Settings and operation management for the Flexible Tier function are performed with ETERNUS SF Storage Cruis-
er. For more details, refer to "ETERNUS SF Storage Cruiser Operation Guide for Optimization Option".
Figure 26 FTV Configuration
SSD
SAS disk
Nearline SAS disk
FTSP (High tier)
FTSP (Middle tier)
FTSP (Low tier)
: RAID group
FTRP (Parent pool)
Chunk
Chunk
FTV
•
Flexible Tier Pool (FTRP)
An FTRP is a management unit for FTSP to be layered. Up to three FTSPs can be registered in one FTRP. This
means that the maximum number of layers is three.
The priority orders can be set per FTSP within one FTRP. Frequently accessed data is stored in an FTSP with a
higher priority. Because FTSPs share resources with TPPs, the maximum number of FTSPs which can be created
is decreased when TPPs are created.
For data encryption, specify encryption for a pool when creating an FTRP or create an FTSP with a Self Encrypt-
ing Drive (SED).
•
Flexible Tier Sub Pool (FTSP)
An FTSP consists of one or more RAID groups. The FTSP capacity is expanded in units of RAID groups. Add RAID
groups with the same specifications (RAID level, drive type, and number of member drives) as those of the
existing RAID groups.
The following table shows the maximum number and the maximum capacity of FTSPs that can be registered
in an ETERNUS DX.
Table 18 The Maximum Number and the Maximum Capacity of FTSPs
Item
ETERNUS DX500 S4/DX500 S3
ETERNUS DX600 S4/DX600 S3
The maximum number of Flexible Tier Pools
60
64
The maximum number of Flexible Tier Sub Pools
256 (*1)
The maximum capacity of the Flexible Tier Sub Pool
3,072TB (*2)
8,192TB (*2)
Total capacity of the Flexible Tier Volume
3,072TB
8,192TB
2. Basic Functions
Operations Optimization (Virtualization/Automated Storage Tiering)
51
FUJITSU Storage ETERNUS DX500 S4/DX600 S4, ETERNUS DX500 S3/DX600 S3 Hybrid Storage Systems Design Guide (Basic)
Copyright 2019 FUJITSU LIMITED
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