Centos610-oracle Backup and Restore

1. Preparations

　　1.0 Import account ready　　　　

create tablespace EXPDP_DATA datafile '/home/oracle/app/oracle/oradata/EXPDP_DATA.dbf' size 100m autoextend on  next 50m maxsize 10240m  extent management local; 
create temporary tablespace EXPDP_TEMP   tempfile '/home/oracle/app/oracle/oradata/EXPDP_TEMP.DBF' size 50m  autoextend on  next 50m maxsize 10240m  extent management local;
create user EXPDP_USER identified by 123456  account unlock default tablespace EXPDP_DATA  TEMPORARY TABLESPACE EXPDP_TEMP; 
grant connect,resource to EXPDP_USER;

 

　　1.1.xshell: oracle account login

　　　　mkdir ora_back;

　　　　View directory: pwd show / home / oracle / ora_back

　　1.2oracle new logical directory

　　　　create directory ora_back as '/home/oracle/ora_back/';

　　　　Check the directory exists

　　　　select * from dba_directories;

　　　　

 

 　　1.3 Authorization logical directory account

　　　　the Read Grant, ON Directory ora_back the Write to scott ; export directory objects authorized account (where the backup operation is recommended to use system account, scott paper, for example).

　　　　the Read Grant, ON Directory ora_back the Write to EXPDP_USER ; import directory objects authorized account

　　 1.4 Setting oracle export support

　　　　exec dbms_metadata_util.load_stylesheets;

　　  Export account 0 1.5 Setting record sheet supports exporting (already set, you do not need to be performed again)

　　　　select table_name from user_tables where NUM_ROWS=0;

　　　　alter table table1 allocate extend; (derived support table disposed specified)

　　　　select 'alter table' || table_name || 'allocate extent;' from user_tables where num_rows = 0; (empty support table derived added)

　　   1.6 supports the new table automatically exported (already set, you do not need to be performed again)

　　　　sqlplus:　　　　

　　　　　　show parameter deferred_segment_creation

　　　　　　alter system set deferred_segment_creation=false

 

2. Export Import

　　2.1expdp main parameters:

　　　　　TABLES = table name needs to be exported 1, table 2

　　　　　TABLESPACES = need to export the table space

　　　　　VERSION = oracle version number to be imported

　　　　　SCHEMAS = list of programs need to be exported

　　　　　JOB_NAME = Export job name

　　　　　INCLUDE = the specific subject in need thereof comprising

　　　　　FULL = Y / N whether to export the entire library

　　　　　DIRECTORY = Directory object to store the exported file

　　2.2 Export Operations

　　　　linux terminal mode (non sqlplus mode) execute the following export statement

　　　　expdp scott/orcl directory=ora_back dumpfile=scott_expdp.dmp schemas=scott

　　　　Results of the:

　　　　　　　　　　

3 Import work

　　3.1 import parameters

　　　　remap_schema = login account Export: Import account login

　　　　dumpfile = dmp backup files

　　　　table_exists_action = take replacement strategy as replace existing objects (SKIP | APPEND | TRUNCATE | FRPLACE)

　　　　directory = directory object

　　　　

　　3.2 import
　　　　linux terminal mode (non sqlplus mode) execute the following export statement

　　　　impdp EXPDP_USER/123456 directory=ora_back dumpfile=scott_expdp.dmp TABLE_EXISTS_ACTION=REPLACE remap_schema=SCOTT:EXPDP_USER

　　　　执行结果：

　　　　　　

 

 　　3.3导入对比：

　　　　　　导入前：

　　　　　　　　 

 

 

 

　　　　　　导入后：

　　　　　　　　

 

　　　　　　对比结果表明导出导入操作Ok