Re: [Exim] dbm updates

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Szerző: Jim Knoble
Dátum:  
Címzett: exim-users
Tárgy: Re: [Exim] dbm updates
Circa 2001-Jun-15 14:13:28 +0100 dixit Phil Chambers:

: I am concerned about the procedure for updating the dbm files used
: by exim when they are the .pag/.dir type. Using exim_dbmbuild the
: new files are built and then renamed. Since the renaming is not an
: atomic action there will be a period where the .dir file is new and
: the .pag file is old. As far as I can see exim does not take any
: steps to prevent this. [...]
:
: I see that exim_dbmbuild makes no provision for restoring the old
: .dir file after it has been replaced if the rename of the .pag file
: files. It seems very very unlikely that this would happen but ...

These are two reasons not to use plain ndbm-style databases. I
recommend the use of CDB databases instead.

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jim knoble | jmknoble@??? | http://www.jmknoble.cx/
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