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Thread: Testing Out Linux File-Systems On A USB Flash Drive

  1. #11
    Join Date
    Aug 2009
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    Kansas City
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    2

    Default Try ext4 without journaling

    I've found that if I turn off journaling on ext4 on USB flash drives I get a pretty substantial speed boost for writes. Journaling can be disabled with the data=writeback option:

    mount -o data=writeback /dev/sdb1 /mnt

    It would be interesting to see how a non-journaled ext4 filesystem would fare in these benchmarks.

  2. #12

    Default

    This doesn't disable the journal, it just allows for data to be written without journaling, and the metadata is still journaled.

  3. #13
    Join Date
    Jan 2009
    Location
    UK
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    331

    Default

    Quote Originally Posted by BlackStar View Post
    What's the purpose of a removable USB drive in your opinion?
    Moving data between systems? Not everyone has their LAN set up to sync uid/gids over LDAP or whatever.

  4. #14
    Join Date
    Apr 2009
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    Toronto/North Bay Canada
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    877

    Default

    Dbench results for btrfs pulled a funny. Can someone tell me why the speed went up?

  5. #15
    Join Date
    Nov 2009
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    1

    Default

    I would have liked to have seen ext2 and ntfs

  6. #16
    Join Date
    Nov 2009
    Location
    Hayward, CA
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    1

    Default what?

    I wish they had specified what options were used, as there are several journalling options for the journalled fs used, and I am too lazy to go dig up the options for the os they used. I'd have like to have known if they used the ssd option for btrfs, also, I think Reiser4 (amazingly enough, people are still working on it) with it's wandering logs would have been a nice addition. UDF would be good too, for those of us who want out of the box portability.

  7. #17
    Join Date
    Mar 2009
    Location
    Hellas
    Posts
    1,054

    Thumbs up

    Quote Originally Posted by rehaby View Post
    I would have liked to have seen ext2 and ntfs
    I second to that.

  8. #18
    Join Date
    Sep 2007
    Location
    Connecticut,USA
    Posts
    962

    Default

    Quote Originally Posted by Apopas View Post
    I second to that.
    Doesn't ntfs use a journal as well? If so then as its hard to disable the journal on ntfs, it would be a poor choice for a filesystem for a flash drive or an SSD
    Last edited by DeepDayze; 11-12-2009 at 10:30 PM.

  9. #19
    Join Date
    Nov 2009
    Posts
    1

    Default

    Why did sqlite suddenly perform so well on ext4? sqlite has sucked hard from 2.6.31 and back on ext4.

    Is it because this is 2.6.32? or are barriers turned off? or some other mount option? I'd really really like to know.

    Thanks


  10. #20
    Join Date
    Jul 2008
    Location
    Germany
    Posts
    23

    Default

    I have a Class 10 SDHC card and it is slow as hell on Ubuntu 9.04 ext2.
    Problems are cron jobs, the apt-database or access to its cache by Firefox 3.5. I've thought it would easily outperform my slow 1,8" hdd but I was wrong.

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