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https://issues.apache.org/jira/browse/CASSANDRA-14557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17105521#comment-17105521
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Alex Petrov commented on CASSANDRA-14557:
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Wanted to commit this since it looked like this is a complete patch, so rebased
and triggered a CI.
I have two comments:
* I'm not sure if changing replication factor of system keyspaces is expected
by anyone who sees this feature. Maybe we should have a discussion about this
before the change.
* There's a dtest failure that looks related, please check it out before we
proceed with committing:
https://circleci.com/gh/ifesdjeen/cassandra/2122#tests/containers/13 more
failures here:
https://circleci.com/gh/ifesdjeen/cassandra/2123#tests/containers/32
Rebased branch: https://github.com/ifesdjeen/cassandra/tree/14557-trunk
All CI results: https://circleci.com/gh/ifesdjeen/cassandra/tree/14557-trunk
In general, I suggest putting ticket into "ready to commit" state so that
committers could pick notice it, or ping some committer directly.
> Consider adding default and required keyspace replication options
> -----------------------------------------------------------------
>
> Key: CASSANDRA-14557
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14557
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
> Reporter: Sumanth Pasupuleti
> Assignee: Sumanth Pasupuleti
> Priority: Low
> Labels: 4.0-feature-freeze-review-requested
> Fix For: 4.x
>
> Attachments: 14557-trunk.patch
>
>
> Ending up with a keyspace of RF=1 is unfortunately pretty easy in C* right
> now - the system_auth table for example is created with RF=1 (to take into
> account single node setups afaict from CASSANDRA-5112), and a user can
> further create a keyspace with RF=1 posing availability and streaming risks
> (e.g. rebuild).
> I propose we add two configuration options in cassandra.yaml:
> # {{default_keyspace_rf}} (default: 1) - If replication factors are not
> specified, use this number.
> # {{required_minimum_keyspace_rf}} (default: unset) - Prevent users from
> creating a keyspace with an RF less than what is configured
> These settings could further be re-used to:
> * Provide defaults for new keyspaces created with SimpleStrategy or
> NetworkTopologyStrategy (CASSANDRA-14303)
> * Make the automatic token [allocation
> algorithm|https://issues.apache.org/jira/browse/CASSANDRA-13701?focusedCommentId=16095662&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16095662]
> interface more intuitive allowing easy use of the new token allocation
> algorithm.
> At the end of the day, if someone really wants to allow RF=1, they simply
> don’t set the setting. For backwards compatibility the default remains 1 and
> C* would create with RF=1, and would default to current behavior of allowing
> any RF on keyspaces.
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