On 1/11/07, Erik Trimble <[EMAIL PROTECTED]> wrote:
Just a thought: would it be theoretically possible to designate some device as a system-wide write cache for all FS writes? Not just ZFS, but for everything... In a manner similar to which we currently use extra RAM as a cache for FS read (and write, to a certain extent), it would be really nice to be able to say that a NVRAM/Flash/etc. device is the system-wide write cache, so that calls to fsync() and the like - which currently force a flush of the RAM-resident buffers to disk - would return as complete after the data was written to such a SSD (even though it might not all be written to a HD yet).
As a first step, we could just mark the physical vdev(s) corresponding to such device(s), and use that as the sole backing store for the ZIL. That would give us a quick win for the NFS/ZFS model. -- Regards, Jeremy _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
