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https://issues.apache.org/jira/browse/HDFS-10800?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uma Maheswara Rao G updated HDFS-10800:
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Attachment: HDFS-10800-HDFS-10285-00.patch
Attaching the first patch for this JIRA.
StoragePolicySatisfier Daemon thread starts along with BlockManager activation
and take blockCollections one by one and identify the neededStorageMovement
blocks and builds the source and target DN mapping with the expected storage
types.
> [SPS]: Storage Policy Satisfier daemon thread in Namenode to find the blocks
> which were placed in wrong storages than what NN is expecting.
> -------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-10800
> URL: https://issues.apache.org/jira/browse/HDFS-10800
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Reporter: Uma Maheswara Rao G
> Assignee: Uma Maheswara Rao G
> Attachments: HDFS-10800-HDFS-10285-00.patch
>
>
> This JIRA is for implementing a daemon thread called StoragePolicySatisfier
> in nematode, which should scan the asked files blocks which were placed in
> wrong storages in DNs.
> The idea is:
> # When user called on some files/dirs for satisfyStorage policy, They
> should have tracked in NN and then StoragePolicyDaemon thread will pick one
> by one file and then check the blocks which might have placed in wrong
> storage in DN than what NN is expecting it to.
> # After checking all, it should also construct the data structures for
> the required information to move a block from one storage to another.
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