Short question regarding LZ4 compression and data recovery safety.

[RvdKraats]

Hi All,

I was just wondering, if I start using LZ4 compression on my system (I assume that would mean having to move my data from/to my pool to compress my existing data), would the compressed data reduce the probability of data repair/recovery by ZFS? Or is it just all the same from the ZFS perspective?

Thanks!

Rene.

 

[Dusan]

It's the same. FYI, the ZFS metadata are compressed by default even if the user data compression is not enabled (unless you disable it via sysctl vfs.zfs.mdcomp_disable=1).

 

[RvdKraats]

Good to know, thanks :)

Do you have any experience with LZ4's compression ratios? I know it depends on the data (DVD images, movies, PDF, textfiles), but I didn't find any real-world examples yet.