Hi,
We are doing a benchmark test and limiting the numbers of core used by Storm.
The topology contains 1 spout and 6 bolts. The first bolt has the highest load.
Our experiment : we run the topology on one single machine with 4 cores. We
start with 1 core and then increasing to 2, 3 and 4 cores. We measure the
latency with a timestamp when the spout emits the tuple and when the tuple
reaches the last bolt.
The result : the latency results obtained from tests with 2,3 and 4 cores are
valid (as we expected - the latency results vary from 10 ms to 20 ms) however
we got strange values from the tests with only 1 core that we can’t explain.
The latency results vary from 4 ms to 120 ms.
Does anyone have any ideas why.
Thanks
Baoh
