[ https://issues.apache.org/jira/browse/FLINK-26803?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated FLINK-26803: ----------------------------------- Labels: pull-request-available (was: ) > Merge small ChannelState file for Unaligned Checkpoint > ------------------------------------------------------ > > Key: FLINK-26803 > URL: https://issues.apache.org/jira/browse/FLINK-26803 > Project: Flink > Issue Type: Improvement > Components: Runtime / Checkpointing, Runtime / Network > Reporter: fanrui > Assignee: fanrui > Priority: Major > Labels: pull-request-available > Attachments: image-2022-05-05-12-36-09-969.png > > > When making an unaligned checkpoint, the number of ChannelState files is > TaskNumber * subtaskNumber. For high parallelism job, it writes too many > small files. It causes high load for hdfs NN. > > In our production, a job writes more than 50K small files for each Unaligned > Checkpoint. Could we merge these files before write FileSystem? We can > configure the maximum number of files each TM can write in a single Unaligned > Checkpoint. -- This message was sent by Atlassian Jira (v8.20.10#820010)