Hi, >> 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. Regards, Jens