2)expdp / impdp example02 job
1@@@@Monitoring and Control job
   When these tools are running in normal noninteractive mode, you can move into
 interactive mode by typing Control-C
   In interactive mode, the commands that we can issue are:
   ~ADD_FILE to add a new dump file for the export
   ~KILL_JOB to delete the job
   ~STOP_JOB, which will suspend the processing of our job and exit back to the
    operating system.
   ~PARALLEL to alter the degree of parallelism 

After you STOP_JOB, you could continue using ATTACH and JOB_NAME=expfull. If only
one job is running, you could ignore the JOB_NAME.

@@@
@@@<1>create directory for expdp and impdp.
@@@
SYS@ocp> GRANT read,write ON DIRECTORY data_file_dir TO sh;
Grant succeeded.

@@@
@@@<2>control the job process and inspect the report of job.
@@@
[oracle@station78 ~]$ expdp USERID=sh/sh@ocp FULL=y DIRECTORY=data_file_dir \
> DUMPFILE=full_dump_sh.dat JOB_NAME=expfull;

Export: Release 10.2.0.1.0 - 64bit Production on Friday, 24 August, 2012 14:16:02
Copyright (c) 2003, 2005, Oracle.  All rights reserved.

Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
FLASHBACK automatically enabled to preserve database integrity.
Starting "SH"."EXPFULL":  USERID=sh/********@ocp FULL=y DIRECTORY=data_file_dir DUMPFILE=full_dump_sh.dat JOB_NAME=expfull
Estimate in progress using BLOCKS method...
Processing object type DATABASE_EXPORT/SCHEMA/TABLE/TABLE_DATA

Export> stop_job=immediate
Are you sure you wish to stop this job ([yes]/no): yes

[oracle@station78 ~]$ expdp sh/sh@ocp ATTACH=expfull     @@@<==assign the job name to interactive mode.
Export: Release 10.2.0.1.0 - 64bit Production on Friday, 24 August, 2012 14:16:54
Copyright (c) 2003, 2005, Oracle.  All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options

Job: EXPFULL      @@@<==report the job status automatically.
  Owner: SH                            
  Operation: EXPORT                        
  Creator Privs: FALSE                         
  GUID: C7FDE96034E6A140E040A8C04E001653
  Start Time: Friday, 24 August, 2012 14:16:57
  Mode: FULL                          
  Instance: ocp
  Max Parallelism: 1
  EXPORT Job Parameters:
  Parameter Name      Parameter Value:
     CLIENT_COMMAND        USERID=sh/********@ocp FULL=y DIRECTORY=data_file_dir DUMPFILE=full_dump_sh.dat JOB_NAME=expfull
  State: IDLING                        
  Bytes Processed: 0
  Current Parallelism: 1
  Job Error Count: 0
  Dump File: /home/oracle/datafiles/full_dump_sh.dat
    bytes written: 4,096
 
Worker 1 Status:
  State: UNDEFINED                     
  Object Type: DATABASE_EXPORT/GRANT/SYSTEM_GRANT/PROC_SYSTEM_GRANT
  Completed Objects: 7
  Total Objects: 7
  Worker Parallelism: 1

Export> continue_client   @@@<==continue the job to noninteractive mode.
...
...
...
. . exported "SYSTEM"."REPCAT$_USER_PARM_VALUES"             0 KB       0 rows
. . exported "SYSTEM"."SQLPLUS_PRODUCT_PROFILE"              0 KB       0 rows
. . exported "TSMSYS"."SRS$"                                 0 KB       0 rows
Master table "SH"."EXPFULL" successfully loaded/unloaded
******************************************************************************
Dump file set for SH.EXPFULL is:
  /home/oracle/datafiles/full_dump_sh.dat
Job "SH"."EXPFULL" completed with 1 error(s) at 14:20:05