JiangHua Zhu created HDFS-16386:
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Summary: Reduce DataNode load when FsDatasetAsyncDiskService is
working
Key: HDFS-16386
URL: https://issues.apache.org/jira/browse/HDFS-16386
Project: Hadoop HDFS
Issue Type: Improvement
Components: datanode
Affects Versions: 2.9.2
Reporter: JiangHua Zhu
Our DataNode node has 36 disks. When FsDatasetAsyncDiskService is working, it
will cause a high load on the DataNode.
Here are some monitoring related to memory:
Since each disk deletes the block asynchronously, and each thread allows 4
threads to work,
This will cause some troubles to the DataNode, such as increased cpu and
increased memory.
We should appropriately reduce the number of jobs of the total thread so that
the DataNode can work better.
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