3. SAN Functions
This chapter describes the functions that are available when a SAN connection is used.
Operations Optimization (Deduplication/Compression)
•
A single controller configuration differs from a dual controller configuration in the following
ways:
-
The Deduplication/Compression function cannot be used.
•
The Deduplication/Compression function cannot be used if the Unified kit/Unified License is in-
stalled.
Deduplication/Compression
The Deduplication/Compression function analyzes duplicated data in every 4KB of the write data
from the server, and writes the duplicated data only once. After the first write, the data is refer-
enced instead of writing the same data again. This reduces the total write size. Also, with the Com-
pression function further data reduction is realized.
The Deduplication/Compression function can be used for the
ETERNUS DX200 S4/DX200 S3.
The Deduplication/Compression function can not only perform both deduplication and compres-
sion at the same time, but can also perform only deduplication or compression individually.
Overviews of the Deduplication/Compression function, the Deduplication function, and the Com-
pression function are described below.
110
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems
Design Guide (Basic)
Copyright 2023 Fujitsu Limited
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