[jira] [Updated] (CASSANDRA-16747) Block/Warn creating keyspace with RF > Cassandra node count

["Paulo Motta (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-16747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Paulo Motta updated CASSANDRA-16747:
------------------------------------
     Labels: lhf  (was: )
    Summary: Block/Warn creating keyspace with RF > Cassandra node count  (was: Block creating keyspace with RF > Cassandra node count)

> Block/Warn creating keyspace with RF > Cassandra node count
> -----------------------------------------------------------
>
>                 Key: CASSANDRA-16747
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16747
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Cluster/Schema
>            Reporter: Tri Nguyen
>            Priority: Normal
>              Labels: lhf
>             Fix For: 3.11.x
>
>
>  
> Using Cassandra 3.11.10, 3 nodes cluster Cassandra allows to create a keyspace having `replication_factor` greater than the number of available nodes.
>  
> {code:java}
> -- successfully created Keyspace with RF = 3 > node count = 3
> CREATE KEYSPACE mykeyspace WITH replication = {'class': 'SimpleStrategy', 'replication_factor': 5 };
> {code}
> From [this discussion|https://community.datastax.com/questions/11623/create-keyspace-with-rf-physical-cassandra-node-co.html] on community.datastax.com. It appears that this would lead to serious operational problems.
> Would it be OK to improve the `CREATE KEYSPACE` to block (or display warning) when attempting to set `replication_factor` > node count?
>  



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