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Chapter 8 Advanced Copy Management
8.2 Functions in the Action Area for Advanced Copy
ETERNUS Web GUI User’s Guide
Copyright 2013 FUJITSU LIMITED P2X0-1090-10ENZ0
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● The table size for EC/REC and for OPC/QuickOPC/SnapOPC/SnapOPC+ without OPC Restoration (S1)
● The table size for OPC/QuickOPC/SnapOPC/SnapOPC+ with OPC Restoration (S2)
*1: For EC, OPC, QuickOPC, SnapOPC, SnapOPC+, and REC copy sources, the copy capacity is the total capacity of all
volumes (slices or partitions) in the ETERNUS DX Disk storage system that are defined as copy sources. For REC
copy destinations, the copy capacity is the total capacity of all the volumes (slices or partitions) in the ETERNUS
DX Disk storage system that are defined as copy destinations.
If the ETERNUS DX Disk storage system is used for both the " EC, OPC, QuickOPC, SnapOPC, SnapOPC+, or REC copy
source" and the " REC copy source", the copy capacity is the total capacity of both.
For multi-copy sessions, the copy capacity is the total capacity of multi-copy source volumes (slices or partitions),
multiplied by the number of multi-copy destinations for each copy source. The copy capacity for generation man-
agement by SnapOPC+ sessions is the total capacity of copy source volumes (slices or partitions) multiplied by
the number of generations in the copy destination volumes for each copy source.
Example for multi-copy sessions:
Copy area in the copy source logical volume A: 200M, Number of multi-copy destinations: 4
Copy area in the copy source logical volume B: 500MB, Number of multi-copy destinations: 8
Add 200
× 4 + 500 × 8 = 4800MB to the copy capacity (C1).
Note that "4" and "8" in this example correspond to the number of generations when calculating the copy table
size for SnapOPC+ sessions.
The number of sessions (N1) for multi-copy and SnapOPC+ is 4 + 8 = 12.
When executing OPC Restoration from a copy destination with multi-copy and SnapOPC+ multi-generation
enabled, select one copy destination and apply the above formula. Other copy destinations are calculated as
being normal multi-copy and SnapOPC+ multi-generation.
M: Resolution (The same value is used in the ETERNUS DX Disk storage system. Set "×1" if possible.)
C1: The total copy capacity (GB) for EC/REC, and OPC/QuickOPC/SnapOPC/SnapOPC+ without OPC
Restoration (*1)
N1: The number of sessions EC/REC, and OPC/QuickOPC/SnapOPC/SnapOPC+ without OPC Restoration.
S1 [MB] = ((2 × C1 / M) + N1) × 8 [KB] / 1024 (Round up decimal point)
M: Resolution (The same value is used in the ETERNUS DX Disk storage system. Set "×1" if possible.)
C2: The total copy capacity (GB) for OPC/QuickOPC/SnapOPC/SnapOPC+ with OPC Restoration in the
volume (*1)
N2: The number of sessions for OPC/QuickOPC/SnapOPC/SnapOPC+ with OPC Restoration
S2 [MB] = ((2 × C2 / M) + N2) × 2 × 8 [KB] / 1024 (Round up decimal point)
B
A