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Chao Sun edited comment on HDFS-14406 at 4/18/19 5:15 PM: ---------------------------------------------------------- Thanks [~xuel1]. A few comments on patch v5 beside the above mentioned: 1. Why {{addDeferredProcessingTime}} is added in the new patch? in {{updateMetrics}} it is called even when {{deferredCall}} is false. In {{updateMetrics}} it is called twice. 2. {{String.format}} is used in {{addProcessingTime}}, which sits in a hot path. Should we be concerned about the potential performance impact? 3. Like mentioned above, I think we need to implement {{RpcUserMetrics}} better. It is sharing a fair amount of code with {{RpcDetailedMetrics}}, and seems having a separate class for this doesn't bring much benefit. Some of the branchings are not necessary, such as: {code:java} if (enableRpcUserMetrics) { ((RpcUserMetrics)rpcDetailedMetrics).shutdown(); } else { this.rpcDetailedMetrics.shutdown(); } {code} 4. Can we put else in the same line as the previous }? was (Author: csun): Thanks [~xuel1]. A few comments beside the above mentioned: 1. Why {{addDeferredProcessingTime}} is added in the new patch? in {{updateMetrics}} it is called even when {{deferredCall}} is false. In {{updateMetrics}} it is called twice. 2. {{String.format}} is used in {{addProcessingTime}}, which sits in a hot path. Should we be concerned about the potential performance impact? 3. Like mentioned above, I think we need to implement {{RpcUserMetrics}} better. It is sharing a fair amount of code with {{RpcDetailedMetrics}}, and seems having a separate class for this doesn't bring much benefit. Some of the branchings are not necessary, such as: {code:java} if (enableRpcUserMetrics) { ((RpcUserMetrics)rpcDetailedMetrics).shutdown(); } else { this.rpcDetailedMetrics.shutdown(); } {code} 4. Can we put else in the same line as the previous }? > Add per user RPC Processing time > -------------------------------- > > Key: HDFS-14406 > URL: https://issues.apache.org/jira/browse/HDFS-14406 > Project: Hadoop HDFS > Issue Type: Improvement > Affects Versions: 3.2.0 > Reporter: Xue Liu > Assignee: Xue Liu > Priority: Minor > Fix For: 3.2.0 > > Attachments: HDFS-14406.001.patch, HDFS-14406.002.patch, > HDFS-14406.003.patch, HDFS-14406.004.patch, HDFS-14406.005.patch > > > For a shared cluster we would want to separate users' resources, as well as > having our metrics reflecting on the usage, latency, etc, for each user. > This JIRA aims to add per user RPC processing time metrics and expose it via > JMX. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org