File versions and ZFS

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Re: File versions and ZFS

Post by chriswayg » Wed Nov 07, 2012 2:28 am

Do you know the exact folder in Library (~/Library) where other Versions related files are stored?

I've been able to trace most versions related files and file history by looking at the /.DocumentRevisions-V100 using a root account. But there is no /.DocumentRevisions-V100 on a ZFS volume, thus some information is obviously stored somewhere else.

Additionally 'permanent version storage' as Apple calls it is not quite permanent even on HFS+ volumes. Moving files within the same volume retains the history, but once you move or copy a versioned file to another HFS+ partition all the version history is lost (in my experience). I have found no information from Apple about this, and I think this is a serious shortcoming. Have you noticed the same thing?
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~/Library/Containers

Post by grahamperrin » Wed Nov 07, 2012 3:30 am

ZFS aside

If I recall correctly … for file systems that do not support permanent version storage, versions may be stored in subdirectories of:

~/Library/Containers

If you browse that area, please be very careful to change nothing.

To preview the content of any file in that area:

  • use the Space bar for Quick Look
  • avoid opening files; confusion may follow.

See what happens in Mountain Lion when Finder moves a versioned file:

  • from local JHFS+
  • to an AFP server.

I'm conscious that we're straying from stuff that's specific to ZFS, so if you have any general questions about the OS X implementation of versions, I'll encourage those questions in Ask Different.
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losing and regaining warnings

Post by grahamperrin » Fri Nov 09, 2012 2:43 am

How to regain warnings about permanent version storage?

If ever you lose the warnings, there's an answer.
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Re: permanent version storage

Post by grahamperrin » Sun Jul 21, 2013 3:45 am

To anyone who would like Apple to allow permanent version storage on ZEVO ZFS:


My own follow-up, to an existing report, has been given privately.
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