6 Commits (ed8e1374679b98b3a066b9d2f9af7d535cbd62c7)

Author	SHA1	Message	Date
Hanefi Onaldi	29e4516642	Introduce citus_check_cluster_node_health UDF ... This UDF coordinates connectivity checks accross the whole cluster. This UDF gets the list of active readable nodes in the cluster, and coordinates all connectivity checks in sequential order. The algorithm is: for sourceNode in activeReadableWorkerList: c = connectToNode(sourceNode) for targetNode in activeReadableWorkerList: result = c.execute( "SELECT citus_check_connection_to_node(targetNode.name, targetNode.port") emit sourceNode.name, sourceNode.port, targetNode.name, targetNode.port, result - result -> true -> connection attempt from source to target succeeded - result -> false -> connection attempt from source to target failed - result -> NULL -> connection attempt from the current node to source node failed I suggest you use the following query to get an overview on the connectivity: SELECT bool_and(COALESCE(result, false)) FROM citus_check_cluster_node_health(); Whenever this query returns false, there is a connectivity issue, check in detail.	2021-12-15 01:41:51 +03:00
Nils Dijk	a748729998	rework ci	2020-12-18 18:04:45 +01:00
Sait Talha Nisanci	1b5ed45a58	add multi follower repartition tests	2020-07-13 19:50:50 +03:00
Jelte Fennema	7abedc38b0	Support subqueries in HAVING (#3098) ... Areas for further optimization: - Don't save subquery results to a local file on the coordinator when the subquery is not in the having clause - Push the the HAVING with subquery to the workers if there's a group by on the distribution column - Don't push down the results to the workers when we don't push down the HAVING clause, only the coordinator needs it Fixes #520 Fixes #756 Closes #2047	2019-10-16 16:40:14 +02:00
Marco Slot	9e7b1fb858	Return readable nodes in master_get_active_worker_nodes	2017-08-16 11:28:47 +02:00
Marco Slot	59e626d158	Add regression tests for follower clusters	2017-08-12 12:05:56 +02:00