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Quantum DXi4000 User’s Guide
265
Glossary
B
Blockpool
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
DXi4000 and uses a variable length compression type algorithm
to compare this to existing data in the blockpool. Unique blocks
are added to the blockpool and all known blocks are indexed.
The basic unit of computer memory which is large enough to
hold one character.
C
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.
D
Data Deduplication
A process of removing coarse-grained
redundancy from data prior to storing or transmitting it. The
granularity may vary, but generally data deduplication deals
with redundancy in grains of several kilobytes. When you select
Enable Data Deduplication
for a NAS share, data
deduplication is running all of the time. Backup data is sent to
the DXi4000 and data deduplication is performed on data as it
Summary of Contents for DXi4510
Page 1: ...User s Guide Quantum DXi4000 6 67092 03 Rev A...
Page 16: ...Tables xvi Quantum DXi4000 User s Guide...
Page 24: ...Preface xxiv Quantum DXi4000 User s Guide...
Page 42: ...Chapter 1 DXi4000 System Description Network Segmentation 18 Quantum DXi4000 User s Guide...
Page 52: ...Chapter 2 Basic Operations Locating Serial Numbers 28 Quantum DXi4000 User s Guide...
Page 272: ...Chapter 10 DXi4000 Utilities Reboot Shutdown 248 Quantum DXi4000 User s Guide...
Page 288: ...Appendix B Troubleshooting Common Problems and Solutions 264 Quantum DXi4000 User s Guide...