Table 59 Volumes That Are To Be Created Depending On The Selection Of "Deduplication" And "Compression; Table 60 Deduplication/Compression Setting For Tpps Where The Target Volumes Can Be Created - Fujitsu ETERNUS DX S5 Series Design Manual

3. SAN Functions
Operations Optimization (Deduplication/Compression)
*3: The chunk size (21MB – 336MB) during a TPP creation is maintained. The Deduplication/Compression function can be enabled for
TPPs whose chunk sizes are not 21MB.
*4: 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.
• Configuration method for the Deduplication/Compression function
Select the TPP where the Deduplication/Compression function is enabled, and create Deduplication/
Compression Volumes (TPVs) in the selected TPP.
Specify whether to enable or disable the Deduplication/Compression function for each TPV. TPVs (or
Deduplication/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 59
"Compression"
Condition
Deduplication
Enable
Enable
Disable
Disable
Deduplication/Compression setting for TPPs where the volumes can be created
•
Table 60
Condition
Deduplication
Enable
Enable
Disable
Disable
¡: Volumes can be created, ´: Volumes cannot be created
Note
TPPs with the Deduplication/Compression function enabled have one of the following attributes:
deduplication/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.
Volumes That Are to Be Created depending on the Selection of "Deduplication" and
Compression
Enable
Disable
Enable
Disable
Deduplication/Compression Setting for TPPs Where the Target Volumes Can Be Created
Deduplication/Compression setting for the destination TPP
Only Deduplication
Compression
is enabled
´
Enable
Disable
¡
´
Enable
Disable
¡
Volumes that are to be created
Deduplication/Compression Volumes where both Deduplication 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
Only Compression
is enabled
´
´
¡
¡
133
Both Deduplication Both Deduplication
and Compression and Compression
are enabled are disabled
´
¡
´ ´
´ ´
¡ ¡
Design Guide