
Introducing Hadoop | 63
• By default, HDFS is replicate by a factor
of 3, which means they are in a cluster of
at least 3 copies of each file ingested into
the cluster. This factor is fully configurable
and it can be increased or decreased inside
Hadoop configuration file or through com-
mand line using Hadoop command.
• Replicate files from an external source
into HDFS using put or copyFromLocal
commands. Difference in between put
and copyFromLocal is, using put several
remote machines local file can be copied
but through copyFromLocal, only specific
machine’s local file can be placed in HDFS.
• In an enterprise business application, a
commercial ...