Function |
VSP G350 |
VSP G370 |
|---|---|---|
|
Base |
34.0 GiB |
72.0 GiB |
|
Extension1 |
42.5 GiB |
94.0 GiB |
|
Extension2 |
54.5 GiB |
110.0 GiB |
|
Extension3 |
- |
- |
|
Shared Memory Function |
VSP G350 |
VSP G370 |
|---|---|---|
|
Base |
64 GiB |
128 GiB |
|
Extension1 |
128 GiB |
128 GiB |
|
Extension2 |
128 GiB |
256 GiB |
|
Extension3 |
- |
- |