1.一般测试
ROOTDBA@ora11g>create table t_lob as select * from dba_objects where 1=2;

Table created.

Elapsed: 00:00:00.06
ROOTDBA@ora11g>create table t_char as select * from dba_objects where 1=2;

Table created.

Elapsed: 00:00:00.05
ROOTDBA@ora11g>alter table t_lob add f1_lob clob;

Table altered.

Elapsed: 00:00:00.02
ROOTDBA@ora11g>alter table t_char add f1_char varchar2(4000);

Table altered.

Elapsed: 00:00:00.02
ROOTDBA@ora11g>insert into t_lob select a.*,rpad(’rootdba’,3000,’ rootdba ‘) from dba_objects a  ;

17711 rows created.

Elapsed: 00:00:37.33
ROOTDBA@ora11g>commit;

Commit complete.

Elapsed: 00:00:00.01
ROOTDBA@ora11g>insert into t_char select a.*,rpad(’rootdba’,3000,’ rootdba ‘) from dba_objects a ;

17711 rows created.

Elapsed: 00:00:26.14
ROOTDBA@ora11g>commit;

Commit complete.

Elapsed: 00:00:00.07
ROOTDBA@ora11g>insert into t_lob select * from t_lob;

17711 rows created.

Elapsed: 00:01:11.82
ROOTDBA@ora11g>commit;
Commit complete.

Elapsed: 00:00:00.11
ROOTDBA@ora11g>
ROOTDBA@ora11g>
ROOTDBA@ora11g>insert into t_char select * from t_char;
17711 rows created.

Elapsed: 00:00:43.27
ROOTDBA@ora11g>commit;
Commit complete.

Elapsed: 00:00:00.05
ROOTDBA@ora11g>
ROOTDBA@ora11g>
ROOTDBA@ora11g>
ROOTDBA@ora11g>

ROOTDBA@ora11g>insert into t_char select * from t_char;

35422 rows created.

Elapsed: 00:00:58.76
ROOTDBA@ora11g>commit;
Commit complete.

Elapsed: 00:00:00.10
ROOTDBA@ora11g>
ROOTDBA@ora11g>

oracle@dbatest1:/u01/dmpdir #time expdp rootdba/abc123 directory=dmpdir dumpfile=t_lob.dmp tables=t_lob

Export: Release 11.2.0.1.0 – Production on Wed Sep 30 13:53:48 2009

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 – Production
With the Partitioning, Data Mining and Real Application Testing options
Starting “ROOTDBA”.”SYS_EXPORT_TABLE_01″:  rootdba/******** directory=dmpdir dumpfile=t_lob.dmp tables=t_lob
Estimate in progress using BLOCKS method…
Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 285 MB
Processing object type TABLE_EXPORT/TABLE/TABLE
. . exported “ROOTDBA”.”T_LOB”                           206.0 MB   35422 rows
Master table “ROOTDBA”.”SYS_EXPORT_TABLE_01″ successfully loaded/unloaded
******************************************************************************
Dump file set for ROOTDBA.SYS_EXPORT_TABLE_01 is:
/u01/dmpdir/t_lob.dmp
Job “ROOTDBA”.”SYS_EXPORT_TABLE_01″ successfully completed at 13:54:43

real    0m57.580s
user    0m0.026s
sys     0m0.019s

oracle@dbatest1:/u01/dmpdir #time expdp rootdba/abc123 directory=dmpdir dumpfile=t_char.dmp tables=t_char

Export: Release 11.2.0.1.0 – Production on Wed Sep 30 14:00:03 2009

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 – Production
With the Partitioning, Data Mining and Real Application Testing options
Starting “ROOTDBA”.”SYS_EXPORT_TABLE_01″:  rootdba/******** directory=dmpdir dumpfile=t_char.dmp tables=t_char
Estimate in progress using BLOCKS method…
Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 280 MB
Processing object type TABLE_EXPORT/TABLE/TABLE
. . exported “ROOTDBA”.”T_CHAR”                          209.3 MB   70844 rows
Master table “ROOTDBA”.”SYS_EXPORT_TABLE_01″ successfully loaded/unloaded
******************************************************************************
Dump file set for ROOTDBA.SYS_EXPORT_TABLE_01 is:
/u01/dmpdir/t_char.dmp
Job “ROOTDBA”.”SYS_EXPORT_TABLE_01″ successfully completed at 14:00:36

real    0m33.963s
user    0m0.022s
sys     0m0.023s

2.使用exclude功能

oracle@dbatest1:/u01/dmpdir # expdp rootdba/abc123 directory=dmpdir dumpfile=rootdba.dmp schemas=rootdba EXCLUDE=TABLE:”\=\’T_LOB’”

Export: Release 11.2.0.1.0 – Production on Wed Sep 30 14:09:10 2009

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 – Production
With the Partitioning, Data Mining and Real Application Testing options
FLASHBACK automatically enabled to preserve database integrity.
Starting “ROOTDBA”.”SYS_EXPORT_SCHEMA_01″:  rootdba/******** directory=dmpdir dumpfile=rootdba.dmp schemas=rootdba EXCLUDE=TABLE:\=\’T_LOB’
Estimate in progress using BLOCKS method…
Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 720.1 MB
Processing object type SCHEMA_EXPORT/USER
Processing object type SCHEMA_EXPORT/SYSTEM_GRANT
Processing object type SCHEMA_EXPORT/ROLE_GRANT
Processing object type SCHEMA_EXPORT/DEFAULT_ROLE
Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA
Processing object type SCHEMA_EXPORT/TABLE/TABLE
Processing object type SCHEMA_EXPORT/TABLE/INDEX/INDEX
Processing object type SCHEMA_EXPORT/TABLE/CONSTRAINT/CONSTRAINT
Processing object type SCHEMA_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
Processing object type SCHEMA_EXPORT/TABLE/COMMENT
Processing object type SCHEMA_EXPORT/PROCEDURE/PROCEDURE
Processing object type SCHEMA_EXPORT/PROCEDURE/ALTER_PROCEDURE
Processing object type SCHEMA_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
Processing object type SCHEMA_EXPORT/TABLE/POST_TABLE_ACTION
Processing object type SCHEMA_EXPORT/TABLE/MATERIALIZED_VIEW_LOG
. . exported “ROOTDBA”.”T_CHAR”                          209.3 MB   70844 rows
. . exported “ROOTDBA”.”T_P”:”P40″                       203.1 MB 11835831 rows
. . exported “ROOTDBA”.”T_P”:”P30″                       105.8 MB 6163359 rows
. . exported “ROOTDBA”.”T_P”:”P20″                       52.43 MB 3054408 rows
. . exported “ROOTDBA”.”EXP_DG”                          5.460 KB       4 rows
. . exported “ROOTDBA”.”TP”:”P1″                         5.453 KB       3 rows
. . exported “ROOTDBA”.”T_MV”                            5.437 KB       2 rows
. . exported “ROOTDBA”.”MLOG$_T_MV”                          0 KB       0 rows
. . exported “ROOTDBA”.”TP”:”P2″                             0 KB       0 rows
. . exported “ROOTDBA”.”T_P”:”P10″                           0 KB       0 rows
. . exported “ROOTDBA”.”T_P_LIST”:”P1″                       0 KB       0 rows
. . exported “ROOTDBA”.”T_P_LIST”:”P2″                       0 KB       0 rows
Master table “ROOTDBA”.”SYS_EXPORT_SCHEMA_01″ successfully loaded/unloaded
******************************************************************************
Dump file set for ROOTDBA.SYS_EXPORT_SCHEMA_01 is:
/u01/dmpdir/rootdba.dmp
Job “ROOTDBA”.”SYS_EXPORT_SCHEMA_01″ successfully completed at 14:10:33