Tony Finch wrote:
>> http://sourceforge.net/projects/tdb/
>>and Exim supports it. But whether that would actually help in practice,
>>I don't know.
>
>
> The crucial feature is multiple symultaneous readers and writers (i.e. row
> locking rather than table locking, to use RDBMS terminology). Since tdb
> supports that then it should (hopefully) give us the improvement we want.
> An extended version of Exim's DB abstraction layer could support
> concurrent access with tdb and recent Berkeley DB.
Sounds like a job for the cold spare :) I might give it a go sometime
over the next week or so, assuming of course that the current problems
(non-exim related) go away so I'm not chasing around after those.