CDC - MariaDB Setup Documentation

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Prerequisites

To set up CDC between your MariaDB database and Peaka Big Table, you need:

• A MariaDB server of any version (most recently tested on version 11.4.3)
• Access to the MariaDB configuration file.

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Setup Instructions

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Setting up permissions

Peaka CDC requires a MariaDB user account. This user must have appropriate permissions on all databases where you want to set up cache through CDC.

1. Create the MariaDB user:

CREATE USER 'user'@'localhost' IDENTIFIED BY 'password';

2. Grant the required permissions to the user:

GRANT SELECT, RELOAD, SHOW DATABASES, REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'user' IDENTIFIED BY 'password';

3. Finalize the user’s permissions:

FLUSH PRIVILEGES;

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Enabling the binlog

1. Check whether the log-bin option is already on:

SHOW VARIABLES LIKE '%log_bin%';

2. If the binlog is OFF, add the properties in the following table to the configuration file for the MariaDB server:

server-id         = 223344 # Querying variable is called server_id, e.g. SELECT variable_value FROM information_schema.global_variables WHERE variable_name='server_id';
log_bin                     = mariadb-bin
binlog_format               = ROW
binlog_row_image            = FULL
binlog_expire_logs_seconds  = 864000

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Validating binlog row value options

Verify the setting of the binlog_row_value_options variable in the database. To enable the connector to consume  UPDATE events, this variable must be set to a value other than PARTIAL_JSON.

1. Check current variable value

SHOW GLOBAL VARIABLES WHERE variable_name = 'binlog_row_value_options';

Result

2. If the value of the variable is set to PARTIAL_JSON, run the following command to unset it:

SET @@global.binlog_row_value_options="" ;