Can you explain bloommapfile.
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Whats the default port that jobtrackers listens ?
What is a Heartbeat in Hadoop?
Which operating system(s) are supported for production hadoop deployment?
What happen if one of the datanodes has much slower cpu?
Name the files which are used by the startup and shutdown commands?
How does speculative execution work in Hadoop?
Do we require two servers for the namenode and the datanodes?
Can you define udf?
What are the functionalities of jobtracer?
What happen when namenode enters in safemode in hadoop?
Ideally what should be the block size in hadoop?
What are the actions followed by hadoop?
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