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https://issues.apache.org/jira/browse/HDFS-2363?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uma Maheswara Rao G updated HDFS-2363:
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Description:
{code}
final List<DatanodeDescriptor> live = new ArrayList<DatanodeDescriptor>();
final List<DatanodeDescriptor> dead = new ArrayList<DatanodeDescriptor>();
blockManager.getDatanodeManager().fetchDatanodes(live, dead, false);
out.println("Live Datanodes: "+live.size());
out.println("Dead Datanodes: "+dead.size());
blockManager.metaSave(out);
{code}
Logically all the dataNode related logic can be moved to BlockManager.
So, here metaSave API is getting the DataNodes details from blockManager to
FsNameSystem and after printing the details again it is giving the control to
blockManager.
It will be good to move the DNs size printing code also to BlockManager.
> Move datanodes size printing to BlockManager from FSNameSystem's metasave API
> -----------------------------------------------------------------------------
>
> Key: HDFS-2363
> URL: https://issues.apache.org/jira/browse/HDFS-2363
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: name-node
> Affects Versions: 0.23.0, 0.24.0
> Reporter: Uma Maheswara Rao G
> Assignee: Uma Maheswara Rao G
> Priority: Minor
>
> {code}
> final List<DatanodeDescriptor> live = new
> ArrayList<DatanodeDescriptor>();
> final List<DatanodeDescriptor> dead = new
> ArrayList<DatanodeDescriptor>();
> blockManager.getDatanodeManager().fetchDatanodes(live, dead, false);
> out.println("Live Datanodes: "+live.size());
> out.println("Dead Datanodes: "+dead.size());
> blockManager.metaSave(out);
> {code}
> Logically all the dataNode related logic can be moved to BlockManager.
> So, here metaSave API is getting the DataNodes details from blockManager to
> FsNameSystem and after printing the details again it is giving the control to
> blockManager.
> It will be good to move the DNs size printing code also to BlockManager.
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