Fujitsu ETERNUS AF250 - Table 11 Volumes that Are to be Created Depending on the Selection of Deduplication and Compression; Table 12 Deduplication;Compression Setting for Tpps Where the Target Volumes Can be Created

If I/O load exists in the ETERNUS AF, 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 11 Volumes That Are to Be Created depending on the Selection of "Deduplication" and "Compression"
Condition
Volumes that are to be created
Deduplication Compression
Enable Enable Deduplication/Compression Volumes where both Deduplica-
tion and Compression are enabled
Enable Disable Deduplication/Compression Volumes where only Deduplication
is enabled
Disable Enable Deduplication/Compression Volumes where only Compression
is enabled
Disable Disable TPVs for SAN where both Deduplication and Compression are
disabled
•
Deduplication/Compression setting for TPPs where the volumes can be created
Table 12 Deduplication/Compression Setting for TPPs Where the Target Volumes Can Be Created
Condition Deduplication/Compression setting for the destination TPP
Deduplication Compression
Only Deduplica-
tion is enabled
Only Compression
is enabled
Both Deduplica-
tion and Compres-
sion are enabled
Both Deduplica-
tion and Compres-
sion are disabled
Enable Enable
´ ´
¡
´
Enable Disable
¡
´ ´ ´
Disable 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.
1. Function
Operations Optimization (Deduplication/Compression and Storage Virtualization)
42
FUJITSU Storage ETERNUS AF250 S2, ETERNUS AF250 All-Flash Arrays
Design Guide (Basic)
Copyright 2019 FUJITSU LIMITED
P3AG-1822-09ENZ0