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From "Weiwei Yang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-12354) Improve the throttle algorithm in Datanode BlockDeletingService
Date Fri, 25 Aug 2017 08:48:00 GMT
Weiwei Yang created HDFS-12354:
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             Summary: Improve the throttle algorithm in Datanode BlockDeletingService 
                 Key: HDFS-12354
                 URL: https://issues.apache.org/jira/browse/HDFS-12354
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: datanode, ozone
            Reporter: Weiwei Yang
            Assignee: Weiwei Yang


{{BlockDeletingService}} is a per-datanode container block deleting service takes in charge
of the "real" deletion of ozone blocks. It spawns a worker thread per container and delete
blocks/chunks from disk as background threads. The number of threads currently is throttled
by {{ozone.block.deleting.container.limit.per.interval}}, but there is a potential problem.
Containers are sorted so it always fetch same of containers, we need to fix this by creating
an API in {{ContainerManagerImpl}} to get a shuffled list of containers.



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