Snapshot, Tce, Shadowimage Concurrent Capacity - Hitachi AMS2100 User Manual

SnapShot, TCE, ShadowImage concurrent capacity

Table 2-18: SnapShot Maximum Single Capacity, per Controller
Equipment Type
AMS2100
AMS2300
AMS2500
Hitachi AMS 2000 Family Copy-on-Write SnapShot User Guide
If ShadowImage is used on the same controller as SnapShot,
managed capacity for concurrent use must also be calculated and
compared to maximum supported capacity. If TCE or TrueCopy is
used also, it is included in concurrent-use calculations.
Managed concurrent-use capacity is calculated using the following
formula:
SnapShot: Maximum supported capacity value of P-VOL (TB)
= Maximum SnapShot single capacity
- (Total ShadowImage S-VOL capacity / 17)
- (Total TrueCopy P-VOL and S-VOL capacity / 17)
- (Total TCE P-VOL and S-VOL capacity x 3
SnapShot maximum single capacity is shown in
Table 2-19 on page 2-39
how closely capacity between data volumes and data pool volumes
must be managed. These tables are provided for your information.
Also, Figure 2-12 on page 2-40
data volume to data pool volume relates to maximum supported
capacity.
•
Mounted Memory
1 GB per CTL
2 GB per CTL
4 GB per CTL
1 GB per CTL
2 GB per CTL
4 GB per CTL
8 GB per CTL
2 GB per CTL
4 GB per CTL
6 GB per CTL
8 GB per CTL
10 GB per CTL
12 GB per CTL
16 GB per CTL
Planning and design
through Table 2-22 on page 2-40
shows a graph of how the ratio of
Single Maximum Supported
Capacity
Not supported
46
56
Not supported
42
116
233
30
116
163
210
280
350
420
Table 2-18.
show
Capacity (TB)
2-37