Fujitsu ETERNUS DX100 S3 - Table 20 FTRP Thresholds; Table 21 FTV Thresholds

Perform a TPV/FTV capacity optimization if "Thick" has changed to "Thin". By optimizing the ca-
pacity, the area that was allocated to an FTV is released and the FTV becomes usable. If a
TPV/FTV capacity optimization is not performed, the usage of the FTV does not change even af-
ter the Allocation method is changed.
The capacity of an FTV can be expanded after it is created.
For details on the number of FTVs that can be created, refer to "Volume
" (page 26).
● Threshold Monitoring of Used Capacity
When the used capacity of an FTRP or an FTV reaches the threshold, an alarm notification can be
sent from ETERNUS SF Storage Cruiser. There are two types of thresholds: "Attention" and "Warn-
ing". A different value can be specified for each threshold type.
Make sure to add drives before free space in the FTRP runs out, and add FTSP capacity from ETER-
NUS SF Storage Cruiser.
•
FTRP Thresholds
There are two FTRP usage thresholds: Attention and Warning.
Table 20 FTRP Thresholds
Threshold Selectable range Default Setting conditions
Attention 5 (%) to 80 (%) 75 (%) Attention threshold £
Warning thresh-
old
The "Attention" threshold can be
omitted.
Warning 5 (%) to 99 (%) 90 (%)
•
FTV Thresholds
There is only one FTV usage threshold: Attention. If there is insufficient capacity for the FTV unal-
located space in the pool free space, an alarm notification is sent. The threshold is determined by
the ratio of free space in the FTSP and the unallocated FTV capacity.
Table 21 FTV Thresholds
Threshold Selectable range Default
Attention 1 (%) to 100 (%) 80 (%)
•
When the Flexible Tier function is enabled, 32 work volumes (physical capacity is 0MB) are cre-
ated. The maximum number of volumes, which can be created in the
ETERNUS DX, are re-
duced, depending on the number of these work volumes.
•
If an FTSP or an FTRP includes one or more RAID groups that are configured with Advanced
Format drives, the write performance may be reduced when accessing FTVs created in the rel-
evant FTSP or FTRP from an OS or an application that does not support Advanced Format.
•
The FTRP capacity that can be used for VVOLs differs from the maximum Thin Provisioning
Pool capacity. For details, refer to "VMware VVOL" (page 136).
2. Basic Functions
Operations Optimization (Virtualization/Automated Storage Tiering)
52
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems
Design Guide (Basic)
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