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Describe the different consistency levels for read operation in Cassandra?

devquora
devquora

Posted On: Feb 22, 2018

 

  • All
    • It is extremely consistent. It is compulsory to a write needs to be written to memtable and commit log which is on copy nodes in the group
  • EACH_QUORUM
    • It is compulsory for a write needs to be written to memtable and commit log on quorum which exists on copy nodes in all data centers
  • LOCAL_QUORUM
    • It is compulsory for a write needs to be written to memtable and commit log on the quorum of copy nodes but only in the same center.
  • ONE
    • It is compulsory for a write needs to be written to memtable and commit log with one or more replica node.
  • TWO
    • It is compulsory for a write needs to be written to memtable and commit log with one or more replica node.
  • THREE
    • Same as the above but it should be with three replica nodes, sequentially

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