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From Daniel Shahaf <...@daniel.shahaf.name>
Subject Re: svn commit: r1716548 - /subversion/trunk/subversion/tests/libsvn_fs/fs-test.c
Date Sat, 28 Nov 2015 16:55:58 GMT
Philip Martin wrote on Fri, Nov 27, 2015 at 09:27:40 +0000:
> Daniel Shahaf <d.s@daniel.shahaf.name> writes:
> 
> > Philip Martin wrote on Thu, Nov 26, 2015 at 13:46:39 +0000:
> >> I suppose one way to fix this would be to ensure that every BDB revision
> >> generates a new node-revision-id.
> >
> > I wouldn't call this a fix; I think it is a workaround.  A "fix" would
> > be to figure out why bdb reports the wrong revision number, not to make
> > the place it wrongly looks the value up in contain the right value.
> 
> I don't understand whay you want.  BDB does not store the base revision
> in the txn, it stores the base node-revision-id instead.  Revisions
> usually map 1:1 to the base node-revision-ids but the editor drive
> "begin_txn, commit" breaks this because it creates a revision that
> shares the base node-revision-id with the previous revision.  My patch
> makes the mapping 1:1 so storing the node-revision-id works.
> 

The tree layer assumes the DAG layer never shares root noderevs among
revisions.  That assumption is false.  You proposed to make the DAG
layer meet the assumption.  I proposed to make the tree layer not make
the assumption.


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