Start an OBServer

You can start an OBServer by running a command.

Start an observer process by running a command

Log on to the host of the OBServer and access the /home/admin/oceanbase/bin directory from the command-line interface (CLI). Run the following command to start the observer process:

cd /home/admin/oceanbase/

./bin/observer [startup parameters]

You can also run ./bin/observer --help to view the details of the observer startup parameters.

The following is an example command for starting an observer process:

cd /home/admin/oceanbase/bin

./observer -p 2881 -P 2882 -z 'zone_1' -d '/data/1/prod_data/' -r 'xx.xx.xx.1:2882:2881;xx.xx.xx.2:2882:2881;xx.xx.xx.3:2882:2881' -l WARN -d '/data/1/prod_data' -o 'memory_limit=100GB,datafile_disk_percentage=85'

In the command:

• 2881 is the access port of the MySQL client.

• 2882 is the remote access port.

• zone_1 is the zone name.

• /data/1/prod_data is the data disk directory.

• datafile_disk_percentage=85 indicates that the utilization of the data disk is 85%.

• xx.xx.xx.1, xx.xx.xx.2, and xx.xx.xx.3 are RootServers.

• memory_limit=100GB indicates that the maximum memory available for starting the process is 100 GB.

• WARN indicates that the logging level is set to WARNING.

• When the -o parameter is used, note that:

  • The parameter is case-insensitive. However, we recommend that you set it in accordance with the variable name in observer.config.bin.

  • The parameter cannot contain the following special characters:

    • Space

    • \r

    • \n

    • \t

  • An equal sign (=) must be used between the parameter name and the parameter value.

  • Parameters must be separated with commas (,).