> ) The write cache is non volatile, but ZFS hasn't > been configured > to stop flushing it (set zfs:zfs_nocacheflush = > 1).
These are a pair of 2540 with dual-controllers, definitely non-volatile cache. We set the zfs_nocacheflush=1 and that improved things considerably. ZFS filesystem (2540 arrays): fsyncfile3 434ops/s 0.0mb/s 17.3ms/op 977us/op-cpu fsyncfile2 434ops/s 0.0mb/s 17.8ms/op 981us/op-cpu However still not very good compared to UFS. We turned off ZIL with zil_disable=1 and WOW! ZFS ZIL disabled: fsyncfile3 1148ops/s 0.0mb/s 0.0ms/op 18us/op-cpu fsyncfile2 1148ops/s 0.0mb/s 0.0ms/op 18us/op-cpu Not a good setting to use in production but useful data. Anyhow will take some time to get OpenSolaris onto the system, will report back then. This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
