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10-19-2018
09:33 AM
Hadoop Stores data in local
disk Slow speed Suitable for batch
processing External schedulers
required High latency No in-built
interactive mode. less expensive hardware very difficult to work. Spark Stores data in-memory Faster speed Suitable for batch and
real-time processing Schedules tasks itself Low latency Has interactive mode Lot of RAM to run in-memory, increasing it in
the cluster, gradually increases its cost. It is easy to program
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10-16-2018
09:24 AM
Just before the command use the ! mark, we run unix
shell commands from the hive. For example- ! pwd at hive prompt will list the current directory.
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