One of the main advantage of datapump is you can suspend the running export or import job and it can be resume if needed. Suppose if your server load is high when you started the export job, you can suspend the job and later you can resume the job once the server load comes down
The ability to detach from and reattach to long-running jobs without affecting the job itself. This allows DBAs and other operations personnel to monitor jobs from multiple locations. The Data Pump Export and Import utilities can be attached to only one job at a time.
To check the master control process table details.
$ sqlplus "/ as sysdba"
SQL*Plus: Release 11.2.0.4.0 - Production on
Copyright (c) 1982, 2008, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Sql> Select * from dba_Datapump_job;
no rows selected
] $ expdp dumpfile=full1.dmp logfile=user.log directory=dp full=y
Username: system/xxxxxxx
=================================================
Sql prompt and check the master control process:
$ sqlplus "/ as sysdba"
SQL*Plus: Release 11.2.0.4.0 - Production on
Copyright (c) 1982, 2008, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Sql> SELECT owner_name, job_name, operation, job_mode, state FROM dba_datapump_jobs;
OWNER_NAME JOB_NAME OPERATION JOB_MODE STATE
---------------------- --------------------------------------------- ---------------------
EXPORT SYS_EXPORT_FULL_02 SYSTEM FULL EXECUTING
Sql> select SID,SERIAL# ,OPNAME,SOFAR,TOTALWORK,to_char(START_TIME,'dd-mon-yy hh:mi') Start_time,to_char(LAST_UPDATE_TIME,'dd-mon-yy hh:mi') Last_updated,time_remaining from gv$session_longops where SOFAR<TOTALWORK;
=================================================
To stop the data pump job:-
] $ ] $ expdp dumpfile=full1.dmp logfile=user.log directory=dp full=y
Username: system/xxxxxxx
Processing object type SCHEMA_EXPORT/SYSTEM_GRANT
Processing object type SCHEMA_EXPORT/DEFAULT_ROLE
Processing object type SCHEMA_EXPORT/PASSWORD_HISTORY
Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA
Processing object type SCHEMA_EXPORT/SEQUENCE/SEQUENCE
Processing object type SCHEMA_EXPORT/TABLE/TABLE
Once you press ^C on the expdp window it will come to interactive mode with
Export> prompt. In that prompt you can give commands to stop_job
Press CTRL+C on export window.
Export> stop_job
Prompt: - Y
Note:- STOP_JOB interactive command, the master table is retained for use in restarting the job.
=================================================
Go to sqlplus window and check the master control process
Sql> SELECT owner_name, job_name, operation, job_mode, state FROM dba_datapump_jobs;
OWNER_NAME JOB_NAME OPERATION JOB_MODE STATE
---------------------- --------------------------------------------- ---------------------
EXPORT SYS_EXPORT_FULL_02 SYSTEM FULL NOT RUNNING
=================================================
To reattach / resume same data pump job:-
] $ expdp system/xxxxxx attach=SYS_EXPORT_FULL_02
Using the below mentioned command you can resume the job. Once you fire the below command in the prompt, expdp will load the job details and come "export>" prompt. You have to give continue_client command to resume the job.
Export> start_job
Export> continue_client
Export: Release 11.2.0.4.0 - 64bit Production on
Copyright (c) 2003, 2007, Oracle. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
=================================================
SQLPLUS prompt
Sql> SELECT owner_name, job_name, operation, job_mode, state FROM dba_datapump_jobs;
OWNER_NAME JOB_NAME OPERATION JOB_MODE STATE
---------------------- --------------------------------------------- ---------------------
EXPORT SYS_EXPORT_FULL_02 SYSTEM FULL EXECUTING
