Vabavaralised varundusvahendid

Autor

Kaspar Prei AK31

Sissejuhatus

Andmetest varundamine on hädavajalik, selle vajalikuses ei saa kindlasti kahelda. Meil on valida tasuta ja tasuliste varundusvahendite vahel. Siinkohal toon välja Linuxi operatsioonisüsteemis enamlevinud tasuta varundusvahenditest. Nendeks on Time Vault, Amanda, Duplicity, BackupPC, rsync, Bacula. Olen välja toonud just need varundusvahendit nende suurema populaarsuse ja funkstionaalsuse erinevuse tõttu.

Varundusvahendid

Time Vault

Amanda

AMANDA on rakendus, mis lubab varundusserveril varundada mitmeid erinevaid tööjaamu/serverid linti, kõvakettale või ka optilisele seadmele.

Erinevad võimalused:

• Disainitud suure arvu klientide ning andmevoo jaoks, samas on seda lihtne installeerida ning kasutada.
• Võimaldab kasutada palju erinevaid lindiseadmeid. Uusi seadmeid on ülilihtne lisada
• Võimaldab kasutada turvalist liiklust, kasutades selleks OpenSSH-d.
• Võimaldab kasutada ühe varundustöö juures rohkem kui ühte linti, kuid ei ole võimeline ühte faili erinevate lintide vahel jagama.

* It will back up multiple machines in parallel to a holding disk. For example, a ~2 Gb 8mm tape on a ~240K/s interface to a host with a large holding disk can be filled by Amanda in under 4 hours

   * Either the client or tape server may do software compression, or hardware compression may be used. On the client side, software compression reduces network traffic. On the server side, it reduces client CPU load. Software compression may be selected on an image-by-image basis
   * Supports Kerberos 4 security, including encrypted dumps
   * Can encrypt dumps on Amanda client or on Amanda client using GPG or any encryption program
   * Support for:
     Periodic archival backup, such as taking full dumps to a vault away from the primary site
     Incremental-only backups where full dumps are done outside of Amanda, such as very active areas that must be taken offline, or no full dumps at all for areas that can easily be recovered from vendor media
     Always doing full dumps, such as database areas that change completely between each run or critical areas that are easier to deal with during an emergency if they are a single-restore operation
   * Uses a simple tape management system and protects itself from overwriting tapes that still have valid dump images and from tapes not allocated to the configuration. Images may be overwritten when a client is down for an extended period or if not enough tapes are allocated, but only after Amanda has issued several warnings. Amanda can also be told to not reuse specific tapes
   * A validation program may be used before each run to note potential problems during normal working hours when they are easier to correct. An activity report is sent via e-mail after each run. Amanda can also send a report to a printer and even generate sticky tape labels
   * Recovers gracefully from errors, including down or hung machines
   * Includes a pre-run checker program, that conducts sanity checks on both the tape server host and all the client hosts (in parallel), and will send an e-mail report of any problems that could cause the backups to fail

Duplicity

BackupPC

rsync

Bacula

Kasutatud materjalid

http://www.linuxlinks.com/article/20090105114152803/Backup.html

http://www.junauza.com/2009/01/7-best-freeopen-source-backup-software.html