Figure 27 Ftv Configuration; Table 20 The Maximum Number And The Maximum Capacity Of Ftsps - Fujitsu ETERNUS AF250 Design Manual

1. Function
Operations Optimization (Deduplication/Compression and Storage Virtualization)
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 27 FTV Configuration

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 AF.

Table 20 The Maximum Number and the Maximum Capacity of FTSPs

Item
The maximum number of Flexible Tier Pools
The maximum number of Flexible Tier Sub Pools
The maximum capacity of the Flexible Tier Sub Pool
Total capacity of the Flexible Tier Volume
Chunk
MLC SSDs
FTSP (High tier)
FTRP (Parent pool)
FUJITSU Storage ETERNUS AF250 S2, ETERNUS AF250 All-Flash Arrays Design Guide (Basic)
Copyright 2019 FUJITSU LIMITED
FTV
Chunk
Value SSDs
FTSP (Middle tier)
ETERNUS AF250 S2/AF250
24
24 (*1)
2,048TB (*2)
2,048TB (*3)
53
: RAID group
P3AG-1822-09ENZ0