how to restore under-replicated blocks to the replication factor by myself?

Question

I have two datanodes ,three files on them. because file is very small ,so one block one file . the replication factor is 2,now there is only 3 under-replicated blocks in the cluster. How can I restore the blocks to 6?

thank you for your help!

With only two datanode, I do not think you can have a replication factor of more than 2. — jfg956

David Gruzman David Gruzman · Accepted Answer · 2013-02-13T10:49:59

If there enough data nodes for the defined replicated factor - NameNode will take care to restore replication factor
If you want it to happen just now - I think copy files will do the job.

how to restore under-replicated blocks to the replication factor by myself?

2 Answers