A Journaling File System Coming?

in General Discussion edited January 2014
There is an Apple Monster.com job listing for a "File Systems Engineer"[/URL] says in part:

[quote] Required Experience:

* Detailed knowledge of journaling file systems and low level operating system architectures such as UNIX internals and kernels.


Edit: Damned stupid long URL glitch.

[ 02-21-2002: Message edited by: glurx ]</p>


  • Reply 1 of 8
    applenutapplenut Posts: 5,768member
    I hope so. BeOS has an amazing journaling file system.
  • Reply 2 of 8
    crusadercrusader Posts: 1,129member
    :::jhtrih politely puts forth a question for all infidels on AI:::

    "Ahem, what is a "journaling file system"?"
  • Reply 3 of 8
    buonrottobuonrotto Posts: 6,368member
    <a href="http://www.webopedia.com/TERM/J/journaled_file_system.html"; target="_blank">Here's a neat little answer for ya. </a>
  • Reply 4 of 8
    glurxglurx Posts: 1,031member
    <a href="http://searchhp.techtarget.com/sDefinition/0,,sid6_gci284007,00.html"; target="_blank">HP says</a>:

    [quote] A journaling file system is a fault-resilient file system in which data integrity is ensured because updates to directories and bitmaps are constantly written to a serial log on disk before the original disk log is updated. In the event of a system failure, a full journaling filesystem ensures that the data on the disk has been restored to its pre-crash configuration. It also recovers unsaved data and stores it in the location where it would have gone if the computer had not crashed, making it an important feature for mission-critical applications.

  • Reply 5 of 8
    bellebelle Posts: 1,574member
    A little more evidence from an interview with Brett Halle - Apple's Director of Core OS Engineering - over at <a href="http://www.theregister.co.uk"; target="_blank">The Register</a>:

    [quote]Has Apple plans to devise a new file system, maybe one with journaling capabilities?

    "Well journaling-like qualities are certainly needed - drives get larger and larger and it's an issue for scaling that affects everyone. Whether you're using a portable, or if you're going to use it as a digital hub handling MP3s, or whether you're handling gigabytes of video.

    "[Marshall] McCusick has done some work to on that to ensure that it is internally consistent without being a new file system. He had a session on that here, and it achieves some of the goals. There are some really interesting options.

    "But right now we use BSD vfs for everything - we have a number of file-system plug-ins for UFS, for NFS, for HFS+"

    So it's all, all vfs underneath?

  • Reply 6 of 8
    Apple should have a journal file system sometime around 2005.
  • Reply 7 of 8
    What Apple (Mac OS X) needs is <a href="http://www.sgi.com/software/xfs/overview.html"; target="_blank">xfs</a>.

    [ 02-23-2002: Message edited by: /mandolux/ ]</p>
  • Reply 8 of 8
    crusadercrusader Posts: 1,129member
    Ah, I feel enlightened
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