Team, I have rack awareness configured and seems to work fine. My default rep count is 2. Now I lost one rack due to switch failure. Here is what I observe
HDFS continues to write in the existing available rack. It still keeps two copies of each block, but now these blocks are being stored in the same rack. My questions: Is this the default HDFS behavior ? What happens when the failed rack in back online ? Will HDFS automatically rewrite blocks to the other rack ? Or - Do I have to run the rebalance to make that happen ? Thanks in advance.
