Table 40 Volumes That Are To Be Created Depending On The Selection Of "Deduplication" And "Compression; Table 41 Deduplication/Compression Setting For Tpps Where The Target Volumes Can Be Created - Fujitsu ETERNUS DX500 S4/DX600 S4 Design Manual

3. SAN Functions
Operations Optimization (Deduplication/Compression)
If I/O load exists in the ETERNUS DX, enabling or disabling the Deduplication/Compression function in the TPP
may take time. If I/O load exists, changing the setting of the Deduplication/Compression function for each TPP
is recommended.
Specify whether to enable or disable the Deduplication/Compression function for each TPV. TPVs (or Deduplica-
tion/Compression Volumes) where the Deduplication/Compression function is enabled and disabled can exist
together within the same TPP. However, these two types of TPVs should be located in separate TPPs.
Deduplication is performed for Deduplication/Compression Volumes within the same TPP. Deduplication is not
performed for data in different TPPs. In some cases, deduplication might not be performed even within the
same TPP.
To enable the Deduplication/Compression function for existing volumes, use the RAID Migration function.
Volumes that are to be created and the Deduplication/Compression setting for TPPs where the target volumes
can be created vary depending on the selection of "Deduplication" and "Compression".
Volumes that are to be created
•

Table 40 Volumes That Are to Be Created depending on the Selection of "Deduplication" and "Compression"

Condition
Deduplication
Enable
Enable
Disable
Disable
Deduplication/Compression setting for TPPs where the volumes can be created
•

Table 41 Deduplication/Compression Setting for TPPs Where the Target Volumes Can Be Created

Condition
Deduplication
Enable
Enable
Disable
Disable
¡: Volumes can be created
´: Volumes cannot be created
TPPs with the Deduplication/Compression function enabled have one of the following attributes: deduplica-
tion/compression, deduplication only, or compression only. The Deduplication/Compression Volume conforms
to the attribute of the TPP where the volume is created. TPVs where the Deduplication/Compression function
is enabled and disabled can exist together within each TPP.
FUJITSU Storage ETERNUS DX500 S4/DX600 S4, ETERNUS DX500 S3/DX600 S3 Hybrid Storage Systems Design Guide (Basic)
Compression
Enable
Disable
Enable
Disable
Deduplication/Compression setting for the destination TPP
Only Deduplica-
Compression
tion is enabled
Enable ´
Disable ¡
´
Enable
Disable
¡
116
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Volumes that are to be created
Deduplication/Compression Volumes where both Deduplica-
tion and Compression are enabled
Deduplication/Compression Volumes where only Deduplication
is enabled
Deduplication/Compression Volumes where only Compression
is enabled
TPVs for SAN where both Deduplication and Compression are
disabled
Both Deduplica-
Only Compression
tion and Compres-
is enabled
sion are enabled
´
¡
´ ´
´
¡
¡ ¡
Both Deduplica-
tion and Compres-
sion are disabled
´
´
´
¡
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