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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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Kai Zheng updated HDFS-10800:
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Description:
This JIRA is for implementing a daemon thread called StoragePolicySatisfier in
namatode, which scans the asked files blocks which are placed in different
storages in DNs than the related policies specifie.
The idea is:
# When user called on some files/dirs to satisfy storage policy, they
should have been tracked in NN and then StoragePolicySatisfier thread will pick
one by one file, then check the blocks which might have been placed in
different storage in DN than what the storage policy is expecting it to.
# After checking all, it should also construct the data structures with
the required information to move a block from one storage to another.
was:
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.
> [SPS]: Daemon thread in Namenode to find blocks placed in other storage than
> what the policy specifies
> ------------------------------------------------------------------------------------------------------
>
> Key: HDFS-10800
> URL: https://issues.apache.org/jira/browse/HDFS-10800
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Affects Versions: HDFS-10285
> Reporter: Uma Maheswara Rao G
> Assignee: Uma Maheswara Rao G
> Attachments: HDFS-10800-HDFS-10285-00.patch,
> HDFS-10800-HDFS-10285-01.patch, HDFS-10800-HDFS-10285-02.patch,
> HDFS-10800-HDFS-10285-03.patch, HDFS-10800-HDFS-10285-04.patch
>
>
> This JIRA is for implementing a daemon thread called StoragePolicySatisfier
> in namatode, which scans the asked files blocks which are placed in different
> storages in DNs than the related policies specifie.
> The idea is:
> # When user called on some files/dirs to satisfy storage policy, they
> should have been tracked in NN and then StoragePolicySatisfier thread will
> pick one by one file, then check the blocks which might have been placed in
> different storage in DN than what the storage policy is expecting it to.
> # After checking all, it should also construct the data structures with
> the required information to move a block from one storage to another.
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