Table 35 Ftrp Thresholds; Table 36 Ftv Thresholds; Figure - Fujitsu ETERNUS DX S5 Series Design Manual

2. Basic Functions
Operations Optimization (Virtualization/Automated Storage Tiering)
●
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 "Warning". 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 ETERNUS SF
Storage Cruiser.
FTRP Thresholds
•
There are two FTRP usage thresholds: Attention and Warning.
Table 35
Threshold
Attention
Warning
• FTV Thresholds
There is only one FTV usage threshold: Attention. If there is insufficient capacity for the FTV unallocated
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 36
Threshold
Attention
Caution
• When the Flexible Tier function is enabled, 64 work volumes (physical capacity is 0MB) are created.
The maximum number of volumes that can be created in the ETERNUS DX decreases by the number
of work volumes that are created.
• 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 relevant 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
FTRP Thresholds
Selectable range
5 (%) – 80 (%)
5 (%) – 99 (%)
FTV Thresholds
Selectable range
1 (%) – 100 (%)
"VMware VVOL" (page
Default Setting conditions
Attention threshold £ Warning threshold
75 (%)
The "Attention" threshold can be omitted.
90 (%)
151).
69
Default
80 (%)
Design Guide