> What we do at FastMail to make deliver.db not suck is store it on tmpfs.  The 
> repack is tons faster.  Sure you lose it over a full server restart, but all 
> you lose is the duplicate suppression.  If you wanted to be really clever 
> about it, you could copy the file during the shutdown script and maybe once 
> per hour otherwise, and copy it back onto tmpfs during startup.
> 
> duplicate_db_path: /var/run/cyrus/duplicate.db

oh right, 2.3.x doesn't have duplicate_db_path.

I think your choices are either to hack that option into your codebase so that 
you can move the duplicate DB onto tmpfs, live with what you've got (possibly 
by putting /var/imap on fast disk/SSD), or upgrade to a Cyrus that isn't 10 
years old!

Bron.

-- 
  Bron Gondwana
  br...@fastmail.fm
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