Cassandra provides different consistency levels that can be ensured at query tim

Question

Cassandra provides different consistency levels that can be ensured at query time. ANY is a level of consistency for write queries, where the query to a key succeeds if it is written to any one of the nodes, including ones that may not be managing the key. QUORUM is a level of consistency where the write succeeds only after a majority of the nodes (i.e., more than half) managing the key have been written to. Answer the following questions in 3-5 sentences each.

1. What can you say about the availability of these two consistency levels?

2. If there are n nodes in Cassandra managing a key, how many failures can the two consistency levels handle?

Explanation / Answer

QUOROM is helpful to write multiple nodes in cluster and maintains higher consistency but there will be more failure rate too..

2 .First consistency level 'ANY' handle more failure cases since it has to check atleast one node with key, so most probably very less failures occur.

Second consistency 'QUOROM' handles very less failure since it is success only more than half nodes need to manage key, so it has more number of failures compare to 'ANY' consistency level.

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