Performance Comparison of Oracle data pump in different working modes (II.)

According to Oracle's documentation, the data pump in different ways to export imports, performance can be significantly different, this time just have the opportunity to test, migration table space, direct path, external table, and database chain export, import performance differences.

First check that the table space of the source database satisfies the self contained condition:

Sql> EXEC Dbms_tts. Transport_set_check (' tjsq,tjsq_tmp ')

Pl/sql procedure successfully completed.

Sql> SELECT * from Transport_set_violations;

No rows selected

To set the source database migration table space to read-only state:

sql> ALTER tablespace tjsq READ only;

Tablespace altered.

sql> ALTER tablespace tjsq_tmp READ only;

Tablespace altered.

The following export operations are performed using data pumps for tablespace migration:

Sql> HOST

[Oracle@yans2 ~]$ EXPDP system DIRECTORY=D_DMPDP DUMPFILE=TJSQ_090617_TRANS_TABLESPACE.DP transport_tablespaces=tjsq , tjsq_tmp

Export:release10.2.0.3.0-64bit Production on Wednesday June, 2009 18:07:29

Copyright (c) 2003, +, Oracle. All rights reserved.

Password:

Connected to:oracle database10genterprise Edition release10.2.0.3.0-64bit Production

With the partitioning, OLAP and Data Mining options

Starting "SYSTEM". " Sys_export_transportable_01 ": system/******** DIRECTORY=D_DMPDP DUMPFILE=TJSQ_090617_TRANS_TABLESPACE.DP Transport _TABLESPACES=TJSQ, Tjsq_tmp

Processing Object Type TRANSPORTABLE_EXPORT/PLUGTS_BLK

Processing Object Type Transportable_export/table

Processing Object Type Transportable_export/grant/owner_grant/object_grant

Processing Object Type Transportable_export/index

Processing Object Type Transportable_export/constraint/constraint

Processing Object Type Transportable_export/index_statistics

Processing Object Type Transportable_export/comment

Processing Object Type Transportable_export/constraint/ref_constraint

Processing Object Type Transportable_export/table_statistics

Processing Object Type Transportable_export/post_table_action

Processing Object Type Transportable_export/materialized_view_log

Processing Object Type TRANSPORTABLE_EXPORT/POST_INSTANCE/PLUGTS_BLK

Master table "SYSTEM". " Sys_export_transportable_01 "Successfully loaded/unloaded

******************************************************************************

Dump file set for SYSTEM. SYS_EXPORT_TRANSPORTABLE_01 is:

/data/dmp/tjsq_090617_trans_tablespace.dp

Job "SYSTEM". " Sys_export_transportable_01 "successfully completed at 18:08:30

You can see that because you don't need to export the data in the table, the export operation is done very quickly, with only 1 minutes and 1 seconds.

The following are delivered using the Dbms_file_transfer package:

Sql> SET TIMING on

Sql> EXEC Dbms_file_transfer. Get_file (' D_datafile ', ' tjsq01.dbf ', ' Newdemo ', ' d_datafile ', ' tjsq01.dbf ')

Pl/sql procedure successfully completed.

elapsed:00:30:57.84

Sql> EXEC Dbms_file_transfer. Get_file (' D_datafile ', ' tjsq02.dbf ', ' Newdemo ', ' d_datafile ', ' tjsq02.dbf ')

Pl/sql procedure successfully completed.

elapsed:00:06:29.41

Sql> EXEC Dbms_file_transfer. Get_file (' D_datafile ', ' tjsq_tmp.dbf ', ' Newdemo ', ' d_datafile ', ' tjsq_tmp.dbf ')

Pl/sql procedure successfully completed.

elapsed:00:06:28.63

Sql> EXEC Dbms_file_transfer. Get_file (' D_DMPDP ', ' tjsq_090617_trans_tablespace.dp ', ' Newdemo ', ' d_dmp ', ' TJSQ_TRANS_TABLESPACE.DP ')

Pl/sql procedure successfully completed.