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Xiaoqiao He commented on HDFS-14882: ------------------------------------ Thanks [~pifta] for your suggestions, [^HDFS-14882.suggestion] is more graceful changes in my opinion and we could reduce the double sort overhead. Just one concerned, I am not sure if we have another overhead about {{Collections.shuffle(list)}}. BTW, {{KeyInputStream.java}} seems a class of ozone project, may be an unexpected change. > Consider DataNode load when #getBlockLocation > --------------------------------------------- > > Key: HDFS-14882 > URL: https://issues.apache.org/jira/browse/HDFS-14882 > Project: Hadoop HDFS > Issue Type: Improvement > Components: namenode > Reporter: Xiaoqiao He > Assignee: Xiaoqiao He > Priority: Major > Attachments: HDFS-14882.001.patch, HDFS-14882.002.patch, > HDFS-14882.003.patch, HDFS-14882.004.patch, HDFS-14882.005.patch, > HDFS-14882.006.patch, HDFS-14882.007.patch, HDFS-14882.008.patch, > HDFS-14882.suggestion > > > Currently, we consider load of datanode when #chooseTarget for writer, > however not consider it for reader. Thus, the process slot of datanode could > be occupied by #BlockSender for reader, and disk/network will be busy > workload, then meet some slow node exception. IIRC same case is reported > times. Based on the fact, I propose to consider load for reader same as it > did #chooseTarget for writer. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org