Quantum DXi4500 User Manual page 219

A
B
C
Quantum DXi4500 User's Guide
Adaptive In-line Data Deduplication When you select Enable Data
Deduplication for the NAS share, data deduplication is running
all of the time and cannot be disabled. Backup data is sent to
the DXi4500 and data deduplication is performed on data as it
is ingested. Data deduplication begins when the backup begins.
The advantage of selecting adaptive in-line data deduplication is
that disk space is saved immediately.
Block Pool A pool of all unique data blocks that were captured during
the data deduplication cycle. When backup jobs occur, the data
deduplication engine searches for new data entering the
DXi4500 and uses a variable length compression type algorithm
to compare this to existing data in the block pool. Unique
blocks are added to the block pool and all known blocks are
indexed.
Byte The basic unit of computer memory which is large enough to
hold one character.
Compress A process of removing fine-grained redundancy from data
prior to storing or transmitting it. The granularity may vary, but
generally compression deals with redundancy in grains of a few
bytes.
Glossary
197