Oracle版本:Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production,另外,系统有进行了6个节点的RAC
最近系统要“缩容”,原因我不想多说,非常麻烦的一件事情,因为要把数据提出来压缩、存放。
和操作系统无关,主要系Oracle的数据。
Oracle版本:Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
另外,系统有进行了6个节点的RAC集群,,每个表都按照月份或者日期进行了分区。
一、前置工作:
1. 在系统中建立生成dmp文件(导出的数据文件)的目录(一般情况下都需要root权限,这个自由发挥了^_^):
root@bidb04# mkdir -p /data/oracle_backup
root@bidb04# chown oracle:oinstall /data/oracle_backup
另外提个醒,无论你导出导入的时候用的是什么用户和密码登陆,数据库都是用(linux系统中的)oracle用户导出文件的,所以这个目录一定要让(linux系统中的)oracle用户有写权限。
2. 在oracle中定义生成dmp文件(导出的数据文件)的目录:
使用sqlplus / as sysdba进入sqlplus:
sql> grant create any directory to scott; --这一步也可以不用。
sql> create or replace directory oracle_backup as '/data/oracle_backup'; --有了上面那一步,目录也可以使用scott用户建立,当然直接就这么建立就完了。
sql> grant read, write on directory oracle_backup to scott; --赋予目录访问权限。
sql> create or replace directory DATA_PUMP_DIR as '/oracle/app/oracle/product/11.2.0/dbhome_1/rdbms/log/'; --这个貌似我是没有这么建立的,系统自己有了。
sql> grant read, write on directory DATA_PUMP_DIR to scott; --同上备注。
sql> grant EXP_FULL_DATABASE to scott; --导出权限
sql> grant IMP_FULL_DATABASE to scott; --导入权限
二、Data Pump导出(expdp):
expdp CONTENT=PARALLEL=8 FILESIZE=2G ENCRYPTION=data_only ENCRYPTION_PASSWORD=password
备注:
#1. scott/**********@bidb4 (红色部分)用户名密码和SID,这个就和sqlplus登陆的一致了。
#2. TABLES (绿色部分)表名(表名称:分区)
#3. DIRECTORY (蓝色部分)要生成导出文件的目录名--在oracle dba_directories中定义(定义方法见前文)
#4. DUMPFILE (黄色部分)生成的导出文件名%u参数表示对个文件的后缀,与parallel、filesize一起使用
#5. LOGFILE (紫色部分)日志记录文件名称(log目录:log名称,其中log目录在oracle dba_directories中定义)(定义方法见前文)
#6. CONTENT (橙色部分)要包含的内容
#7. CLUSTER (灰色部分)是否使用集群,默认是Y,这里需要N(可以看看后记)
#8. PARALLEL (灰色部分)并行处理
#9. FILESIZE (灰色部分)单个文件最大大小
#10. ENCRYPTION (灰色部分)加密选项1,指定加密内容(附录中有描述参数可选内容)
#11. ENCRYPTION_PASSWORD (灰色部分)加密选项2,指定加密密钥
三、Data Pump导入(impdp):
impdp PARALLEL=8 FILESIZE=2G ENCRYPTION_PASSWORD=password
备注:
基本和expdp的参数配置一致,有区别主要在第2个和第10个,另外,导出的日志名最好稍微修改一下,不然就覆盖掉了。
#2. TABLES (绿色部分)表名(只要表名就好了,不用加上分区,因为导入的数据里面已经包含了分区信息)
#10. ENCRYPTION (不再需要了)

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