When you run TPstats or Tablestats subcommands in nodetool you are actually 
accessing data inside Cassandra via JMX.

You can start there at first.

On Jun 28, 2018, 10:55 AM -0500, Thouraya TH <thouray...@gmail.com>, wrote:
> Hi,
> Please, how can check the health of my cluster / data center using cassandra ?
> In fact i'd like to generate a hitory of the state of each node. an history 
> about the failure of my cluster ( 20% of failure in a day, 40% of failure in 
> a day etc...)
> Thank you so much.
> Kind regards.

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