Hi, I'm experiencing some rather strange behavior from memcache. I think I'm getting different data back from memcache using the same key The issue I see is that when putting load on our application, even simple memcache queries are starting to return inconsistant data. When running the same request from multiple threads, I get different results. I've made a very simple example, that runs fine on 1-200 threads, but if I put load on the app (with some heavier requests) just before I run my test, I see different values coming back from memcache using the same keys.
def get_new_memcahce_value(key, old_value): old_val = memcache.get(key) new_val = uuid.uuid4().get_hex() reply = 'good' if old_val and old_value != "": if old_val != old_value: reply = 'fail' new_val = old_value else: if not memcache.set(key, new_val): reply = 'set_fail' else: reply = 'new' if not memcache.set(key,new_val): reply = 'set_fail' return (new_value, reply) and from a server posting requests: def request_loop(id): key = "test:key_%d" % id val, reply = get_new_memcahce_value(key, "") for i in range(20): val,reply = get_new_memcahce_value(key, val) Is memcache working localy on a cluster of servers, and if an application is spawned over more clusters, memcache will not propergate data to the other clusters? I hope someone can clarify this, since I can't find any post regarding this issue. Is there some way to get the application instance ID, so I can do some more investigation on the subject? Thanks Kim --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---