On Mon, Apr 13, 2015 at 1:36 PM, Benyi Wang <bewang.t...@gmail.com> wrote:

>
>    - I need to run compaction one each node,
>
> In general, there is no requirement to manually run compaction. Minor
compaction occurs in the background, automatically.

>
>    - To repair a table (column family), I only need to run repair on any
>    of nodes.
>
> It depends on whether you are doing -pr or non -pr repair.

If you are doing -pr repair, you run repair on all nodes. If you do non -pr
repair, you have to figure out what set of nodes to run it on. That's why
-pr exists, to simplify this.

=Rob

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