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RE: Re: revision numbering (was: Re: Multiple projects in one repository!)

From: Bill Tutt <rassilon_at_lyra.org>
Date: 2002-05-03 23:08:04 CEST

NodeRevisionIDs as discussed in libsvn_fs/structure are changing soon.
See http://subversion.tigris.org/issues/show_bug.cgi?id=654 for more
information as to why.

The new way to identify "NodeRevisions" is by (NodeID, TransactionID).

NodeID is a monotonically increasing integer. However, due to the
funky-ness in O(1) copy support you aren't guaranteed to keep the same
NodeID forever for a given path.

Yes, this is odd, but SVN is very storage/time efficient for some of
it's operations and this causes interesting things to fall out in the
data model.... :)

Bill

> -----Original Message-----
> From: Glenn A. Thompson [mailto:gthompson@cdr.net]
> Sent: Friday, May 03, 2002 12:18 PM
> To: Subversion Dev list
> Subject: Re: revision numbering (was: Re: Multiple projects in one
> repository!)
>
> Hey Guys:
>
> Isn't the real juice in the NodeRevisionIDs?
> Nodes are forever Right? Deleted for not they are forever Right?
> I guess I assumed, or (read and forgot; so now I assume), that in
terms of
> a
> unique identity to the world at large it would have to be something
like
> "Unique ReposID".NodeRevisionID.
> I view the Revision number as something that can be reset at will.
The
> export
> import process does that right?
> I wasn't paying close attention to the import/export thread. Does it
lose
> NodeRevisionIDs?
>
> I'm still spinning up, so go easy on me.
> FYI, I prefer to be beaten down with a wooden bat. No aluminum please.
>
> Thanks,
> gat
>
>
>
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Received on Fri May 3 23:34:47 2002

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