Vincent Fox wrote: > Are you already running with zfs_nocacheflush=1? We have SAN arrays with > dual battery-backed controllers for the cache, so we definitely have this set > on all our production systems. It makes a big difference for us. > > No, we're not using the zfs_nocacheflush=1, but our SAN array's are set to cache all writebacks, so it shouldn't be needed. I may test this, if I get the chance to reboot one of the servers, but I'll bet the storage arrays' are working correctly.
> As I said before I don't see the catastrophe in disabling ZIL though. > > No catastrophe, just a potential mess. > We actually run our production Cyrus mail servers using failover servers so > our downtime is typically just the small interval to switch active & idle > nodes anyhow. We did this mainly for patching purposes. > Wish we could afford such replication. Poor EDU environment here, I'm afraid. > But we toyed with the idea of running OpenSolaris on them, then just > upgrading the idle node to new OpenSolaris image every month using Jumpstart > and switching to it. Anything goes wrong switch back to the other node. > > What we ended up doing, for political reasons, was putting the squeeze on our > Sun reps and getting a 10u4 kernel spin patch with... what did they call it? > Oh yeah "a big wad of ZFS fixes". So this ends up being a hug PITA because > for the next 6 months to a year we are tied to getting any kernel patches > through this other channel rather than the usual way. But it does work for > us, so there you are. > Mmmm, for us, Open Solaris may be easier. I manly was after stability, to be honest. Our ongoing experience with bleeding edge Linux is painful at times, and on our big iron, I want them to just work. but if they're so slow, they're not really working right, are they? Sigh... > Give my choice I'd go with OpenSolaris but that's a hard sell for datacenter > management types. I think it's no big deal in a production shop with good > JumpStart and CFengine setups, where any host should be rebuildable from > scratch in a matter of hours. Good luck. > > True, I'll think about that going forward. Thanks, Jon > > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > -- - _____/ _____/ / - Jonathan Loran - - - / / / IT Manager - - _____ / _____ / / Space Sciences Laboratory, UC Berkeley - / / / (510) 643-5146 [EMAIL PROTECTED] - ______/ ______/ ______/ AST:7731^29u18e3 _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
