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Chris Lohfink commented on CASSANDRA-14572: ------------------------------------------- Please do! > Expose all table metrics in virtual table > ----------------------------------------- > > Key: CASSANDRA-14572 > URL: https://issues.apache.org/jira/browse/CASSANDRA-14572 > Project: Cassandra > Issue Type: New Feature > Components: Legacy/Observability, Observability/Metrics > Reporter: Chris Lohfink > Assignee: Chris Lohfink > Priority: Low > Labels: virtual-tables > > While we want a number of virtual tables to display data in a way thats great > and intuitive like in nodetool. There is also much for being able to expose > the metrics we have for tooling via CQL instead of JMX. This is more for the > tooling and adhoc advanced users who know exactly what they are looking for. > *Schema:* > Initial idea is to expose data via {{((keyspace, table), metric)}} with a > column for each metric value. Could also use a Map or UDT instead of the > column based that can be a bit more specific to each metric type. To that end > there can be a {{metric_type}} column and then a UDT for each metric type > filled in, or a single value with more of a Map<Text, Text> style. I am > purposing the column type though as with {{ALLOW FILTERING}} it does allow > more extensive query capabilities. > *Implementations:* > * Use reflection to grab all the metrics from TableMetrics (see: > CASSANDRA-7622 impl). This is easiest and least abrasive towards new metric > implementors... but its reflection and a kinda a bad idea. > * Add a hook in TableMetrics to register with this virtual table when > registering > * Pull from the CassandraMetrics registery (either reporter or iterate > through metrics query on read of virtual table) -- 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