 | | | compressed file system | compressed file system 2006-01-18 - By Arjan van de Ven
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On Wed, 2006-01-18 at 12:35 -0500, Andrew Bacchi wrote:
> I'm rebuilding our backup system for AFS volumes. It will be about 1T
> in size for a full semester's worth of backups to disk. We would like
> to keep two semesters data on disk, before moving the older one to our
> TSM tape library. Each level 0 backup file is a binary file containing
> approximately 26,000 volumes. The incrimental backups are done three
> times weekly for 17 to 18 weeks in a trimester year. If there is a
> reliable file system that can compress our backup files, that will save
> a considerable amount of SATA storage.
one option would just be plain hardlinks between the backups... that
already will cut down majorly in the size.
Another cheap option is making each backup a cramfs (see mkcramfs). A
cramfs can be (read only) loopback mounted as filesystem; and it's
compressed when the image is created.
It's not quite a full filesystem in that you create it similar to how
you create .iso files, but it compresses ;) (btw you could even make
compressed .iso files just as well)
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