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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

Erick Ramirez
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Vasilis_Dimitrakopoulos
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  • what about using Cassandra documentation? https://cassandra.apache.org/doc/latest/cassandra/tools/nodetool/nodetool.html – Alex Ott Aug 25 '22 at 09:16
  • Hey Alex, I have already check the documentation and of course i searched around the web but i did not find the answers i want.... for example i can not understand the difference between cleanup and compact and when to use them etc. ( I dont want just to try different commands and say hmm this one works so this is right) – Vasilis_Dimitrakopoulos Aug 25 '22 at 09:26
  • Welcome to Stack Overflow! A friendly reminder that Stack Overflow is for getting help with coding, algorithm, or programming language problems. For future reference, you should post DB admin/ops questions on https://dba.stackexchange.com/questions/ask?tags=cassandra. If you post it there, I'd be happy to help. Cheers! – Erick Ramirez Aug 25 '22 at 09:52
  • Hey Erick! Thanks a lot i did not knew about that... i think that https://dba.stackexchange.com/ just became my new daily search. – Vasilis_Dimitrakopoulos Aug 25 '22 at 10:01

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