I'm testing FreeBSD 9.0-BETA with an eye toward eventually using FreeBSD 9.0 to replace some existing OpenSolaris 2008.11 installations. I've found NFS file creation performance (as measured by Bonnie++) is equally slow for both with default settings. However, on OpenSolaris I disable the ZIL to improve file creation performance. This tuning parameter was removed from FreeBSD 9.0; its replacement is supposed to be the per-filesystem flag "sync", but setting this flag seems to have no effect.
I did recompile the FreeBSD kernel without debugging features before doing the tests, so I don't think this is a case of debugging code slowing things down. Here's the relevant data; these are all from bonnie++'s "sequential create" benchmark. OpenSolaris 2008.11, default settings: 58/second OpenSolaris 2008.11, with "zil_disable=1": 1258/second FreeBSD 9.0-BETA, default settings: 107/second FreeBSD 9.0-BETA, with "sync=disabled": 106/second It appears the "sync" ZFS parameter has no effect in FreeBSD. Has anyone else seen this? Is there a way to improve NFS file creation performance now that zil_disable has been removed? _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
