I run a large-scale courier based IMAP-site - and we have a steady growth in header-searches (mostly for self-defined X-SOME-NAME: some-value). On the same time these folders are increasing in size and number of messages.
I presume this is kind of difficult since IMAP's protocol defines a match for a search as a substring of the valuefield:
SEARCH HEADER My-Field MyValue
so a SEARCH in My-Field for al, My og MyValue would all match, hence hashing or other techniques won't work - at least not for a substring - thus breaking the protocol if implemented this way.
Does courier implement any [propitary] indexes?
Do anybody know of an IMAP server that can make use of a back-store in a database or the likes, giving faster searching, and a IMAP capable front?
Thanks in advance, Dave
-- David J. M. Karlsen - +47 90 68 22 43 http://www.davidkarlsen.com http://mp3.davidkarlsen.com
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