[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [leafnode-list] File locking
On Thu, 7 Oct 1999, Cornelius Krasel wrote:
> Lockfiles are used in Leafnode to avoid race conditions with respect
> to the groupinfo file. That is, only one application that modifies
> the groupinfo file can run at a time (i.e. fetch, texpire and applyfilter
> are mutually exclusive).
> However, if we want to implement local groups there will be a problem,
> because the nntpd itself will have to modify the groupinfo file. It would
> be quite stupid (IMO) if the nntpd would also use the current locking
> mechanism because this would make it impossible to run fetch (or any
> other program) in the background while reading news. Therefore, it would
> be important to come up with a different solution. I have thought quite
> hard about this, but have not come up with a good idea.
> Any of the geeks out there who can help me?
Is there a compelling reason why groupinfo has to be a file? Locking at
the whole-file level isn't very granular. When I encounter situations
such as this I immediately start to think "database".
Brent J. Nordquist <brent-nordquist@xxxxxxxxxx>
W: +1 651 638-6136
leafnode-list@xxxxxxxxxxxxxxxxxxxxxxxxxxxx -- mailing list for leafnode
To unsubscribe, send mail with "unsubscribe" in the subject to the list