Table 20 Ftrp Thresholds; Table 21 Ftv Thresholds - Fujitsu ETERNUS DX100 S4 Design Manual

2. Basic Functions
Operations Optimization (Virtualization/Automated Storage Tiering)
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
●
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
Attention
Warning
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
Attention
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
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems Design Guide (Basic)
Selectable range
5 (%) to 80 (%)
5 (%) to 99 (%)
Selectable range
1 (%) to 100 (%)
"VMware VVOL" (page
52
Copyright 2023 Fujitsu Limited
"Volume" (page
Default Setting conditions
75 (%) Attention threshold £ Warning thresh-
old
90 (%)
The "Attention" threshold can be
omitted.
Default
80 (%)
136).
26).
P3AM-7642-32ENZ0