With lz4 compression, should I use rsync -z?

[Fraoch]

Hello:

My zpool was created with lz4 compression, the default.

I'm running an rsync backup job from another machine using cron. My rsync command uses the -z option, which compresses the files.

Should I be doing this? The local machine is compressing the files first as it rsyncs, then FreeNAS compresses the files again using lz4.

I can't help but think this slows things down for no reason. Should I drop the -z rsync option?

Thanks.

 

[warri]

The ZFS compression works on the file system level, while rsync compression is only relevant for the transport.
So if you have enough bandwidth between the machines there is no need to compress the stream with rsync.

 

[Fraoch]

That should have been obvious to me if I had read up on rsync options....oops!

Thanks. -z option removed.

 

[cyberjock]

-z will also drive up CPU usage (which may or may not matter).