Date: Tue, 30 Oct 2007 12:06:17 -0500 From: Brooks Davis <brooks@freebsd.org> To: Dmitry Morozovsky <marck@rinet.ru> Cc: stable@freebsd.org, Brooks Davis <brooks@freebsd.org> Subject: Re: rrdtool performance tuning (fwd) Message-ID: <20071030170617.GA31835@lor.one-eyed-alien.net> In-Reply-To: <20071030123100.K39332@woozle.rinet.ru> References: <20071029111235.E69594@woozle.rinet.ru> <20071029195033.GA87137@lor.one-eyed-alien.net> <20071030123100.K39332@woozle.rinet.ru>
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[-- Attachment #1 --] On Tue, Oct 30, 2007 at 12:32:42PM +0300, Dmitry Morozovsky wrote: > On Mon, 29 Oct 2007, Brooks Davis wrote: > > BD> On Mon, Oct 29, 2007 at 11:13:09AM +0300, Dmitry Morozovsky wrote: > BD> > > BD> > [hmm, after thinking a bit I decided it would be more appropriate here, in > BD> > stable@] > BD> > > BD> > Dear colleagues, > BD> > > BD> > any hints to tune rrdtool with ~30k rrd files (approx 2k target devices)? > BD> > > BD> > machine is mostly IO-bound, showing 100% disk load with 8 or sometimes even 3 > BD> > mB/s, 300-400 tps (it's 2 SATA300 disks in gmirror) > BD> > BD> Store it on a memory file system and take periodic snapshots. The format is > BD> hopeless for large numbers of updates. The ganglia port's startup scripts show > BD> an example of doing this. > > I thought about this, but total size of these files is already more than > memory, and I'm not sure md would be suitable for this. FWIW, this is the only work around ganglia users have found. You might consider a solid state disk or one of the battery backed RAM cards out there if adding more memory and switching to a 64-bit OS isn't an option. -- Brooks [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFHJ2SIXY6L6fI4GtQRArbOAKDZWFb+zjd/fd2lM2mZL11H6JbtCACfblq0 WnUOe9cdw2NK10UDWKvcdOY= =06OA -----END PGP SIGNATURE-----
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