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From Apache Wiki <>
Subject [Couchdb Wiki] Update of "Document_revisions" by JanLehnardt
Date Wed, 23 Nov 2011 15:11:20 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Couchdb Wiki" for change notification.

The "Document_revisions" page has been changed by JanLehnardt:

add ContributorGroup link

+ <<Include(EditTheWiki)>>
  == Overview ==
  CouchDB does not overwrite updated documents in place, instead it creates a new document
at the end of the database file, with the same `_id` but a new `_rev` identifier. This type
of storage system is space-wasteful so regular [[Compaction]] is needed to reclaim disk space.
Note that the older revisions are not available to [[Views]].

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