Fwd: why do we keep all versions

[Hermann Norpois <hn...@gmail.com>]

---------- Forwarded message ----------
From: Hermann Norpois <hn...@gmail.com>
Date: 2015-06-30 19:09 GMT+02:00
Subject: why do we keep all versions
To: user@couchdb.apache.org


Hello,

if I understood it correctly each change of a document leads to a change of
the version of the document. And each version remains in the database. This
means that the amount of data grows in dependence of changes. Is that
correct?

Thanks
Hermann

Re: Fwd: why do we keep all versions

[Hermann Norpois <hn...@gmail.com>]

Thanks. This helps.
Hermann

2015-07-02 10:13 GMT+02:00 James Dingwall <ja...@zynstra.com>:

> Hermann Norpois wrote:
>
>> Hello,
>>
>> if I understood it correctly each change of a document leads to a change
>> of
>> the version of the document. And each version remains in the database.
>> This
>> means that the amount of data grows in dependence of changes. Is that
>> correct?
>>
> Yes, this is true because of the append only database format. Old
> revisions can be removed and storage space optimised by doing a database
> is compacted.  A compaction can be triggered manually (POST to
> /db/_compact, or use Compact & Cleanup in Futon) or a rule written for
> the compaction daemon to do this automatically, see the default.ini for
> examples.
>
> James
> Zynstra is a private limited company registered in England and Wales
> (registered number 07864369). Our registered office and Headquarters are at
> The Innovation Centre, Broad Quay, Bath, BA1 1UD. This email, its contents
> and any attachments are confidential. If you have received this message in
> error please delete it from your system and advise the sender immediately.
>

Re: Fwd: why do we keep all versions

[James Dingwall <ja...@zynstra.com>]

Hermann Norpois wrote:
> Hello,
>
> if I understood it correctly each change of a document leads to a change of
> the version of the document. And each version remains in the database. This
> means that the amount of data grows in dependence of changes. Is that
> correct?
Yes, this is true because of the append only database format. Old
revisions can be removed and storage space optimised by doing a database
is compacted.  A compaction can be triggered manually (POST to
/db/_compact, or use Compact & Cleanup in Futon) or a rule written for
the compaction daemon to do this automatically, see the default.ini for
examples.

James
Zynstra is a private limited company registered in England and Wales (registered number 07864369). Our registered office and Headquarters are at The Innovation Centre, Broad Quay, Bath, BA1 1UD. This email, its contents and any attachments are confidential. If you have received this message in error please delete it from your system and advise the sender immediately.