[
https://issues.apache.org/jira/browse/CASSANDRA-14557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17427346#comment-17427346
]
Stefan Miklosovic commented on CASSANDRA-14557:
-----------------------------------------------
[~jolynch] I think the only reason for having EverywhereStrategy as of now
(besides compatibility with and migration from DSE) is to automagically place
the data _everywhere_. If I have 10 nodes in 1 dc, I would have to know I have
10 nodes. I know it is a little bit silly but with EverywhereStrategy, one does
not even have to know how many nodes she has. With your example, I have to know
I have at least 3 nodes, is not that true?
I dont object this patch and I find it useful. All I would like to see is
updated Javadoc reflecting the logic we are introducing - that we are putting
default rf into options if they are not found there.
> Add 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: 14557-4.0.txt, 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.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
