[ https://issues.apache.org/jira/browse/CASSANDRA-19009?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17783833#comment-17783833 ]
Blake Eggleston commented on CASSANDRA-19009: --------------------------------------------- [C*|[https://github.com/bdeggleston/cassandra/tree/C19009-accord-fpconfig]] [Accord|[https://github.com/bdeggleston/cassandra-accord/tree/accord-fp-reconfigure-2]] [CI|[https://app.circleci.com/pipelines/github/bdeggleston/cassandra/345/workflows/227bccbd-255e-4a90-a8d8-d2765e746dd1]] > CEP-15: (C*/Accord) Schema based fast path reconfiguration > ----------------------------------------------------------- > > Key: CASSANDRA-19009 > URL: https://issues.apache.org/jira/browse/CASSANDRA-19009 > Project: Cassandra > Issue Type: Improvement > Components: Accord > Reporter: Blake Eggleston > Assignee: Blake Eggleston > Priority: Normal > Fix For: 5.0.x > > > This adds availability aware accord fast path reconfiguration, as well as > user configurable fast path settings, which are set at the keyspace level and > (optionally) at the table level for increased granularity. > The major parts are: > *Add availability information to cluster metadata* > Accord topology in C* is not stored in cluster metadata, but is meant to > calculated deterministically from cluster metadata state at a given epoch. > This adds the availability data, as well as the failure detector / gossip > listener and state change deduplication to CMS. > *Move C* accord keys/topology from keyspace prefixes to tableid prefixes* > To support per-table fast path settings, topologies and keys need to include > the table id. Since accord topologies could begin to consume a lot of memory > in clusters with a lot of nodes and tables, topology generation has been > updated to reuse previously allocated shards / shard parts where possible, > which will only increase heap sizes when things actually change. > *Make fast path settings configurable via schema* > There are 2.5 strategies: Simple, Parameterized, and InheritKeyspaceSettings. > Simple will use as many available nodes as possible for the fast path > electorate, this is the default for the keyspace fast path strategy. > Parameterized allows you to set a target size, and preferred datacenters for > the FP electorate. InheritKeyspace tells topology generation to just use the > keyspace fast path settings, and is the default for the table fast path > strategy. -- 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