Colin Patrick McCabe created HDFS-8989:
------------------------------------------
Summary: Allow rate-limiting the DirectoryScanner via time-slicing
Key: HDFS-8989
URL: https://issues.apache.org/jira/browse/HDFS-8989
Project: Hadoop HDFS
Issue Type: Improvement
Components: datanode
Affects Versions: 2.0.6-alpha
Reporter: Colin Patrick McCabe
Assignee: Daniel Templeton
When the inodes and directory entries for HDFS block and meta files are not in
the cache, the DirectoryScanner can create enormous disk load via generating
many seeks. This can effectively make the disks unusable for other purposes.
We should allow rate-limiting the DirectoryScanner via time-slicing, so that it
only runs every 100 ms out of 1 s (or whatever other percentage we configure.)
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
