[Discuss] Versioning File Systems

[j.natowitz at rcn.com (Jerry Natowitz)]

To quibble a bit:

You would only have 11 copies if the versioning file system didn't support generation limits, or the generation limit was 11 or higher.

I worked with RSX11M for most of the first decade of my career, and I found the following to be my friend:

PIP *.*/PU:2




---- Original message ----
>Date: Thu, 03 May 2012 14:33:44 -0400
>From: discuss-bounces+j.natowitz=rcn.com at blu.org (on behalf of Richard Pieri <richard.pieri at gmail.com>)
>Subject: [Discuss] Versioning File Systems  
>Cc: discuss at blu.org
>
>On 5/3/2012 12:13 PM, Gordon Ross wrote:
>> No, but combined with an auto-snapshot service, I'd call it "close".
>> You would not get a new version on every file change, but one can
>> make snapshots pretty frequently, i.e. every few minutes.
>> Anyway, probably getting off topic here.  Sorry.
>
>Not off topic for the list so I'll change the Subject.
>
>Snapshots aren't at all close to versioning.  A versioning file system 
>keeps (or can keep; one can usually configure how many versions to keep) 
>every version of a file saved.  File system snapshots get the file 
>system state when the snapshots are made.
>
>For example: create a ZFS snapshot.  Create a file.  Edit it and save 
>it.  Repeat nine more times.  Create another snapshot.  How many 
>versions of the file do you have?  You would have just one on ZFS.  You 
>would have all eleven on a versioning file system.
>
>-- 
>Rich P.
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