Data domain compression factor

  • What is the compression rate in data compression?

    Data compression ratio is defined as the ratio between the uncompressed size and compressed size: Thus, a representation that compresses a file's storage size from 10 MB to 2 MB has a compression ratio of 10/2 = 5, often notated as an explicit ratio, 5:1 (read "five" to "one"), or as an implicit ratio, 5/1..

  • What is the purpose of Dell data domain?

    Data Domain is disk-based Backup and Restore appliance, that provide data protection and disaster recovery (DR) in the enterprise environment.
    Data Domain is designed to reduce the amount of disk storage that is required to retain and protect data..

  • A Data Domain system provides an alternative for disk and tape volume pools in NetWorker.
    The Data Domain file system is optimized for sequential read and write operations.
    This provides for a great fit with existing NetWorker disk-based or VTL abilities.

What is system compression effect?

At first, we will explain the overall system compression effect, which tells us the realistic compression achieved in a Data Domain system:

  1. the amount of user data
  2. the amount of physical space consumed
  3. the ratio of them

This ratio is referred to as "system effective compression ratio" in this document.
,

What is the difference between compression and de-duplication in DDoS?

1.
Introduction Compression is a data reduction technology which aims to store a data set using less physical space.
In Data Domain systems (DDOS), we do dedupe and local compression to compress user data.
De-duplication, or "dedupe," is used to identify redundant data segments and store only unique data segments.

Compression: System Overall Effect

1. Fastcopy. When a fastcopy is done from a file in the active namespace … 2

Compression: Inline Statistics

1. The length of each write, referred to as raw_bytes; 2

Mysteries Brought by Dedupe

1. Do not be surprised when the initial backups only achieve small syste… 2

What is system compression effect?

At first, we will explain the overall system compression effect, which tells us the realistic compression achieved in a Data Domain system: the amount of user data, the amount of physical space consumed, and the ratio of them

This ratio is referred to as "system effective compression ratio" in this document

What is user data compression in DDoS?

The overall user data compression in DDOS is the joint effort of dedupe and local compression

DDOS uses " compression ratio " to measure the effectiveness of its data compression

Generally, it is the ratio of the total user data size to the total size of compressed data or the used physical space size


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