On Thu, Oct 6, 2011 at 5:45 AM, Gabriele Bulfon <gbul...@sonicle.com> wrote: > Hi, > NFS on zfs can be quite a pain with large number of small files. > After playing around it, I discovered this zfs_nocacheflush flag bringing me > back to high > performances on NFS. > Questions: > - How much unsafe is this?
This is completely unsafe and can easily lead to data loss unless you have a battery-backed cache. This setting determines whether the cache is flushed to complete transactions. NFS operations are synchronous. Use a log device if you want fast synchronous performance, or a mount option on the client to make operations async (if you don't mind losing recent NFS writes in the event of a crash). Disabling atimes may also help. -Albert _______________________________________________ OpenIndiana-discuss mailing list OpenIndiana-discuss@openindiana.org http://openindiana.org/mailman/listinfo/openindiana-discuss
