tunesys - 1 command for everything tunenodech - 1 command per node
tunenodech will only tune chunklets. It will only tune chunklets behind the node (ie, no tuning across nodes). It is the slowest way of doing things, but will also have the least amount of impact on the system.
tunesys will: * balance data across nodes * use tunenodech if capacity utilitization on some PDs are above a threshold (as tuneld prefers to have some "head room" capacity wise to run optimal) * use tuneld to ensure that all data stored in CPG is according to CPG config and balanced according to hardware balance.
If I'm only adding disks and only want/need to redistribute chunklets behind each node pair and use dedupe/compression I will use tunenodech. For everything else, I use tunesys.
_________________ The views and opinions expressed are my own and do not necessarily reflect those of my current or previous employers.
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