Thanks for your reply, that was very interesting and helpful!--On 15. Februar 2018 um 16:12:23 +0100 Robert Stepanek <rsto@xxxxxxxxxxxxxxxx> wrote:
Just out of curiosity, how is the mapping between a Xapian docid and a message file on disk achieved? I played around with xapian-delve and the Perl example simplesearch.pl. When I search a term, I get a list of docid's, but how do I know which message that is?In 3.x, Cyrus search stores an internal unique message id, called guid, as docid in Xapian. The guid currently is a SHA-1 hash of the raw message, allowing for deduplication and to avoid re-indexing already seen messages. The conversations.db of a user maps this guid to a list of mailbox:UID pairs. Off the top of my head, there currently isn't an "official" way in Cyrus to retrieve the mailbox:UID list for a given guid outside the Cyrus process. Depending on your use case, you could either: 1.) build your custom mapper on imap/conversations.h, 2.) use cvt_cyrusdb to dump the contents of a conversations.db into plain text.
FWIW, that conversion is so "lossy" as to be useless. But it was really only curiosity, so it doesn't matter.
Cheers,
Sebastian
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