Well, I would caution at this point against the iscsi backend if you are planning on using NFS. We took a long winded conversation online and have yet to return to this list, but the gist of it is that the latency of iscsi along with the tendency for NFS to fsync 3 times per write causes performance to drop dramatically, and it gets much worse for a RAIDZ config. If you want to go this route, FC is a current suggested requirement.
On 5/30/06, Eric Schrock <[EMAIL PROTECTED]> wrote:
On Tue, May 30, 2006 at 03:55:09AM -0700, Ernst Rohlicek jun. wrote: > Hello list, > > I've read about your fascinating new fs implementation, ZFS. I've seen > alot - nbd, lvm, evms, pvfs2, gfs, ocfs - and I have to say: I'm quite > impressed! > > I'd set up a few of my boxes to OpenSolaris for storage (using Linux > and lvm right now - offers pooling, but no built-in fault-tolerance) > if ZFS had one feature: Use of more than one machine - currently, as I > understand it, if disks fail, no problem, but if the server machine > fails, ... > > I read in your FAQ that cluster features are on the way and wanted to > ask what's the status here :-) > > BTW I recently read about a filesystem, which has a pretty good > cluster architecture, called Google File System. The article on the > English Wikipedia has a good overview, a link to the detailed papers > and a ZDNet interview about it. > > I just wanted to point that out to you, maybe some of its design / > architecture is useful in ZFS's cluster mode. For cross-machine tolerance, it should be possible (once the iSCSI target is integrated) to create ZFS-backed iSCSI targets and then use RAID-Z from a single host across machines. This is not a true clustered filesystem, as it has a single point of access, but it does get you beyond the 'single node = dataloss' mode of failure. As for the true clustered filesystem, we're still gathering requirements. We have some ideas in the pipeline, and it's definitely a direction in which we are headed, but there's not much to say at this point. - Eric -- Eric Schrock, Solaris Kernel Development http://blogs.sun.com/eschrock _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
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