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From svilen ...@svilendobrev.com>
Subject Re: following fast doc updates
Date Tue, 25 Sep 2012 20:21:42 GMT
just building a log-of-changes may or may not be enough, depends on
your what docs represent.

there is some "revisioning" here:
http://blog.couchbase.com/simple-document-versioning-couchdb
basically keeping all revisions as attachments.

have fun

ciao
svil


On Tue, 25 Sep 2012 14:02:09 -0500
Paul Davis <paul.joseph.davis@gmail.com> wrote:

> Alternatively, you could use two dbs. One db you could write "change
> requests" to (each request as a new doc) and then listen for changes
> on that and apply them in that logic. This also has that added benefit
> that you could do the timestamped dbname pattern for your changes feed
> dbs to (possibly depending on use case) remove some of the cruft
> buildup.
> 
> On Tue, Sep 25, 2012 at 1:31 PM, Mark Hahn <mark@hahnca.com> wrote:
> >> The _changes feed only ever shows leaf revisions
> >
> > AARRGGHH.  I am so screwed.  I have been working on a scheme that
> > relies on tracking every change.  And as everyone knows there is
> > normally no way to find out what changed in a doc.  I am going to
> > have to add a history of changes to each doc which it not only
> > wasteful, but a pain to implement.
> >
> > Thanks for taking the trouble to give me bad news.
> >
> >
> > On Tue, Sep 25, 2012 at 10:19 AM, Adam Kocoloski
> > <kocolosk@apache.org>wrote:
> >
> >> On Sep 24, 2012, at 5:16 PM, Mark Hahn <mark@hahnca.com> wrote:
> >>
> >> > If I update a particular doc multiple times rapidly, is each
> >> > update guaranteed to show up in a continuous changes feed?  I am
> >> > worried that
> >> the
> >> > change feed will be optimized to just show the latest value of a
> >> > doc with multiple updates.  This would break my logic.
> >>
> >> Your worries are justified.  The _changes feed only ever shows leaf
> >> revisions (i.e., latest updates to branches of the edit tree).
> >> Regards,
> >>
> >> Adam

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