Date: Fri, 09 Mar 2007 17:25:42 +0300 From: Boris Samorodov <bsam@ipt.ru> To: Eugene Grosbein <eugen@www.svzserv.kemerovo.su> Cc: freebsd-hackers@freebsd.org, freebsd-ports@freebsd.org Subject: Re: Fwd: Abyssmal dump cache efficiency Message-ID: <11989769@srv.sem.ipt.ru> In-Reply-To: <20070223035617.GA18955@svzserv.kemerovo.su> (Eugene Grosbein's message of "Fri, 23 Feb 2007 10:56:17 %2B0700") References: <20070220182113.GC853@turion.vk2pj.dyndns.org> <200702211113.l1LBDbQn006859@lurza.secnetix.de> <5f67a8c40702220937h21dc6963r77637ba369549e25@mail.gmail.com> <20070223035617.GA18955@svzserv.kemerovo.su>
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On Fri, 23 Feb 2007 10:56:17 +0700 Eugene Grosbein wrote: > On Thu, Feb 22, 2007 at 12:37:00PM -0500, Zaphod Beeblebrox wrote: > > >Peter Jeremy wrote: > > >> I've found that you do get a worthwhile improvement in dump|restore > > >> performance by introducing a large (10's of MB) fifo between them. > > >> This helps reduce synchronisation between dump and restore (so that > > >> dump can continue to read whilst restore is busy writing a batch of > > >> small files and vice versa). There's a suitable port but I can't > > >> recall the name because I wrote my own. > > > > > >There are several. The most popular ones are probably > > >misc/team and misc/buffer. > > > > I can certainly vouch for that , too. I generally use "team 1m 32" (total > > of 32meg of buffer). Team seems to not want to buffer more than 1m per > > process and I think 32 is the max # of processes. > Someone, please take a look at trivial patch for team's buffer size here: > http://www.freebsd.org/cgi/query-pr.cgi?pr=ports/106806 > The maintainer timeout for the PR has occured long time ago. Committed, thanks for both your patches and patience. ;-) WBR -- Boris Samorodov (bsam) Research Engineer, http://www.ipt.ru Telephone & Internet SP FreeBSD committer, http://www.FreeBSD.org The Power To Serve
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