•
To use the Deduplication/Compression function, the controller firmware version of the
ETER-
NUS DX must be V10L88-8000 or later (*1).
•
Releasing all the unused areas may take some time because the area release process releases
the areas one by one after the command is issued or after the optimization is executed.
•
The area release operation may result in an incomplete release of the physically allocated
areas depending on the storage system status, on the I/O load, or on whether the data in the
released area is duplicated.
•
The deduplication rate may temporarily decrease due to a CM failure, a firmware update, or a
blackout.
•
If a failure occurs in a RAID group configuring the TPP, or a bad sector occurs in the DED-
UP_SYS Volume or the DEDUP_MAP Volume, the data of all the Deduplication/Compression
Volumes in the TPP may be deleted.
*1 : When using the controller firmware for the China region, the controller firmware version
must be V10L88-9008 or later.
● Functional Details
Figure 66 Details of the Deduplication/Compression Function
Deduplication/
Compression
Volume
(a virtual volume
that can be seen
from the server)
ETERNUS DX
Server
I/O request
Thin Provisioning Pool (TPP)
D
C
B
A
DEDUP_MAP0
(TPV)
Non-Deduplication/
Compression
Volume
DEDUP_MAP1
(TPV)
Actual written data after
deduplic
ation/compression
DEDUP_SYS (TPV)
Maps the Deduplication/
Compression Volume
(or the virtual volume)
and the actual written data
D
C
B
A
F
E
B
A
F
E
B
A
D
C
B
A
F
E
3. SAN Functions
Operations Optimization (Deduplication/Compression)
117
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems
Design Guide (Basic)
Copyright 2023 Fujitsu Limited
P3AM-7642-32ENZ0
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