database types

[Iain Stevenson]

There has recently been a short discussion on the list about this - cones 
down to efficiency issues.  Not using db4 would seem also to eliminate 
warnings about "lockers".  I'd be more worried about migration issues from 
one sort of database to another.  Last time I tried modifying the database 
structure of my Cyrus installation I lost a considerable amount of mail.

  Iain




--On Saturday, October 12, 2002 2:53 pm -0700 David Wright 
<ichbin at shadlen.org> wrote:

> Henrique, who maintains the Debian cyrus-imap packages (and does a very
> good job of it) just changed the MBOX and SEEN databases to use skiplist
> (from db3 and flat). I had never thought about this issue before.
>
> Can someone explain what advantages and disadvantages one has from the
> different database types? And what is a skiplist anyway? I'm familiar
> with flat files and the sleepycat databases, but I've never heard of a
> skiplist.
>