Date: Mon, 28 Mar 2011 13:22:00 +0200 From: Claus Guttesen <kometen@gmail.com> To: FreeBSD Stable <freebsd-stable@freebsd.org> Subject: zfs, nfs and zil Message-ID: <BANLkTinZvLDkmUNHmDGQpQFRr31s=hyHuQ@mail.gmail.com>
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I've setup a server with FreeBSD 8.2 (prerelase) and patched zfs to ver. 28. The server has 11 disks each 2 TB in raidz2. The performance is very good and I've got approx. 117 MB/s on plain GB nics using iscsi. I'm mounting the FreeBSD-server from a couple of vmware esxi 4.1 servers using nfs, but when there is alot of i/o the server becomes unresponsive, easily triggered by installing ie. ms-sql. The server itself is up but is not reachable from the network. When I take the nic down and up again connection to the network is reestablished (ip-wise). A friend of mine has suggested that I disable the zil. The page http://wiki.freebsd.org/ZFSTuningGuide says 'Disabling ZIL is not recommended where data consistency is required (such as database servers) but will not result in file system corruption.' Has anyone tried to disable zil and achieved better performance and still maintain a consistent filesystem? -- regards Claus When lenity and cruelty play for a kingdom, the gentler gamester is the soonest winner. Shakespeare twitter.com/kometen
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