I have an application that perform only inserts/deletes in cassandra. All write operations (inserts/deletes) application perform using consistency level QUORUM, read operation currently is executed using QUORUM as well, but i`m wondering if in this case (when there is no updates to data) consistency level ONE would give same results as QUORUM.
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1 Answers
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Not necessarily. It could be that your read request goes to the one node which has not (yet) received/applied the updates. The QUORUM consistency level does allow for some nodes to not have the updated data just yet; by using a consistency level of ONE for your read, you might read stale data. Perhaps your application can deal with this situation -- that's for you to decide. But you should know that a consistency level of ONE for reads may not return the data you expect in your situation.
Hope this helps!
