Can someone explain in simple terms Cassandra nodetool commands like compact and cleanup?

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Hello Everyone

I am new in databases and i am trying to understand some Cassandra commands. I would like to know about the following commands :

  • nodetool compact
  • nodetool cleanup
  • nodetool repair
  • nodetool garbagecollect

I would appreciate some simple and clear answers like -> nodetool help : it shows all the commands and their usage.

The problem i am trying to solve is that after i delete (a lot of data) the storage is still full. I change the gc_grace_seconds to 1 day and still nothing. So if i need to clear the space manualy right now which commands should i run and in what order?

Thanks for your time

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