In an EMC Avamar backup, what is the role of sticky-byte factoring?

The correct answer is D. Consistently produces the same chunk result on unchanged data. The Avamar agent running on the backup client (avtar) traverses each directory in the backup. For each file in the backup: 1. Avtar checks the client's file cache to see if the file has been backed up before. Files that have been previously backed up are skipped from…

Data Domain Concepts and Features

Question

Options

ADetermines which chunks are sent to the Avamar server
BConsistently creates 24 KB chunks
CDetermines which files to chunk
DConsistently produces the same chunk result on unchanged data

How the community answered

(68 responses)

A
16% (11)
B
3% (2)
C
7% (5)
D
74% (50)

Explanation

The Avamar agent running on the backup client (avtar) traverses each directory in the backup. For each file in the backup: 1. Avtar checks the client's file cache to see if the file has been backed up before. Files that have been previously backed up are skipped from processing. 2. If there is no match in the file cache, sticky-byte factoring divides the file data into variable- 3. Each data chunk may be compressed. 4. Each compressed data chunk is hashed. The hash created from a data chunk is referred to asan atomic hash. Atomic hashes are combined to create Composites. The number of composites equals the depth of the file system being backed up.

Topics

#Avamar#sticky-byte factoring#chunking#deduplication

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