cyrus-imapd 2.2 db3 or db4?

Lawrence Greenfield leg+ at
Wed May 7 14:43:53 EDT 2003

   Date: Wed, 7 May 2003 10:06:34 -0400 (EDT)
   From: Rob Siemborski <rjs3 at>

   > Are there any issues with skiplist and duplicate.db?  db4 (db-4.1.25) on a
   > busy server doing duplicatesuppression does not do well.  I will test
   > skiplist on a small server first or I will need to turn
   > duplicatesuppression off.

   There shouldn't be any reasons against it, no.

Well, performance. Skiplist requires two synchronous writes for every
modification, and allows only one writer at a time.

Berkeley db uses asynchronously (which is how we keep the duplicate
delivery database) can do much much better than this.


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