On Tue, Jul 03, 2007 at 10:31:28AM -0700, Richard Elling wrote: > Albert Chin wrote: > > On Tue, Jul 03, 2007 at 09:01:50AM -0700, Richard Elling wrote: > >> Albert Chin wrote: > >>> Some of the Sun storage arrays contain NVRAM. It would be really nice > >>> if the array NVRAM would be available for ZIL storage. It would also > >>> be nice for extra hardware (PCI-X, PCIe card) that added NVRAM storage > >>> to various sun low/mid-range servers that are currently acting as > >>> ZFS/NFS servers. Or maybe someone knows of cheap SSD storage that > >>> could be used for the ZIL? I think several HD's are available with > >>> SCSI/ATA interfaces. > >> First, you need a workload where the ZIL has an impact. > > > > ZFS/NFS + zil_disable is faster than ZFS/NFS without zil_disable. So, > > I presume, ZFS/NFS + an NVRAM-backed ZIL would be noticeably faster > > than ZFS/NFS + ZIL. > > ... for NFS workloads which are sync-sensitive.
Well, yes. We've made the decision not to set zil_disable in lieu of the possibility of the ZFS/NFS server crashing and having the clients out of sync with what's on the ZFS/NFS server. I think this is the common case though for a ZFS/NFS server. -- albert chin ([EMAIL PROTECTED]) _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
