Date: Fri, 10 Sep 2010 09:04:48 -0700 From: Gil Vidals <gvidals@gmail.com> To: freebsd-fs@freebsd.org Subject: ZFS write speed performance tuning (NFS) Message-ID: <AANLkTikv8H6uj12fXqXrcvMWeD-LhsUHwbQRjh9fS-zM@mail.gmail.com>
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I'm building my first ZFS NAS and I'm struggling with write speeds over NFS. I want to know if it is possible to somehow set NFS to async AND keep slogging active with my SSD write cache? Here is a brief run down of my write speeds on a 1 gigabit LAN and FreeBSD 8.1 using ZFS: WRITE SPEEDS of 1 GB file: 55 MB/sec: scp copy test 28 MB/sec: NFS with async (zil_disable="1") 12 MB/sec: NFS with sync (default settings) 3 x 1TB 7200 RPM SATA HDs CPU Intel i7 Controller: LSI 1068e Controller: ICH10R (for read and write SSDs) This NAS will eventually go into my VMware environment and unfortunately ESX uses o_sync in their NFS client. AFAIK, there is no way to change the VMware NFS client, so I thought of turning off async on the server side and yet somehow still use the ZIL SSD Cache for fast writes? Looking forward to learning more about ZFS. --Gil Vidals
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