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Posted to hdfs-dev@hadoop.apache.org by Wei-Chiu Chuang <we...@apache.org> on 2021/06/08 09:11:39 UTC

Heads up! Merging HDFS-13671. Namenode deletes large dir slowly caused by FoldedTreeSet#removeAndGet

Hello,

Just want to make sure everyone interested in HDFS dev is aware
that HDFS-13671 (Namenode deletes large dir slowly caused by
FoldedTreeSet#removeAndGet) will soon to be merged.

The folded tree set data structure introduced in Hadoop 3 has big
performance regression when delete files. Since it touches the core of
HDFS, I thought it would be a good idea to send out the notice for a
broader audience.

PR: https://github.com/apache/hadoop/pull/3065