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https://issues.apache.org/jira/browse/HDFS-7076?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz Wo Nicholas Sze updated HDFS-7076:
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Component/s: (was: balancer)
Description: Currently block storage policies are hard coded. This JIRA is
to persist the policies in FSImage and Edit Log in order to support adding new
policies or modifying existing policies. (was: Currently block storage
policies are loaded from a XML file. This may lead to policy inconsistency if
the content of the XML gets modified or if the XML file is replaced by mistake.
Thus it is better to persist policies in editlog/fsimage.
Specifically we plan to do the following in this jira:
# Add new DistributedFileSystem API for getting all the existing storage
policies
# Add new DistributedFileSystem/HdfsAdmin API for adding a new storage policy.
The new storage policy is then persisted in editlog and later fsimage while
checkpointing.
)
(Revised description.)
> Persist Block Storage Policy in FSImage and Edit Log
> ----------------------------------------------------
>
> Key: HDFS-7076
> URL: https://issues.apache.org/jira/browse/HDFS-7076
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Attachments: HDFS-7076.000.patch, HDFS-7076.001.patch,
> HDFS-7076.002.patch, editsStored
>
>
> Currently block storage policies are hard coded. This JIRA is to persist the
> policies in FSImage and Edit Log in order to support adding new policies or
> modifying existing policies.
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