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Re:Bup – towards the perfect backup by mgbmtl on Monday November 17, 2014 @05:58PM (#8621295)
I'm not an expert by any means, but the most cited reasons are that it requires a very big amount of ram, and it depends a lot (obviously) on the type of data.
Re:Bup – towards the perfect backup by timewasted on Monday November 17, 2014 @06:25PM (#8621430)
In addition to the memory requirements, I seem to recall that it works at the block level, as opposed to the file level. So you could have two of the same file, but maybe one copy is written at the start of a block and one is written in the middle of a block. Same file, different blocks, so no deduplication.
Re:Bup – towards the perfect backup by aidenn0 on Monday November 17, 2014 @08:09PM (#8621876)
I'm pretty sure that ZFS doesn't do block-suballocation, so that scenario is not possible.