Date: Sun, 04 May 2014 14:11:19 +0100 From: Karl Pielorz <kpielorz_lst@tdx.co.uk> To: Pete French <petefrench@ingresso.co.uk>, freebsd-geom@freebsd.org Subject: Re: Anyone using HAST in production / performance? Message-ID: <CEFDCA91DE72D1DB2DD40453@study64.tdx.co.uk> In-Reply-To: <E1WfAN6-0000lN-UU@dilbert.ingresso.co.uk> References: <E1WfAN6-0000lN-UU@dilbert.ingresso.co.uk>
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--On 29 April 2014 16:55:04 +0100 Pete French <petefrench@ingresso.co.uk> wrote: > A belated followup to this, but yes, I have been using it in > production for a while now - it replaces an older stack > we constructed based on gmirror and ggated. Much mucy better and > far more repliable. I've used ggated before - I never got it working reliably enough to use :( - But it was very, very fast! ;) > Performance wise I havent done any real testing I am > afraid, aside form looking at raw disc bandwidth using > gstat when we are doing a heavy operation. There we get > about 50 meg/second, which is more or less what I would expecrt > over gig ether. My main concern is - if I take 4 'local' disks and run ZFS atop of them (2 mirrors of 2) I get 130Mbyte/sec for writes. If I switch that to 4 disks over HAST (all local, no remote node - i.e. remote set to 'none') - that drops to 31Mbyte/sec. for the same setup. It doesn't get any lower with the remote node enabled - but that's a heck of a drop :( By the time you've setup a ZVOL and exported as iSCSI (or just CIFS/NFS) there's really nothing left performance wise :( > The setup is used to run mysql on top of - initially using myISAM tables, > but now using innodb. Performance appears to be fine - i,.e. I havent > noticed any issues, but as I said, we havent actually treid to measure > it. I guess if you're just using the zool 'locally' - that 31Mbyte/sec may be close to the performance you're getting [estimated]? What version of FreeBSD are you using? I'm just wondering if that's making a difference... -Karl
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