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Low Performance creating and expireing backups with dirvish (rsync)
Hello, I've got a ReadyNAS RN102. I manually installed dirvish (http://www.dirvish.org/dirvish.8.html), a backup tool which uses rsync with hardlinks. With ReadyNAS OS 6.2.x, expiring old backup...
Your data volume is extremely full.
I would suggest getting volume usage down to 80% then running a balance.
With defrag and balance scheduled weekly (run these at times when the NAS is being used lightly) you should find performance is better than what it was before for you.
A short description, what dirvish does:
Backup: rsync with hardlinks, example:
rsync -vrltH --delete -pgo --stats -D --numeric-ids --link-dest=/LOCAL/Backup/dirvish/home/20151216-01-45/tree /home/ /LOCAL/Backup/dirvish/home/20151217-06-22/tree
Expire: simply rm -rf of the complete directory
I think, the built-in backup manager of the ReadyNAS does the same. Actually, I cannot test it, cause my disks are hardly full. New disk are ordered. I will do a complete new install and copy the files from the old disks.
The biggest problem is a backup of a remote site (rsync with ssh).
I found some posts here, complaining about btrfs cleanup or balance since 6.4.x. But I don't see any btrfs-jobs in "top" in the commandline. Only some kworker jobs popping up while removing or rsyncing.
I read, that with 6.4.0, btrfs quota was activated. Could my issue come from that?
Kind regards
Can you send in your logs (see the Sending Logs link in my sig)?
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