On Wed, 26 Apr 2006, Francesco Pasqualini wrote:
> what is the correct way to update a dbm (Berkley db usually) lookup db while
> exim is running?
Make a new file, and move it into place using "mv".
> I will use the perl interface to DB_File, do I need to aquire a lock or
> something else to assure that exim4 does not read incorrect information
> while updating the db ?
As Exim is only reading these files in lookups, it doesn't use any
locking.
> Is it safe to rebuild a db with the exim_dbmbuild utility ?
Yes, because exim_dbmbuild makes a new file and then renames it.
> What appen if exim do a lookup while the utility is running ?
It should be OK, because the operating system should ensure integrity
for a rename operation. Either it will see the old file, or it will see
the new one.
--
Philip Hazel University of Cambridge Computing Service
Get the Exim 4 book: http://www.uit.co.uk/exim-book
