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Date: Sat, 26 Sep 2009 00:22:11 -0700
Message-ID: <e282921e0909260022t732d7f0bhed8d1744b0617bb1@mail.gmail.com>
Subject: Re: couchdb: suitable for this type of applications ?
From: Chris Anderson <jchris@apache.org>
To: user@couchdb.apache.org
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On Fri, Sep 25, 2009 at 8:34 PM, go canal <gocanal@yahoo.com> wrote:
>>>When you compact the database it removes all but the most recent version=
 of each document.
>
>
> Does this mean that if I want to support document version feature, I can =
not compact the database ?
>

Applications should not depend on controlling compaction schedules.
Only the most recent version is replicated, so if you run in a cluster
it's like it's compacting all the time.

> Let's say I am working on a Word document, I upload it as an attachment; =
I need to have a list of all versions for this file and can download any of=
 previous version.
>
> Is this how I should model it in CouchDB:
> =A0- have a version field, not using the CouchDB _rev. update the version=
 in my application.
> =A0- when uploading the modified Word document, a doc with a different ID=
 is created. So compacting a DB will not affect them.
> =A0 =A0but how to get a list of all versions of this document ? I need to=
 use another field to identify them, for example, another application gener=
ated ID.
>
> Is this the general practice ? I am sure supporting versioning is a commo=
n request, so appreciate if you can provide some advices..
> thanks,
> canal
>
>
>


--=20
Chris Anderson
http://jchrisa.net
http://couch.io