I dont think we can set replication on block level.
We can change replication on a file. This will change the replication on all blocks belonging to a file

hadoop fs -setrep [-R] <path>
http://hadoop.apache.org/common/docs/current/hdfs_shell.html#setrep


-Sagar
smarthr...@yahoo.co.in wrote:
Is it possible to set the replication factor for a data block dynamically ?

Regards,
Hrishikesh




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