Hey all, I'm looking for suggestions on how to tackle distributed locking across several Python programs on several different machines.
- the objects to be locked are uniquely identified by an integer - I need "one at a time" semantics for the lock: zero or one read- writer at any point - the operations to be performed on the objects are strictly limited in duration (no more than 10 seconds) As the operations have a maximum duration, my ideal solution would be to lock the objects, and have them automatically unlock after some time period even if the original lock-holder doesn't release them. I'm currently playing with memcached as a locking mechanism as it's simplicity and timeout fit my requirements well. There is a check-and-set operation which atomically writes new data iff the existing value hasn't been changed since we last looked. However, their CAS operation doesn't handle the case of a non-existent key.. Does anyone have suggestions on how I can do distributed locking to take advantage of the time limit on operations? Many thanks, James -- http://mail.python.org/mailman/listinfo/python-list
