Date: Thu, 29 Mar 2007 02:41:45 -0700 (PDT) From: "R. B. Riddick" <arne_woerner@yahoo.com> To: "Szabó" "Péter" <matyee@mail.alba.hu>, freebsd-geom@freebsd.org Subject: Re: raid3 is slow Message-ID: <869857.70440.qm@web30312.mail.mud.yahoo.com> In-Reply-To: <005301c771e4$bb0a3900$6502a8c0@peteruj>
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--- Szabó Péter <matyee@mail.alba.hu> wrote: > Array problem solved. But my problem is not the low read/write performance, > my problem is the high load. I start a single bittorrent download to the > encoded raid3 partition with 2.5MB/s speed, and the load is 2.5. > Hmm... As far as I can see it, u have the following tasks: 1. talking to the disks 2. label-related stuff 3. graid3 related stuff (splitting-up requests, XOR-ing all data) 4. gbde related stuff (encoding) 5. apllication stuff 6. network stuff You can see, how those tasks load ur CPU(-s(?)), when u use this command: top -S during this download process... The output of systat -vmstat during the download process might be quite interesting, too... You may want to do the download to another disk or to /dev/null somehow (in order to exclude the influence of graid3)... -Arne ____________________________________________________________________________________ Food fight? Enjoy some healthy debate in the Yahoo! Answers Food & Drink Q&A. http://answers.yahoo.com/dir/?link=list&sid=396545367
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