[ https://issues.apache.org/jira/browse/CASSANDRA-18977?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sam Tunnicliffe updated CASSANDRA-18977: ---------------------------------------- Status: Review In Progress (was: Needs Committer) > Improve CMS handoff and configuration > ------------------------------------- > > Key: CASSANDRA-18977 > URL: https://issues.apache.org/jira/browse/CASSANDRA-18977 > Project: Cassandra > Issue Type: Improvement > Components: Cluster/Membership > Reporter: Sam Tunnicliffe > Assignee: Alex Petrov > Priority: Normal > Attachments: ci_summary.html > > > The intial mechanism for configuring membership of the CMS is rather > simplistic. It requires the operator to select which nodes are members and to > execute nodetool commands to perform every individual change to the > membership. Handoff when a member is decommissioned or replaced also uses a > naive strategy for selecting a replacement member. > This ticket enables the CMS membership to be configured more declaratively, > by specifying the desired number of CMS members per-DC, much like replication > using {{{}NetworkTopologyStrategy{}}}. > Cassandra itself is responsible for selecting exactly which nodes should be > CMS members based on this configuration and will attempt to maintain rack > diversity if possible, with handoff of CMS membership handled in the same way. > When making changes to membership Cassandra will manage the entire transition > from the starting state to end state using an in-progress sequence to compose > the specific additions and removal operations. > Implementation can be found in: > [https://github.com/beobal/cassandra/commit/bcbb3f441d9df10207be38066c9752a08d62545b] > CI summary results attached. For right now, we've only been foccussing on > unit tests, in-jvm & python dtests, so the failures in other suites are to be > expected. Unfortunately, the archive containing the detailed results is too > large to attach as a single file, so will look into the best way to work > around that. > The intention is to fix all suites before merging the feature branch. > > ||Suite||Total||Passed||Skipped||Failed||Errors|| > |jvm dtest|1508|1465|24|8|11| > |python dtest|1083|790|262|28|3| > |unit|12082|12006|61|6|9| -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org