[jira] [Created] (CASSANDRA-19841) Memtable configs don't have defaults for each format supported

["David Capwell (Jira)" <ji...@apache.org>]

David Capwell created CASSANDRA-19841:
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             Summary: Memtable configs don't have defaults for each format supported
                 Key: CASSANDRA-19841
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-19841
             Project: Cassandra
          Issue Type: Improvement
          Components: Local/Config
            Reporter: David Capwell


We added support to change memtable and sstables via yaml but it seems we only added defaults for sstables and missed them for memtables.  We document recommended defaults in config/cassandra.yaml but that isn’t present in Config nor is it present in the resolution logic that translates the config to our maps, this means that anyone who defines their own yaml won’t have “skiplist”, “trie”, or “shardedskiplist” as default options to pick from and must know how to define them.

To make it easier for users we should provide defaults that could be overridden by users, just like we did for SSTables



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