John P. Hartmann wrote : > On 12 August 2010 10:08, Colin Allinson <[email protected]> wrote: > > c) Very occasionally 2 servers would be doing exactly the same thing > > at the same time so they would clash.
> No easy solution here. You'll have to put a lock on the file and then > figure out what to do when the lock is held, particularly when the > lock is held, but the program that took the lock crashed for one > reason or another (or [shudder] you lost power). > j. Sure, I guess there are things that could be done to make a clash even less likely than it is now but, from my perspective, it is not really a problem working with what we have now. Armed with the understanding of what is happening it is not really that difficult to code round these issues. The main reason I mentioned it was that, with my very busy servers, it was happening once or twice a day. However, in a less intense environment, it may happen once in a blue moon and be difficult to diagnose. Colin Allinson VM Systems Support Amadeus Data Processing GmbH
