Help Center/ Data Replication Service/ FAQs/ Real-Time Synchronization/ Configuring Remote Connection to a GaussDB Database/ Configuration Method for a Synchronization Task from GaussDB Centralized
Updated on 2025-07-24 GMT+08:00
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Configuration Method for a Synchronization Task from GaussDB Centralized

You can modify the configuration file or use gs_guc to configure a task from GaussDB Centralized.

Modifying the Configuration File

  1. Log in to all nodes of a GaussDB Centralized instance. To synchronize data in a DR scenario, you also need to log in to all nodes of a DR instance and perform the following steps.
  2. Query the location of the configuration file. 

    find / -name "pg_hba.conf"
Or
find / -name "gs_hba.conf"

  3. Open the pg_hba.conf or gs_hba.conf file and add the following configurations: 

    host all <user> 0.0.0.0/0 sha256
    host replication <user> 0.0.0.0/0 sha256

  4. Run the following statement as a system administrator on the source database or restart the DB instance to apply the change: 

    select pg_reload_conf();

Using gs_guc

  1. For a cloud database, run the following command to access the sandbox. For a self-built database, run the source gauss_env_file command to configure the environment variable file.

    Log in to any database node, switch to user Ruby, and run the su - Ruby command.

    1. Versions earlier than 2.0 (V500R002C00) 
      /usr/sbin/chroot /var/chroot /bin/bash
source /etc/profile && source ~/.bashrc
    2. 2.0 (V500R002C00) and later versions 
      chroot /var/chroot
source /etc/profile; source /home/Ruby/.bashrc ;source /home/Ruby/gauss_env_file

    For the configuration of a Huawei Cloud GaussDB instance, you need to contact the database oncall personnel. To synchronize data in a DR scenario, you also need to log in to a DR instance for the configuration.

  2. 1) Common connections

    Connect all users and IP addresses to DNs via common connections.

    gs_guc reload -N all -I all -h "host all all 0.0.0.0/0 sha256"

    Connect a specified user and an IP address to DNs via common connections.

    gs_guc reload -N all -I all -h "host all <user> <ip>/32 sha256"

    2) Logical replication connections

    Connect all users and IP addresses to DNs via replication connections.

    gs_guc reload -N all -I all -h "host replication all 0.0.0.0/0 sha256"

    Connect a specified user and an IP address to DNs via replication connections.

    gs_guc reload -N all -I all -h "host replication <user> <ip>/32 sha256"