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The Next3 filesystem

The Next3 filesystem

Posted Jun 23, 2010 12:16 UTC (Wed) by Cato (subscriber, #7643)
In reply to: The Next3 filesystem by cmccabe
Parent article: The Next3 filesystem

Since I turn off disk write caching that bypasses the problem of write barriers being disabled in such kernels. For backups, I use DAR (like tar but with granular checksums for easier recovery from corruption) and rsnapshot, which is rsync-based, but a true backup system as it saves multiple versions and runs very fast, like rsync - works very well as long as you don't have very large files that change frequently.


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The Next3 filesystem

Posted Jun 23, 2010 13:30 UTC (Wed) by nix (subscriber, #2304) [Link]

DAR (like tar but with granular checksums for easier recovery from corruption)
Actually par2 provides that feature. What dar gives you is multi-storage-medium support via running arbitrary scripts to change medium. tar has nothing like it.
works very well as long as you don't have very large files that change frequently
Like, uh, VM images? I hear they're quite common these days.

(If you've got a lot of those, try rdiff-backup. It's slower than rsnapshot, but when a file changes it stores rdiff-format compressed deltas from the new file to the old one, rather than resaving the entire old file all over again.)


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