Hi, guys, Since i am quite new in using the Hadoop, currently i face one problem about the NameNode HA. Below is the case
1. We are using Hadoop 0.21 2. We manage about 1 NameNode, 1 Backup node and 100 datanodes Current issue: if the namenode crashed, it switched to the backup node. However we had to restart all 100 datanode. This cost us about 5-10 mins to restart all DataNodes. Any suggestion to resolve this, perhaps we can avoid restarting the datanoes, how to? Thanks in advanced. regards macf
