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This is my effort to create a unionfs filesystem implementation which is probably slower but way more flexible than the current in-kernel unionfs solution. Currently it's almost fully usable, will only minor convenience issues to be fixed... This is my effort to create a unionfs filesystem implementation which is probably slower but way more flexible than the current in-kernel unionfs solution.
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 * Advanced features like copy-on-write and more
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 * Compared to kernel-space solution we need lots of useless context switches which makes kernel-only solution clear speed-winner  * Compared to kernel-space solution we need lots of useless context switches which makes kernel-only solution clear speed-winner (well, actually I've made some tests and the hard-drives seem to be the bottleneck so the speed is fine, too)
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== TODO ==

 * Add support for choice which roots are read-only and which are not
 * Add cache controls
 * Handle writing to /stats intelligently

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 * Latest version: 0.17 (released 2007-02-09)  * Latest version: 0.18 (released 2007-08-09)
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If
you want to follow the development closely, see my mercurial repository at:

 *
http://hg.podgorny.cz/unionfs-fuse
 * Repository location: http://hg.podgorny.cz/unionfs-fuse (Mecurial)

unionfs-fuse

This is my effort to create a unionfs filesystem implementation which is probably slower but way more flexible than the current in-kernel unionfs solution.

I'm open to patches, suggestions, whatever (at radek@podgorny.cz)...

If you've sent me something and think it takes me too long to answer, go check UndeliverableMail page. I might have problems sending mail to you...

Why choose this stuff

  • The filesystem has to be mounted after the roots are mounted when using the standard module. With unionfs-fuse, you can mount the roots later and their contents will appear seamlesly
  • You get caching which speeds things up a lot for free
  • You get nice stats (optional)
  • Advanced features like copy-on-write and more

Why NOT choose it

  • Compared to kernel-space solution we need lots of useless context switches which makes kernel-only solution clear speed-winner (well, actually I've made some tests and the hard-drives seem to be the bottleneck so the speed is fine, too)

Donation

If you use the software and like it, please consider a donation (provided by PayPal)...

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