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MapReduce, mail # user - task trackers


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task trackers
Kartashov, Andy 2012-10-22, 14:55
Gentlemen,

Can you please explain which property is responsible to tell JobTracker where TaskTruckers are running?

I get this far so far:

NN knows where SNN runs by specifying FQDN in the conf/masters of the NN
NN knows where DN runs by specifying FQDNs of the DNs in the conf/slaves of the NN
SNN knows the host:port of the NN using hdfs-core.xml
DNs know wherethehost:port of the NN using hdfs-core.xml

TTs know where the JT is using mapred-site.xml

But how does JT knows where the TTs are?

Please help.

Thanks,
Andy
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