It's not a useful measure because it's not the same thing at all. Dedup only wor... | Hacker News

Hacker News new | past | comments | ask | show | jobs | submit

login

bensummers on Nov 2, 2009 | parent | context | favorite | on: ZFS Deduplication

It's not a useful measure because it's not the same thing at all. Dedup only works if the block is aligned to a ZFS block size. Compression will find blocks which have no particular alignment.

atamyrat on Nov 2, 2009 [–]

If they were same thing, you'd get the exact result, but not an approximation.

tar.x will compress chunks of data that is smaller than zfs block size. ZFS dedup + ZFS compression will compress them as well, so what's the problem?

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact