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From "Weiwei Yang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-12354) Shuffle container list for datanode BlockDeletingService
Date Fri, 25 Aug 2017 08:49:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-12354?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Weiwei Yang updated HDFS-12354:
-------------------------------
    Summary: Shuffle container list for datanode BlockDeletingService  (was: Shuffle container
list for BlockDeletingService)

> Shuffle container list for 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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