Luca's meaningless thoughts  


by Leandro Lucarella on 2010- 07- 01 22:02 (updated on 2010- 07- 01 22:02)
tagged bacap, backup, en, floss, release, rsync, software - with 0 comment(s)

I've published my backup script (and named it Bacap, which is how it sounds when you pronounce "backup" in Spanish ;), as it suddenly became used by somebody else and received some patches =)

It has a simple home page for those wanting to see what is it about. I won't be doing formal releases thought, since is such a simple script, that would be overkill (just be thankful it has a git repo and a home page ;).


by Leandro Lucarella on 2009- 10- 11 16:56 (updated on 2009- 10- 11 16:56)
tagged backup, data deduplication, en, fs, lessfs, linux - with 0 comment(s)

Lessfs is an open source data deduplication filesystem:

Data deduplication (often called "intelligent compression" or "single-instance storage") is a method of reducing storage needs by eliminating redundant data. [...] lessfs can determine if data is redundant by calculating an unique (192 bit) tiger hash of each block of data that is written. When lessfs has determined that a block of data needs to be stored it first compresses the block with LZO or QUICKLZ compression. The combination of these two techniques results in a very high overall compression rate for many types of data.

Backup tracing collector for rc cycles reclamation

by Leandro Lucarella on 2008- 09- 07 01:05 (updated on 2009- 04- 02 18:42)
tagged backup, cycles, d, dgc, en, rc, tracing - with 0 comment(s)

The simpler way to reclaim cycles is to use a backup tracing garbage collector. But this way, even when GC frequency could be much lower, the infomation of reference counters are not used, and pauses can be very long (depending on the backup algorithm used).

I think some kind of mixture between RC and tracing GC could be done so I wont discard this option just yet, but I think more specialized algorithms can do better in this case.