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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!feed1.news.erols.com!howland.erols.net!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-atl-21.sprintlink.net!node2.frontiernet.net!not-for-mail From: dsf@node5.frontiernet.net (Dan Foster) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: ccd help Date: 14 Nov 1996 18:25:32 -0500 Organization: Frontier Internet, A reliable part of your life Lines: 45 Message-ID: <56g9pc$seo@node5.frontiernet.net> References: <3270DC0C.15E4@loopback.com> <328826FB.FF6D5DF@webspan.net> <56er96$us@cantina.clinet.fi> <E0vrxI.I9E@news.interactive.net> NNTP-Posting-Host: node5.frontiernet.net In article <E0vrxI.I9E@news.interactive.net>, Chris Mauritz <ritz@interactive.net> wrote: >I get about 4 articles per second. The limiting factor is >the speed at which my newsfeeds can hand me articles since >the machine and the disks are relatively idle. Average >disk seeks (according to iostat) is about 7-7.5ms so I suspect >this machine is more than capable of trouncing a 7 article/sec >threshold. Yup, that was my impression, too. The problem may be if you're not using streaming mode to get articles in/out (as IHAVE is pretty slow when done for every article in order). I notice that when I don't run streaming mode... I get 4 arts/sec... when I run with streaming, I get 11 arts/sec. I'm pushing for 15 arts/sec which may be possible if I can shave 1.2ms off history lookups by reorg'ing dynamically my history filesystem a bit plus turning off mirroring. We also don't run RAID 5 (overhead for parity is too big for news). I must admit that I'm not sure if streaming/non-streaming is an issue with Cnews or anything other than INN, sorry. As for optimizing NNRP access... best tip would be to reduce active file to around 500K (as opposed to 1.2MB - users *noticed* this difference right away) by carrying only the groups you need/want (ie I carry alt.*, comp.*, etc... and a few specific groups/hierarchies upon user request). Anything that means less work for innd (or Cnews or whatever) means more time to focus on other channels/areas, which may lend itself to a performance boost. Lots of things you can do. > I just need to find someone who can shove the >articles out the door fast enough for me to even remotely >stress the setup. If anyone has a stunningly fast news >server who'd like to feed me for a few days, I'd be happy >to add their feed to my current one and post the results. Email me if you're interested. Our setup uses a IBM SP/2 supercomputer with SSA disks (80 MB/sec technology) and a lot of patches to innd 1.4unoff4 for performance boosts. Wouldn't mind giving a 7 day feed or something. -Dan Foster Frontier Internet Internet: dsf@frontiernet.net