Haiyang Hu created HDFS-17243:
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             Summary: Add the parameter storage type for getBlocks method
                 Key: HDFS-17243
                 URL: https://issues.apache.org/jira/browse/HDFS-17243
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: balamcer
            Reporter: Haiyang Hu
            Assignee: Haiyang Hu


When Balancer is running, it is found that there are many logs, such as 

{code:java}
INFO  balancer.Dispatcher (Dispatcher.java:markMovedIfGoodBlock(306)) - No 
striped internal block on source xxx:50010:SSD, block blk_-xxx_xxx 
size=982142783. Skipping.
{code}
these logs show that Balancer cannot to balancer SSD type sourceļ¼Œ and it causes 
that Balancer will frequently get blocks from NN through getBlocks RPC.

The main reason is the storage type in the current Source is SSD, but now 
getBlocks obtains all list of blocks belonging to datanode, so need add the 
parameter storage type for getBlocks method







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