Help Center > > Developer Guide> Data Export> Using gs_dump and gs_dumpall to Export Data> Exporting All Databases> Exporting All Databases

Exporting All Databases

Updated at: Jul 14, 2021 GMT+08:00

You can use gs_dumpall to export full information of all databases in a cluster from GaussDB(DWS), including information about each database and global objects in the cluster. You can specify the information to be exported as follows:

  • Export full information of all databases, including information about each database and global objects (such as roles and tablespaces) in the cluster.

    You can use the exported information to create a same cluster containing the same databases, global objects, and data as the current one.

  • Export data of all databases, excluding all object definitions and global objects.
  • Export all object definitions of all databases, including the definitions of tablespaces, databases, functions, schemas, tables, indexes, and stored procedures.

    You can use the exported object definitions to quickly create a same cluster as the current one, containing the same databases and tablespaces but without data.

Procedure

  1. Connect to the default database gaussdb as a database administrator through the database client tool provided by GaussDB(DWS).

    For example, use the gsql client to connect to the database by running the following command:

    1
    gsql -d gaussdb -h 192.168.2.30 -U dbadmin -p 8000 -r
    

    Enter the password as prompted.

  2. Run gs_dumpall to export full information of all databases.

    gs_dumpall -W Bigdata@123 -U omm -f /home/dbadmin/backup/MPPDB_backup.sql -p 8000 
    Table 1 Common parameters

    Parameter

    Description

    Example Value

    -U

    User name for database connection. The user must be a cluster administrator.

    -U omm

    -W

    User password for database connection.

    • This parameter is not required for database administrators if the trust policy is used for authentication.
    • If you connect to the database without specifying this parameter and you are not a database administrator, you will be prompted to enter the password.

    -W Bigdata@123

    -f

    Folder to store exported files. If this parameter is not specified, the exported files are stored in the standard output.

    -f /home/dbadmin/backup/MPPDB_backup.sql

    -p

    TCP port or the local Unix-domain socket file extension on which the server is listening for connections.

    -p 8000

    For details about other parameters, see gs_dumpall.

Examples

Example 1: Run gs_dumpall as a cluster administrator omm to export full information of all databases in a cluster. After the command is executed, a large amount of output information will be displayed. total time will be displayed at the end of the information, indicating that the backup is successful. In this example, only relative output information is included.

gs_dumpall -W Bigdata@123 -U omm -f /home/dbadmin/backup/MPPDB_backup.sql -p 8000 
gs_dumpall[port='8000'][2017-07-21 15:57:31]: dumpall operation successful
gs_dumpall[port='8000'][2017-07-21 15:57:31]: total time: 9627  ms

Example 2: Run gs_dumpall as a cluster administrator omm to export object definitions of all databases in a cluster. The exported files are in text format. After the command is executed, a large amount of output information will be displayed. total time will be displayed at the end of the information, indicating that the backup is successful. In this example, only relative output information is included.

gs_dumpall -W Bigdata@123 -U omm -f /home/dbadmin/backup/MPPDB_backup.sql -p 8000 -s 
gs_dumpall[port='8000'][2018-11-14 11:28:14]: dumpall operation successful
gs_dumpall[port='8000'][2018-11-14 11:28:14]: total time: 4147  ms

Example 3: Run gs_dumpall to export data of all databases in a cluster, encrypt the exported files, and store them in text format. After the command is executed, a large amount of output information will be displayed. total time will be displayed at the end of the information, indicating that the backup is successful. In this example, only relative output information is included.

gs_dumpall -f /home/dbadmin/backup/MPPDB_backup.sql -p 8000 -a --with-encryption AES128 --with-key 1234567812345678
gs_dumpall[port='8000'][2018-11-14 11:32:26]: dumpall operation successful
gs_dumpall[port='8000'][2018-11-14 11:23:26]: total time: 4147  ms

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