2011/12/23 Paul Davis <[email protected]>: > On Thu, Dec 22, 2011 at 7:00 PM, Jens Alfke <[email protected]> wrote: >> >> On Dec 22, 2011, at 1:44 PM, Chris Stockton wrote: >> >> Okay, so this catches me a bit off guard, always thought compaction >> cleaned those up. >> >> Compaction removes old revisions’ and deleted documents’ contents, but their >> revision histories are still there. Those should be pretty small, though, >> since they’re just trees of revision IDs. >> >> (Unless you did delete the docs by just setting a “_deleted” attribute? I >> don’t know what the behavior of that would be; sounds like it doesn’t >> actually delete the document from the database, in which case maybe the last >> revision data does get left behind.) >> >> —Jens > > Deleted documents specifically allow for a body to be set in the > deleted revision. The intention for this is to have a "who deleted > this" type of meta data for the doc. Some client libraries delete docs > by grabbing the current object blob, adding a '"_deleted": true' > member, and then sending it back which inadvertently (in most cases) > keeps the last doc body around after compaction.
Can I write these informations in the wiki? I think it would be very useful in http://wiki.apache.org/couchdb/Compaction and in http://wiki.apache.org/couchdb/FUQ Marcello
