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linux:backup:overview [2016/05/16 14:15] – niziaklinux:backup:overview [2016/12/07 08:09] – [rsync] niziak
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 ====== Headline ====== ====== Headline ======
 +
 ===== rsync ===== ===== rsync =====
 +  * can be used over own proto without encryption (ssh) overhead
 +  * no build-in incremental snapshots support 
 +  * incremental backups of modified files possible (using --backup and --backup-dir params)
 +
 +==== delete files ====
 +<code bash>
 +rsync --delete-missing-args --backup --files-from list_file_to_delete.txt src/ 192.168.1.1::root/
 +</code>
 +
 +
 +===== rsnapshot =====
 +  * like rsync
 +  * incremental snapshots support. Each snapshoot looks like full source tree. Space is not wasted because hardlinks are used.
 +
 ===== rdiff-backup ===== ===== rdiff-backup =====
-  * no archives created - mirrored structure is available at destination (like rsync). Easy to browse.+  * Mirrored structure is available at destination (like rsync). Easy to browse. 
 +  * ACL and extended attributes support 
 +  * Update is slow 
   * special directory ''rdiff-backup-data'' are also created at dest where old versions are kept   * special directory ''rdiff-backup-data'' are also created at dest where old versions are kept
   * [[http://www.nongnu.org/rdiff-backup/]]   * [[http://www.nongnu.org/rdiff-backup/]]
 +  * <code>sudo apt-get install python-pylibacl python-xattr</code>
  
 ===== duplicity ===== ===== duplicity =====
-  * encrypted/compressed volumes +  * No direct access to backups. Backups are stored in PGP encrypted/compressed tar volumes. 
-  * restarting of broken backup needs only to re-download first volume from destination+  * Restarting of broken backup needs only to re-download first volume from destination
  
  
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   * front end to duplicity   * front end to duplicity
  
 +<code bash>
 +duply my-backup backup
 +duply my-backup cleanup --extra-clean --force
 +</code>
 +
 +====== Performance ======
 +Backups to NSA310 over fast ethernet. Hard disc encrypted with software ARM-optimized AES. Average network copy performance 6-8MB/s.
 +About 22GB of small files.
 +
 +^  proto  ^  tool          ^ initial copy ^  update no changes  ^  1GB added ^ 1GB removed ^
 +|  rsync  | rsync          |              |  22s                |  3m25      |  0m34       |
 +|  ssh    | rdiff-backup   | 144m (2:24)  |  12m                |  18m       |  19m        |
 +|  rsync  | rsnapshot      |              |                     |            |             |