Re: filesystem slowdown with backports kernel
- Date: Wed, 17 Oct 2018 16:44:25 +0200
- From: "Support (Jens)" <support@xxxxxxxxxx>
- Subject: Re: filesystem slowdown with backports kernel
>> we have a NAS system acting as a place to store our server's backups
>> (via rsync with link-dest). On that NAS we switched from the stable
>> kernel (4.9) to the one provided by backports (4.18) because of an
>> unrelated problem. When we do that, we see a slowdown of our backup
>> process, from the backup via rsync itself to deleting old backup
>> directories. The slowdown seems to be connected to the number of
>> files/directories as backups of systems with less files seem less
>> affected than the ones with many files.
> I'd complete your tests with an invocation of 'perf record/perf top'
> on NFS server side.
> The reason being - you'll be able to point out at particular
> kernel/userspace functions that are responsible for this slowdown.
there is no NFS in play, everything was tested locally or did I
misinterpret your suggestion.