05-06-2013, 05:31 AM
broker specs are solid, although more ram may be needed if you ever decide to use all 32 GPUs. you won't be able to use very high -n values with that "little" ram.
you're on ethernet, so you're guaranteed to be network-bound. but your network issues should mostly be latency related, not bandwidth related. infiniband latencies are 1/100th of ethernet latencies.
this should be easy to test: just throw a ton of work at the cards and monitor the bandwidth. if your pipes are saturated and you're not achieving full acceleration, then bandwidth is the problem. if your pipes aren't saturated but you're still not achieving full acceleration, then latency is the problem.
test with different algorithms, different attack modes, etc. you will get different results for various combinations of each.
you're on ethernet, so you're guaranteed to be network-bound. but your network issues should mostly be latency related, not bandwidth related. infiniband latencies are 1/100th of ethernet latencies.
this should be easy to test: just throw a ton of work at the cards and monitor the bandwidth. if your pipes are saturated and you're not achieving full acceleration, then bandwidth is the problem. if your pipes aren't saturated but you're still not achieving full acceleration, then latency is the problem.
test with different algorithms, different attack modes, etc. you will get different results for various combinations of each.