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Noupdate Clause
Message
De
30/12/2009 12:49:29
 
 
À
26/12/2009 17:59:46
Dragan Nedeljkovich
Now officially retired
Zrenjanin, Serbia
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Titre:
Versions des environnements
Visual FoxPro:
VFP 9 SP2
Divers
Thread ID:
01440702
Message ID:
01441268
Vues:
40
>>Would using files with the USE ... NOUPDATE clause make access to those files faster in a multi-user network environment?
>
>It did once, back in the time of XT and 286 machines, and generally should work today as well, because it eliminates locking. Those who don't write to a file, don't require locks, and the network has that much less overhead. I don't know how much, though, as a lock is just a few packets travelling between a WS and the file server (request, response) and the server checking somewhere in the file's map whether the lock can be granted or not, and writing an entry when a lock is put (and erasing it when unlocking), plus some signalization about dirty old buffers. But in a tight spot this may help some. YMMV, I guess.

Thanks for the info.
In the End, we will remember not the words of our enemies, but the silence of our friends - Martin Luther King, Jr.
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