On Tue, Nov 24, 2015 at 8:00 AM, Albert Cervin <alb...@acervin.com> wrote:
> Hi all, > > Please feel free to direct me to a list that is more suitable. > > We are trying to set up a fileserver solution for a web application that we > are building. This fileserver is running FreeBSD 10.2 and ZFS. Files are > written over CIFS with Samba running on the fileserver host. > > However, we are seeing en exponential decrease in performance to write to > the file server when the number of files in the directory grows (when it > goes up to ~6000 files it becomes unusable and the write time has gone from > a fraction of a second to ten seconds). > > We ran the same setup on a Linux machine with an ext4 file system which did > NOT suffer from this performance degradation. > I should hope not. ext4 vs zfs comparison isn't fair for either. > > Are these "holes" in write speed normal. Since this is the exact symptom we > are getting when the network writes start to be slow. > Totally normal. You'll want to reference: https://wiki.freebsd.org/ZFSTuningGuide In particular for that issue see: vfs.zfs.txg.timeout and tuning related to NFS. Performance is also heavily dependent on pool structure and io characteristics. For example, a pool of 3 2 disk mirrors is in general going to be much faster than 1 6 disk raidz2. -- Adam _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"