CONFIG Syntax

Introduction to Configuration

Nebula Graph gets configuration from meta by default. If you want to get configuration locally, please add the --local_config=true option in the configuration files metad.conf, storaged.conf, graphd.conf (directory is /home/user/nebula/build/install/etc) respectively.

Note:

  • Configuration precedence: meta > console > environment variable > configuration files.
  • If set --local_config to true, the configuration files take precedence.
  • Restart the services after changing the configuration files to take effect.
  • Configuration changes in console take effect in real time.

SHOW CONFIGS

SHOW CONFIGS [graph|meta|storage]

For example:

nebula> SHOW CONFIGS meta;
============================================================================================================================
| module | name                                        | type   | mode      | value                                        |
============================================================================================================================
| META   | v                                           | INT64  | IMMUTABLE | 4                                            |
----------------------------------------------------------------------------------------------------------------------------
| META   | help                                        | BOOL   | IMMUTABLE | False                                        |
----------------------------------------------------------------------------------------------------------------------------
| META   | port                                        | INT64  | IMMUTABLE | 45500                                        |
----------------------------------------------------------------------------------------------------------------------------

GET CONFIGS

GET CONFIGS [graph|meta|storage :] var

For example

nebula> GET CONFIGS storage:local_ip;
=======================================================
| module  | name     | type   | mode      | value     |
=======================================================
| STORAGE | local_ip | STRING | IMMUTABLE | 127.0.0.1 |
-------------------------------------------------------
nebula> GET CONFIGS heartbeat_interval_secs;
=================================================================
| module  | name                    | type  | mode      | value |
=================================================================
| GRAPH   | heartbeat_interval_secs | INT64 | MUTABLE | 10    |
-----------------------------------------------------------------
| STORAGE | heartbeat_interval_secs | INT64 | MUTABLE | 10    |
-----------------------------------------------------------------

UPDATE CONFIGS

UPDATE CONFIGS [graph|meta|storage :] var = value

The updated CONFIGS will be stored into the meta service permanently. If the configuration's mode is MUTABLE, the change will take effect immediately. The configurations of some RocksDB parameters take effect after the services are restarted. Expressions are supported in the UPDATE CONFIGS command.

For example:

nebula> UPDATE CONFIGS storage:heartbeat_interval_secs=1;
nebula> GET CONFIGS storage:heartbeat_interval_secs;
===============================================================
| module  | name                    | type  | mode    | value |
===============================================================
| STORAGE | heartbeat_interval_secs | INT64 | MUTABLE | 1     |
---------------------------------------------------------------