I'm planning to install the Ambari 2.1.1 HDP 2.4 on RedHat 7.2 Operating System. Does anyone have a complete checklist of OS settings need to be done before installation? I need something other than this link
Changing THP to never
Thanks for the quick response, I have already made all the changes which are in that link. Even I have made changes which I mentioned in the example. Now I need more OS level setting which improves cluster performance.
sure. change swappiness to 1 not 0 which is what you have. Also disable transparent_huge_page as well as transparent_hugepage defrag.
When you are using Hadoop, your files are in Hadoop file system. So you don't really need to track last access time for your files. Disable that for your mount points using "noatime". This will stop linux from keeping track of last access times which is not used anyway.
If you could, in your BIOS settings, change CPU and CPU frequency governance to performance mode. This is a tradeoff between power and performance. So make sure you know what you are doing. your current loads may not already be CPU bound so there may not be any point in doing this. Same things with power settings. you change those to performance for power/performance tradeoff. These are more meant to be sucking juice out of your hardware after you have done everything at OS level, so ideally you don't want to go this far.