I would like my 40 data nodes to aggressively report to namenode if they are alive or not therefore I think I need to change these params
dfs.block.access.token.lifetime : Default is 600 seconds. Can I decrease this to 60? dfs.block.access.key.update.interval: Default is 600 seconds. Can I decrease this to 60? Also, what are some other turnings people do for datanodes in a relatively large cluster? -- --- Get your facts first, then you can distort them as you please.--
