Operations Optimization (Deduplication/Compression and Storage
Virtualization)
Deduplication/Compression
The Deduplication/Compression function analyzes duplicated data in every 8KB of the write data from the server,
and writes the duplicated data only once. After the first write, the data is referenced instead of writing the same
data again. This reduces the total write size. Also, with the Compression function further data reduction is
realized.
The Deduplication/Compression function can not only perform both deduplication and compression at the same
time, but can also perform only deduplication or compression individually.
Overviews of the Deduplication/Compression function, the Deduplication function, and the Compression function
are described below.
●
Deduplication/Compression Function
This function removes duplicate data blocks, compresses the remaining data blocks, and then stores the
data.
Figure 16
Deduplication/Compression Overview
A B C D E F
Business server 2
Target volume for deduplication/compression
Analysis
A
B
C
D
A
B
C
D
Data 1
Business server 1
Data 2
A
B
E
F
A
B
E
F
Data 1 is
written
Data 2 is
written
Deduplication
Duplicate data blocks are removed
Compression:
Data blocks are compressed
ETERNUS AF
2. Basic Functions
Operations Optimization (Deduplication/Compression and Storage Virtualization)
42
Design Guide
Содержание ETERNUS AF S3 Series
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