Use new rsync options ?

[kapouer]

Hi,
things like
--compress-choice=zstd --compress-level=3 --checksum-choice=xxh3

could improve a lot the restore from backup.

Is there a way to pass those arguments to rsync ?

[martinmarques]

This is not possible at the moment. But we will consider it as a future enhancement.

Do you have any data regarding improvements when using any of those options with rsync?

[kapouer]

I tested zstd on wals and it was faster and more compressed than pigz, so I suppose it can benefit to backup too.

[kapouer]

Another thing that would improve the speed of backups is the ability to use the (unencrypted) rsync protocol, because it gives 3 times the bandwidth of doing it through ssh, at the cost of being unencrypted (which is okay in some private network situations).

[martinmarques]

I tested zstd on wals and it was faster and more compressed than pigz, so I suppose it can benefit to backup too.

This is something that you may get for free with a feature we are working on. Basically you could take compressed backups with zstd compression and on restore time tell barman to ship the backups compressed to the remote node and decompress them there.

[kapouer]

That would be cool - I can spot the difference easily when dealing with that 15TB cluster backup :)