[GitHub] [hadoop-ozone] runzhiwang opened a new pull request #1034: HDDS-3749. Improve OM performance with 3% by avoid stream.collect

Mon, 08 Jun 2020 00:22:19 -0700 


runzhiwang opened a new pull request #1034:
URL: https://github.com/apache/hadoop-ozone/pull/1034


   ## What changes were proposed in this pull request?
   
   I start a ozone cluster with 1000 datanodes and 10 s3gateway, and run two 
weeks with heavy workload, and perf om. There are 3 places use stream.collect 
which cost 3% cpu.
   
   1. stream.collect in Pipeline::getFromProtobuf
   
![image](https://user-images.githubusercontent.com/51938049/84002528-255b8000-a99b-11ea-9aed-25f5fd8eaa92.png)
   
   2. stream.collect in OmKeyInfo::getProtobuf
   
![image](https://user-images.githubusercontent.com/51938049/84002623-4cb24d00-a99b-11ea-8acb-e485efcba658.png)
   
![image](https://user-images.githubusercontent.com/51938049/84002730-74091a00-a99b-11ea-9da6-046a3145d01d.png)
   
   3. stream.collect in OMKeyCommitRequest::validateAndUpdateCache
   
![image](https://user-images.githubusercontent.com/51938049/84002874-b5012e80-a99b-11ea-89fb-0df6fb731e5b.png)
   
   
   ## What is the link to the Apache JIRA
   
   https://issues.apache.org/jira/browse/HDDS-3749
   
   ## How was this patch tested?
   
   Existed tests.
   


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