[jira] [Created] (STORM-297) Storm Performance cannot be scaled up by adding more CPU cores

["Sean Zhong (JIRA)" <ji...@apache.org>]

Sean Zhong created STORM-297:
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             Summary: Storm Performance cannot be scaled up by adding more CPU cores
                 Key: STORM-297
                 URL: https://issues.apache.org/jira/browse/STORM-297
             Project: Apache Storm (Incubating)
          Issue Type: Bug
            Reporter: Sean Zhong
             Fix For: 0.9.2-incubating


We cannot scale up the performance by adding more CPU cores and increasing parallelism.

For a 2 layer topology Spout ---shuffle grouping--> bolt, when message size is small (around 100 bytes), we can find in the below picture that neither the CPU nor the network is saturated. When message size is 100 bytes, only 40% of CPU is used, only 18% of network is used, although we have a high parallelism (overall we have 144 executors)



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