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From rajesh damera <d.rajes...@gmail.com>
Subject Re: how namenode decided which datanode are ready for a client
Date Tue, 19 May 2015 08:56:38 GMT
Namenode usually checks for the jobs running on the datanodes, of which
tasktrackers keep a track of and decides if it still busy running a task.
On May 19, 2015 14:23, "rajesh damera" <d.rajesh15@gmail.com> wrote:

> Datanode availability is monitored and decided by Namenode. You usually
> get permissions, based on the type of user you are, to use a certain number
> of nodes to run your jobs. These limitations are set by administrators at
> user level
> Warm regards
> Rajesh Damera
> On May 19, 2015 14:08, "Himawan Mahardianto" <mahardianto@ugm.ac.id>
> wrote:
>> Hi guys, I know that every datanode where sending heartbeat to prove that
>> their alive but what method are used by namenode to decide which datanode
>> are available to client if all datanode where available?
>> Best Regards

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