Tim Armstrong created IMPALA-8121: ------------------------------------- Summary: Pick better default flags in containers Key: IMPALA-8121 URL: https://issues.apache.org/jira/browse/IMPALA-8121 Project: IMPALA Issue Type: Sub-task Components: Infrastructure Reporter: Tim Armstrong Assignee: Tim Armstrong
There are some new features of Impala that are done but disabled by default because they are not strictly better than the previous versions. E.g. the various metadata improvements. Containerised Impala is likely to be new deployments, so it is easier to make potentially disruptive changes to defaults now. h2. Metadata V2 Flags Catalogd: --catalog_topic_mode=minimal Impalad: --use_local_catalog=true I think we *may* also want to configure automatic invalidations of tables from the catalogd so that changes to the underlying storage cluster are eventually reflected in the compute cluster. There's a better solution in the pipeline that uses HMS notifications (https://issues.apache.org/jira/browse/IMPALA-7970), but in the meantime invalidation is time-based. Catalogd: --invalidate_tables_timeout_s=3600 Once IMPALA-7970 goes in, we probably also want automatic invalidation by default (TBD - how to handle older HMS that doesn't support those APIs). Catalogd: --hms_event_polling_interval_s=??? We probably want to enable HDFS preads for remote reads: -use_hdfs_pread -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-all-unsubscr...@impala.apache.org For additional commands, e-mail: issues-all-h...@impala.apache.org