[ https://issues.apache.org/jira/browse/FLINK-15325?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zhu Zhu closed FLINK-15325. --------------------------- Fix Version/s: 1.17.0 Resolution: Done Done via c0bfb0b04bb38411c390813fea1ff93f6638f409 76ebeb93257369c136a9eeabd5bacb71a9699968 > Input location preference which affects task distribution may make certain > job performance worse > ------------------------------------------------------------------------------------------------- > > Key: FLINK-15325 > URL: https://issues.apache.org/jira/browse/FLINK-15325 > Project: Flink > Issue Type: Improvement > Components: Runtime / Coordination > Affects Versions: 1.16.0, 1.14.6, 1.15.3 > Reporter: Zhu Zhu > Assignee: Zhu Zhu > Priority: Major > Labels: pull-request-available > Fix For: 1.17.0 > > Attachments: D58ADB03-7187-46B1-B077-91E5005FD463.png > > > When running TPC-DS jobs in a session cluster, we observed that sometimes > tasks are not evenly distributed in TMs. The root cause turned out to be that > the downstream tasks tend to be TM or host local with its input tasks. This > helps to reduce network shuffle. > However, in certain cases, like the topology presented in the attached image, > jamming the input task's TM and machine with downstream tasks would affect > the performance. In this case, respecting input location preferences is > causing troubles more than bringing benefits. > So I'm wondering whether we should introduce a config so that users can > disable input location preferences? -- This message was sent by Atlassian Jira (v8.20.10#820010)