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Ext4 is Coming!

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  • Michael
    started a topic Ext4 is Coming!

    Ext4 is Coming!

    Given the recent discussion on LKML two weeks ago, it is clear that many people feel they have a stake in the future development plans of the ext2/ext3 filesystem, as it one of the most popular and commonly used filesystems, particular amongst the kernel development community. For this reason, the stakes are higher than it would be for other
    filesystems. The concerns that were expressed can be summarized in the following points:
    http://lkml.org/lkml/2006/6/28/454

  • Michael
    replied
    I haven't had the time to try out ex4 yet, but if Fedora Core 7 is going to adopt EXT4 for the default format that must mean something about the rate at which it is progressing.

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  • BrowneR
    replied
    im still using ext2 on my slow laptop hard drive. went for that over ext3 to loose the journalling overheads and hopefully gain some speed.

    i was tempted to try something more exotic (reiser,xfs) although its reassuring to use a mature and well supported fs with plenty of tools available. hopefully ext4 will mature to the same standards.

    i may be paranoid but after an incident a few years back, data loss really scares me

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  • joshuapurcell
    replied
    Looks like a developmental version of ext4 is included in today's release of the newest kernel: 2.6.19

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  • 1c3d0g
    replied
    I'm pretty excited about ext4...hopefully they'll focus more on stability once it goes into the kernel.

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  • Michael
    replied
    A test version of Ext4 has now been released.

    The experimental version has also been added to the 2.6.19 test kernel (see here).

    If you want more information, there is a short write-up at Linux Watch.

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  • Ethyriel
    replied
    Originally posted by Shadewalker
    I've been through a series of "dirty unmounts" and usually the worst thing that happened was that the partition wouldn't mount again before doing 'reiserfsck --rebuild-tree'. One time something weird happened which caused my /etc/passwd to disappear. Fortunately, there's always a local backup.

    I'm strongly considering trying out JFS and/or XFS (especially JFS) at the moment. Anyone familiar with those? I've read some benchmarks and JFS looked appealing in particular.
    Well, I'm using XFS and it feels just as fast as Reiser3, if not faster. I only use ext2 for my /boot, everything else is XFS now. Yes, I do feel that ext3 is slower, but it's just my perception.

    Linux filesystems not needing to be defragmented is pretty much a myth, but XFS's extents are so well implemented you can literally go 5 or 6 years on a high availability file server with almost no file fragmentation. I guess Reiser4 has similarly advanced extents, but it's reliability really isn't there yet.

    Overall I feel more secure with it, but that also is impossible to quantify. However, I have an older system (over 6 years now) which has a tendency to hard freeze when I push it way too hard, so I have quite a few dirty unmounts. I haven't had any issues with XFS yet in about 6 months.

    I haven't tried JFS, yet, but it's on my list. I'd also love to start playing with ZFS, but I suppose I'll need to install Solaris for that. I haven't gotten past downloading it, just yet.

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  • Shadewalker
    replied
    Originally posted by Ethyriel
    Well, it was a dirty unmount, but I've run into people since then who had the same thing happen. Dirty unmounts happen, things like this shouldn't. Especially with a journal to replay.
    I've been through a series of "dirty unmounts" and usually the worst thing that happened was that the partition wouldn't mount again before doing 'reiserfsck --rebuild-tree'. One time something weird happened which caused my /etc/passwd to disappear. Fortunately, there's always a local backup.

    I'm strongly considering trying out JFS and/or XFS (especially JFS) at the moment. Anyone familiar with those? I've read some benchmarks and JFS looked appealing in particular.

    Leave a comment:


  • Ethyriel
    replied
    Originally posted by Shadewalker
    Ouch, how'd that happen?
    Well, it was a dirty unmount, but I've run into people since then who had the same thing happen. Dirty unmounts happen, things like this shouldn't. Especially with a journal to replay.

    Leave a comment:


  • Shadewalker
    replied
    Originally posted by Ethyriel
    I gave up on Reiser ever since my Reiser3 filesystem at home started remapping files to directories.
    Ouch, how'd that happen?

    Leave a comment:

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