What is the minimum size of a file that can be deduplicated by NetBackup?

Veritas NetBackup's Media Server Deduplication Pool (MSDP) utilizes a variable-length segmentation algorithm to chunk data for deduplication. The configuration file, contentrouter.cfg, contains a parameter called MinSegmentSize, which defines the smallest possible data segment that can be created. By default, this value is set to 8 kilobytes (KB). Any file smaller than this minimum segment size cannot be chunked and is therefore bypassed by the deduplication engine. Consequently, 8 KB is the effective minimum size of a file that can be processed for deduplication in a standard NetBackup environment.

A. 1 KB: This file size is below the default minimum segment size (8 KB) for NetBackup MSDP and would not be processed for deduplication.

C. 64 KB: While this is a common block size in storage, it does not represent the minimum file size for NetBackup's deduplication process.

D. 128 KB: This represents the default average segment size (AvgSegmentSize) in NetBackup MSDP, not the minimum threshold for a file to be deduplicated.

1. Veritas NetBackup™ Deduplication Guide - Version 10.1. In the section "About the MSDP contentrouter.cfg file

" the guide details configuration parameters. It specifies the MinSegmentSize parameter and its default value.

Reference: Chapter 6: Managing MSDP configuration files

Section: About the MSDP contentrouter.cfg file. The parameter is listed as MinSegmentSize = 8. This indicates that the minimum size for a deduplication segment is 8 KB. (Note: Specific page numbers vary by document version

but the section and parameter names are consistent).