[ https://issues.apache.org/jira/browse/HDFS-13616?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated HDFS-13616: ---------------------------------- Labels: pull-request-available (was: ) > Batch listing of multiple directories > ------------------------------------- > > Key: HDFS-13616 > URL: https://issues.apache.org/jira/browse/HDFS-13616 > Project: Hadoop HDFS > Issue Type: New Feature > Affects Versions: 3.2.0 > Reporter: Andrew Wang > Assignee: Chao Sun > Priority: Major > Labels: pull-request-available > Fix For: 3.3.0 > > Attachments: BenchmarkListFiles.java, HDFS-13616.001.patch, > HDFS-13616.002.patch > > > One of the dominant workloads for external metadata services is listing of > partition directories. This canĀ end up being bottlenecked on RTT time when > partition directories contain a small number of files. This is fairly common, > since fine-grained partitioning is used for partition pruning by the query > engines. > A batched listing API that takes multiple paths amortizes the RTT cost. > Initial benchmarks show a 10-20x improvement in metadata loading performance. -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org