[GitHub] [hadoop-ozone] runzhiwang opened a new pull request #1028: HDDS-3735. Improve the performance of SCM with 0.78% by decrease the times of lock and unlock

[GitBox]

runzhiwang opened a new pull request #1028:
URL: https://github.com/apache/hadoop-ozone/pull/1028


   
   ## What changes were proposed in this pull request?
   
   I start a ozone cluster with 1000 datanodes, and run two weeks with heavy 
workload, and perf scm.
   lock and unlock in NodeStateMap.getNodeInfo cost 0.78% cpu because of so 
many datanodes.
   
   we can getNodeInfo by batch to decrease the times of lock and unlock 
   
   
![](https://issues.apache.org/jira/secure/attachment/13004914/13004914_screenshot-1.png)
   
   
   
   ## What is the link to the Apache JIRA
   
   https://issues.apache.org/jira/browse/HDDS-3735
   
   ## How was this patch tested?
   
   Existed UT and IT


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