I am looking for any best practices / recommendation document that helps me plan how much free space should I have under /tmp for a HDP Upgrade.
My client's cluster has 2 different disk paths mentioned for dfs.namenode.dir, consequently there will be 2 fsimage files for Active Namenode.Each fsimage is roughly 40 GB.
The same is the case for standby namenode as well.Logically, a free space of 40x4 = 160 GB + some buffer should be fine.
However, I am looking for a proper/better way of going about this planning.
Why not create a symlink to a bigger partition during the upgrade and revert once you are done !
$ sudo mkdir /OneTB/tmp/
$ ln -s /oneTB/tmp/ /tmp/
The you are safe