21759: Acronis Backup & Recovery 11: Deduplication Enhancements

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Last update: 08-04-2016

Enhancements of deduplication in Acronis Backup & Recovery 11

This article applies to:

  • Acronis Backup & Recovery 11 Advanced Server
  • Acronis Backup & Recovery 11 Advanced Workstation
  • Acronis Backup & Recovery 11 Advanced Server SBS Edition
  • Acronis Backup & Recovery 11 Virtual Edition


The following improvements have been made to deduplication functionality in Acronis Backup & Recovery 11:

  • Encrypted NTFS files can be deduplicated;
  • Files smaller than 4 KB can be deduplicated;
  • 64-bit architecture support: larger amount of memory can be used, which allows faster deduplication;
  • Data is compressed before transmission, reducing the network load;
  • TIB files are not blocked during indexing: it is possible to run incremental backups while indexing is in progress;
  • Parallel read-write operations do not block each other;
  • SQLite database engine is used for storing deduplication database instead of Firebird, allowing scalability: adding more RAM positively affects performance.


  • Encrypted archives cannot be deduplicated. As a workaround, you can encrypt the vault where archives are stored instead of the archive itself;
  • File system metadata is not deduplicated.

More information

See also Acronis Backup & Recovery 11.