> Another thing: Is the py_stress traffic definitely non-determinstic > such that each client will generate a definitely unique series of > requests?
The tests were run both with --random and --std 0.1; in both cases, the key-sequence is non-deterministic. Cheers, Dave On Jul 19, 2010, at 1:30 PM, Peter Schuller wrote: > Another thing: Is the py_stress traffic definitely non-determinstic > such that each client will generate a definitely unique series of > requests? If all clients are deterministically requesting the same > sequence of keys, it would otherwise be plausible that they end up in > effective lock-step, if the bottleneck is serialized but the result of > it goes out in parallel to all clients. > > (This is probably not the case but I'm not sure off hand about whether > there is anything in Cassandra's implementation that might be > compatible with this hypothesis, in terms of how concurrent requests > for the same key will be handled.) > > -- > / Peter Schuller
