AW: File versioning (was: Big 7.1 open items)

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От Zeugswetter Andreas SB
Тема AW: File versioning (was: Big 7.1 open items)
Дата
Msg-id 219F68D65015D011A8E000006F8590C605BA5992@sdexcsrv1.f000.d0188.sd.spardat.at
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Hiroshi Inoue [mailto:Inoue@seiren.co.jp] wrote:
> > > Besides which, OID alone doesn't give us a possibility of file
> > > versioning, and as I commented to Vadim I think we will want that,
> > > WAL or no WAL.  So it seems to me the two viable choices are
> > > unique-id or OID+version-number.  Either way, the 
> file-naming behavior
> > > should be the same across all platforms.
> > 
> > I do not think the only problem of a failing rename of 
> "temp" to "new" 
> > on startup rollforward is issue enough to justify the additional 
> > complexity
> > a version implys.
> 
> Hmm,I've always mentioned about usual rollback and never mentioned
> about rollforward on this topic AFAIR. Could you tell me what you mean
> by * on startup rollforward* ?

situation:
$ alter table ...

db crash before rename is done but rest was ok.

$ startup

rollforward tx log which has the open entry for the rename table

Andreas 


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