Workspace Management Commands

Node Requirements for SingleStore Helios Commands

SingleStore Helios commands must be run on the appropriate type(s) of node in a SingleStore Helios workspace.

When sync_permissions and enable_query_forwarding are set to ON, all Data Definition Language (DDL) commands can be forwarded from child aggregator to master. This list of requirements reflects this behavior.

X = recommended to run on this type of node
P = possible (but not recommended) to run on this type of node
blank = cannot run on this type of node

SingleStore Helios Command	Master Aggregator	Child Aggregator	Leaf
ANALYZE	X	X
ALTER DATABASE	X	X
ALTER RESOURCE POOL	X	X
ALTER TABLE	X	X	P
ALTER VIEW	X	X	P
ALTER USER	X	X
ALTER PIPELINE	X	X
BACKUP DATABASE	X	X
BEGIN	X	X	P
COMMIT	X	X	P
CREATE AGGREGATE	X	X
CREATE DATABASE	X	X	P
CREATE FUNCTION	X	X
CREATE GROUP	X	X
CREATE INDEX	X	X	P
CREATE PIPELINE	X	X
CREATE PROCEDURE	X	X
CREATE RESOURCE POOL	X	X
CREATE ROLE	X	X
CREATE TABLE	X	X	P
CREATE USER	X	X
CREATE VIEW	X	X
DELETE	X	X	P
DESCRIBE	X	X	X
DROP AGGREGATE	X	X
DROP DATABASE	X	X	P
DROP FUNCTION	X	X
DROP GROUP	X	X
DROP INDEX	X	X	P
DROP PIPELINE	X	X
DROP PROCEDURE	X	X
DROP RESOURCE POOL	X	X
DROP ROLE	X	X
DROP TABLE	X	X	P
DROP USER	X	X	X
DROP VIEW	X	X	P
DROP … FROM PLANCACHE	X	X	P
EXPLAIN	X	X	X
FLUSH TABLES	X		P
GRANT	X	X	X
GRANT GROUP	X	X	X
GRANT ROLE	X	X	X
INSERT	X	X	P
KILL CONNECTION	X	X	P
KILLALL QUERIES	X	X	P
LOAD DATA	X	X	P
OPTIMIZE TABLE	X	X	P
PROFILE PIPELINE	X	X
REPAIR DATABASE	X	X	X
REPLACE	X	X	P
RESTORE DATABASE	X	X
ROLLBACK	X	X	P
REVOKE	X	X
REVOKE GROUP	X	X
REVOKE ROLE	X	X
SELECT	X	X	P
SHOW COLUMNS	X	X
SHOW CREATE TABLE	X	X	P
SHOW DATABASES	X	X	P
SHOW GRANTS	X	X	X
SHOW INDEX	X	X	P
SHOW INDEXES	X	X	P
SHOW KEYS	X	X
SHOW PLANCACHE	X	X	X
SHOW PROCESSLIST	X	X	X
SHOW REPLICATION STATUS	X	X	X
SHOW SCHEMAS	X	X	P
SHOW GLOBAL STATUS	X	X	X
SHOW GLOBAL VARIABLES	X	X	X
SHOW RESOURCE POOLS	X	X	P
SHOW SESSION STATUS	X	X	X
SHOW SESSION VARIABLES	X	X	X
SHOW STATUS EXTENDED	X	X	X
SHOW TABLE STATUS	X	X	X
SHOW TABLES	X	X	X
SHOW VARIABLES	X	X	X
SHOW WARNINGS	X	X	X
SHOW ERRORS	X	X	X
START PIPELINE	X	X
STOP PIPELINE	X	X
TRUNCATE	X	X
UNLOCK TABLES	X
UPDATE	X	X	P
USE	X	X	P

Leaf States

Each leaf is in one of the following states:

State	Description
`Unknown`	In this state, a leaf is not part of the workspace.
`Online`	This is the default, healthy state of a leaf. In the `online` state, the leaf is an active member of the distributed system and is either currently serving or ready to serve data to the aggregators.
`Offline`	The master aggregator periodically sends a heartbeat (ping) to all the nodes in a workspace to determine if they are responsive and online. A leaf enters the `offline` state if the master aggregator cannot reach it. The heartbeat frequency is based on typical network latencies and node responsiveness. It is set to a default of 150ms which has been empirically determined. If the workspace is in redundancy 2 any partitions on the `offline` node will be failed over to the leaves pair. The master aggregator continues to ping `offline` nodes to detect when they should be moved into the `attaching` state.
`Recovering`	Not online, and not available for read or write queries. A leaf in `recovering` state has been restarted and is replaying data back into memory.
`Detached`	In this state, the leaf is detached from the workspace.
`Attaching`	A leaf transitions from `offline` to `attaching` when it is once again reachable by heartbeats.

The following diagram summarizes the leaf states and the transitions between them.

Workspace Management Commands

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Node Requirements for SingleStore Helios Commands

Leaf States

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