Ubuntu now uses the deadline IO scheduler

Discussion in 'all things UNIX' started by Gullible Jones, Mar 11, 2013.

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  1. https://bugs.launchpad.net/ubuntu/ source/linux/ bug/1008400

    Also applies in Precise, which I'm using ATM.

    Boot speed seems a bit faster, and the system is more responsive when installing packages. OTOH swapping now causes a lot of lag (though I was able to avoid that by increasing vm.page-cluster to 5). In general it's an improvement IMO, though it doesn't solve the bigger issue of Unity being a pig.

    The most notable effect of this, though, is that the update-apt-xapian-index misfeature is effectively fixed; the process now runs for a much shorter time, and does not impair desktop performance as much.
     
  2. Mrkvonic

    Mrkvonic Linux Systems Expert

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    For most people, the change is irrelevant.
    Won't make any difference most of the time.
    Mrk
     
  3. moontan

    moontan Registered Member

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    Deadline is also the default on Linux Mint.

    apparently, it's good to use Deadline if you are using a SSD, instead of noop or cfq
     
  4. shuverisan

    shuverisan Registered Member

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    Phoronix did a test of IO schedulers about a year ago. I use CFQ on rotating drives and deadline on SSDs, no perceptible difference to me.

    http://www.phoronix.com/scan.php?page=article&item=linux_iosched_2012&num=1

     
  5. Au contraire, effectively fixing the apt-xapian-index problem is big IMO.
     
  6. NGRhodes

    NGRhodes Registered Member

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    And how many people noticed any difference ?
     
  7. Hungry Man

    Hungry Man Registered Member

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    It'll make a larger difference for mobile users, but everyone should notice things 'happening' somewhat faster. CFQ doesn't make as much sense for a phone/desktop OS.
     
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