Under replication blocks to be replicated on dead datanode

[vir2610]

Hi,

I was trying to figure out the default time interval for data-node to be complete the under replication blocks after failure. I have 2 blocks successfully placed on 2 different data-nodes but 3rd data-node was dead and now when it comes online, It is taking 5 minutes to start that missing block replication to be placed. I want to minimize this time interval. Is there any configuration property that can do this ?