CODEWITHSUNDEEP
cassandracassandra-2.0
user2704472
user2704472

Reputation: 219

insert fails with Durable Writes on Node down

I have 2 node cluster with replication={'class' : 'NetworktopologyStrategy','DC':'1'} AND durable_writes=true;

, my insert fails when one of the node is down.

The Consistency level is one.

Upvotes: 0

Views: 169

Answers (1)

Jim Meyer
Jim Meyer

Reputation: 9475

For all inserts to be successful with one node down, you'd need to use a replication factor of 2. When you only use a replication factor of 1, the insert may hash to the down node, and so it cannot complete the write.

If you have a replication factor of 2 and do a write with consistency of ONE, then it can write to the node that is still up.

Or if you turn on hinted handoffs and write with a consistency level of ANY, then you could use a replication factor of 1 and the insert would still succeed, but the write would be delayed until the down node came back up.

Upvotes: 2

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