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From Mark Deibert <mark.deib...@gmail.com>
Subject Re: Storage limitations?
Date Sun, 10 Nov 2013 22:11:30 GMT
BTW, my current code _is_ storing each comment as it's own doc, and I
already _do have_ and am using the view that is being described here. I was
just trying to figure out something more denormalized. However, Keith's
comment about the conflicts might be nail. I didn't think about that.


On Sun, Nov 10, 2013 at 5:00 PM, Mike Marino <mmarino@gmail.com> wrote:

> Hi Mark,
>
> On Sun, Nov 10, 2013 at 10:10 PM, Mark Deibert <mark.deibert@gmail.com>
> wrote:
> > Each comment is normally a very small amount of information, and id,
> > userName, a date and a small text field. Probably no more than a short
> > sentence on average. Why do I need to go through the trouble of creating
> > new comment docs for each? This totally complicates the comment read code
> > (there will 1000 reads to every 1 write, at least) both in the UI and the
> > db for no reason.
>
> I'm not sure why this should complicate the comment read code.  You
> can generate a view that emits as key the particular page/post to
> which the comment refers.  As value, you can emit either a subset of
> data you need from the comment, or simply emit "null" and call the
> view with include_docs to get all the documents for the particular
> post.  This would be a single http call.
>
> Cheers,
> Mike
>
> >
> >
> > On Sun, Nov 10, 2013 at 1:34 PM, Jens Alfke <jens@couchbase.com> wrote:
> >
> >>
> >> On Nov 9, 2013, at 11:47 AM, Robert Newson <rnewson@apache.org<mailto:
> >> rnewson@apache.org>> wrote:
> >>
> >> attachments are different to documents. They're stored as a series of
> >> binary chunks and so they can be streamed in and out, you can go large
> >> with attachments.
> >>
> >> But on the other hand, all attachments will get copied during a database
> >> compaction, so they slow down the process and require more free disk
> space.
> >> If you have many gigabytes of attachments, you might consider storing
> them
> >> externally and putting URL links in the documents.
> >>
> >> As for comments, just add new documents for each comment and use a
> >> view (https://wiki.apache.org/couchdb/HTTP_view_API,
> >> https://wiki.apache.org/couchdb/View_collation) to bring the article
> >> and comment thread together. No need to update a document that way.
> >>
> >> Yup. The guide <guide.couchdb.org<http://guide.couchdb.org>> has
a
> >> chapter-long example of a blog application that shows how to do comments
> >> this way.
> >>
> >> —Jens
> >>
>

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