Exporting All Databases

You can use gs_dumpall to export full information of all databases in MogDB, including information about each database and global objects in MogDB. You can specify the information to export as follows:

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

You can use the exported information to create a host environment 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 host environment that is the same as the current one, containing the same databases and tablespaces but no data.

Procedure

Run gs_dumpall to export full information of all databases.

gs_dumpall -W Bigdata@123 -U omm -f /home/omm/backup/MPPDB_backup.sql -p 8000

Table 1 Common parameters

Parameter	Description	Example Value
-U	Username for database connection. The user must be an MogDB 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/omm/backup/MPPDB_backup.sql
-p	TCP port or local Unix-domain socket file extension on which the server is listening for connections.	-p 8000

For details about other parameters, see "Tool Reference > Server Tools > gs_dumpall" in the Reference Guide.

Examples

Example 1: Run gs_dumpall as the 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/omm/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 the 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/omm/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/omm/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

Exporting Global Objects

You can use gs_dumpall to export global objects, including database users, user groups, tablespaces, and attributes (for example, global access permissions), from MogDB.

Procedure

Run gs_dumpall to export global tablespaces.

gs_dumpall -W Bigdata@123 -U omm -f /home/omm/backup/MPPDB_tablespace.sql -p 8000 -t

Table 1 Common parameters

Parameter	Description	Example Value
-U	Username for database connection. The user must be an MogDB 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/omm/backup/MPPDB_tablespace.sql
-p	TCP port or local Unix-domain socket file extension on which the server is listening for connections.	-p 8000
-t	Dumps only tablespaces. You can also use -tablespaces-only alternatively.	-

For details about other parameters, see "Tool Reference > Server Tools > gs_dumpall" in the Reference Guide.

Examples

Example 1: Run gs_dumpall as the cluster administrator omm to export global tablespaces and users of all databases. The exported files are in text format.

gs_dumpall -W Bigdata@123 -U omm -f /home/omm/backup/MPPDB_globals.sql -p 8000 -g
gs_dumpall[port='8000'][2018-11-14 19:06:24]: dumpall operation successful
gs_dumpall[port='8000'][2018-11-14 19:06:24]: total time: 1150  ms

Example 2: Run gs_dumpall as the cluster administrator omm to export global tablespaces of all databases, encrypt the exported files, and store them in text format.

gs_dumpall -W Bigdata@123 -U omm -f /home/omm/backup/MPPDB_tablespace.sql -p 8000 -t --with-encryption AES128 --with-key 1212121212121212
gs_dumpall[port='8000'][2018-11-14 19:00:58]: dumpall operation successful
gs_dumpall[port='8000'][2018-11-14 19:00:58]: total time: 186  ms

Example 3: Run gs_dumpall as the cluster administrator omm to export global users of all databases. The exported files are in text format.

gs_dumpall -W Bigdata@123 -U omm -f /home/omm/backup/MPPDB_user.sql -p 8000 -r
gs_dumpall[port='8000'][2018-11-14 19:03:18]: dumpall operation successful
gs_dumpall[port='8000'][2018-11-14 19:03:18]: total time: 162  ms

Issue