11G数据库重放新特性的测试
时间：2010-09-26 来源：TOMSYAN
11G的数据库重放功能，可以捕获某一个数据库的活动，并记录在二进制文件中，
然后将文件复制到测试数据库，进行数据库活动的重新操作。 流程如下：
1、启动捕获进程
2、记录数据库活动到二进制文件中
3、关闭捕获流程，并将二进制文件复制到测试数据库
4、启动重放进程
5、进行数据库活动重演
其中捕获过程通过DBMS_WORKLOAD_CAPTURE包来实现，重放过程通过DBMS_WORKLOAD_REPLAY来实现。
DBMS_WORKLOAD_CAPTURE包可以参考下面链接：
http://download.oracle.com/docs/cd/B28359_01/appdev.111/b28419/d_workload_capture.htm#CHDHFBJE
DBMS_WORKLOAD_REPLAY包可以参考下面链接：
http://download.oracle.com/docs/cd/B28359_01/appdev.111/b28419/d_workload_replay.htm#CHDHHIDH
首先创建测试用户：
SQL> conn / as sysdba
Connected.
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
/oradata/test11g/system01.dbf
/oradata/test11g/sysaux01.dbf
/oradata/test11g/undotbs01.dbf
/oradata/test11g/users01.dbf
/oradata/test11g/example01.dbf
SQL> create tablespace test datafile '/oradata/test11g/test01.dbf' size 50m;
Tablespace created.
SQL> grant connect,resource to test identified by test;
Grant succeeded.
SQL> alter user test default tablespace test;
User altered.
SQL> create restore point sp1;
Restore point created.
SQL> create or replace directory test as '/home/oracle/dbcapture';
Directory created.
SQL> grant all on directory test to test;
Grant succeeded.
测试环境已经建立好。
一、启动捕获进程
SQL> conn system/oracle
Connected.
SQL> EXEC DBMS_WORKLOAD_CAPTURE.START_CAPTURE('CAPTURE1','TEST');
PL/SQL procedure successfully completed.
SQL> SELECT ID,NAME,DBNAME,DBVERSION,DIRECTORY,STATUS FROM DBA_WORKLOAD_CAPTURES;
ID NAME DBNAME DBVERSION DIRECTORY STATUS
---------- ---------- ---------- ---------- ---------- --------------------
1 CAPTURE1 TEST11G 11.2.0.1.0 TEST IN PROGRESS
数据库后台ALERT日志文件中可以看到如下信息：
Sun Sep 26 09:31:18 2010
DBMS_WORKLOAD_CAPTURE.START_CAPTURE(): Starting database capture at 09/26/2010 09:31:17
test对象对应的操作系统目录下将会生成几个文件：
[oracle@dbtest ~]$ ls -l dbcapture/
total 20
drwxr-xr-x 2 oracle oinstall 4096 Sep 26 09:31 cap
drwxr-xr-x 3 oracle oinstall 4096 Sep 26 09:31 capfiles
-rw-r--r-- 1 oracle oinstall 0 Sep 26 09:31 wcr_cap_00001.start
二、模拟数据库活动
SQL> CONN TEST/TEST
ERROR:
ORA-01017: invalid username/password; logon denied
11G的密码已经区分大小写了。
Warning: You are no longer connected to ORACLE.
SQL> conn test/test
Connected.
SQL> CREATE TABLE T(ID INT,NAME VARCHAR2(30));
Table created.
SQL> ! vi insert.sql
INSERT INTO T VALUES(1,'ICOL$');
INSERT INTO T VALUES(2,'I_USER1');
INSERT INTO T VALUES(3,'CON$');
INSERT INTO T VALUES(4,'UNDO$');
INSERT INTO T VALUES(5,'C_COBJ#');
INSERT INTO T VALUES(6,'I_OBJ#');
INSERT INTO T VALUES(7,'PROXY_ROLE_DATA$');
INSERT INTO T VALUES(8,'I_IND1');
INSERT INTO T VALUES(9,'I_CDEF2');
INSERT INTO T VALUES(10,'I_OBJ5');
INSERT INTO T VALUES(11,'I_PROXY_ROLE_DATA$_1');
INSERT INTO T VALUES(12,'FILE$');
INSERT INTO T VALUES(13,'UET$');
INSERT INTO T VALUES(14,'I_FILE#_BLOCK#');
INSERT INTO T VALUES(15,'I_FILE1');
INSERT INTO T VALUES(16,'I_CON1');
INSERT INTO T VALUES(17,'I_OBJ3');
INSERT INTO T VALUES(18,'I_TS#');
INSERT INTO T VALUES(19,'I_CDEF4');
INSERT INTO T VALUES(20,'IND$');
INSERT INTO T VALUES(21,'SEG$');
INSERT INTO T VALUES(22,'C_TS#');
。。。。。
SQL> @insert.sql
省略显示。
SQL> COMMIT;
Commit complete.
SQL> SELECT COUNT(1) FROM T;
COUNT(1)
----------
10000
三、结束捕获进程
SQL> conn system/oracle
Connected.
SQL> EXEC DBMS_WORKLOAD_CAPTURE.FINISH_CAPTURE;
PL/SQL procedure successfully completed.
SQL> SELECT ID,NAME,DBNAME,DBVERSION,DIRECTORY,STATUS FROM DBA_WORKLOAD_CAPTURES;
ID NAME DBNAME DBVERSION DIRECTORY STATUS
---------- ---------- ---------- ---------- ---------- --------------------
1 CAPTURE1 TEST11G 11.2.0.1.0 TEST COMPLETED
从后台ALERT文件中可以看到如下信息：
Sun Sep 26 10:18:09 2010
DBMS_WORKLOAD_CAPTURE.FINISH_CAPTURE(): Stopped database capture
(not all sessions could flush their capture buffers) at 09/26/2010 10:18:09
此时数据库的活动全部记录在以下目录中的文件中
[oracle@dbtest ~]$ ls -l dbcapture/
total 16
drwxr-xr-x 2 oracle oinstall 4096 Sep 26 10:18 cap
drwxr-xr-x 3 oracle oinstall 4096 Sep 26 09:31 capfiles
四、闪回到SP1时刻
由于只有一个11G的数据库环境，因此重放也是在这个数据库中进行的。此时
需要闪回到以前创建表的时候，以便观察。
SQL> CONN / AS SYSDBA
Connected.
SQL> SHUTDOWN IMMEDIATE
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> STARTUP MOUNT
ORACLE instance started.
Total System Global Area 343154688 bytes
Fixed Size 1336428 bytes
Variable Size 260049812 bytes
Database Buffers 75497472 bytes
Redo Buffers 6270976 bytes
Database mounted.
SQL> FLASHBACK DATABASE TO RESTORE POINT SP1;
Flashback complete.
SQL> ALTER DATABASE OPEN RESETLOGS;
Database altered.
SQL> CONN TEST/test
Connected.
SQL> select tname from tab;
no rows selected
SQL> create or replace directory test as '/home/oracle/dbcapture';
Directory created.
SQL> grant all on directory test to test;
Grant succeeded.
五、准备重放进程
首先进行预处理
SQL> EXEC DBMS_WORKLOAD_REPLAY.PROCESS_CAPTURE('TEST');
PL/SQL procedure successfully completed.
SQL> EXEC DBMS_WORKLOAD_REPLAY.INITIALIZE_REPLAY('REPLAY1','TEST');
PL/SQL procedure successfully completed.
SQL> EXEC DBMS_WORKLOAD_REPLAY.PREPARE_REPLAY;
PL/SQL procedure successfully completed.
以ORACLE用户登录到操作系统中，启动重放客户端
[oracle@dbtest ~]$ wrc userid=system password=oracle replaydir=/home/oracle/dbcapture/
Workload Replay Client: Release 11.2.0.1.0 - Production on Sun Sep 26 10:47:24 2010
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
Wait for the replay to start (10:47:24)
此时可以看到等待重放。
重新回到SQLPLUS下：
六、开始重放
SQL> EXEC DBMS_WORKLOAD_REPLAY.START_REPLAY;
PL/SQL procedure successfully completed.
SQL> SELECT ID,NAME,DBNAME,DBVERSION,DIRECTORY,STATUS FROM DBA_WORKLOAD_REPLAYS;
ID NAME DBNAME DBVERSION DIRECTORY STATUS
---------- ---------- ---------- ---------- ---------- --------------------
1 REPLAY1 TEST11G 11.2.0.1.0 TEST IN PROGRESS
此时可以看到重放客户端会出现 Replay started
[oracle@dbtest ~]$ wrc userid=system password=oracle replaydir=/home/oracle/dbcapture/
Workload Replay Client: Release 11.2.0.1.0 - Production on Sun Sep 26 10:47:24 2010
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
Wait for the replay to start (10:47:24)
Replay started (10:49:01)
ALERT文件中会出现：
Sun Sep 26 10:49:01 2010
DBMS_WORKLOAD_REPLAY.START_REPLAY(): Starting database replay at 09/26/2010 10:49:00
重放完成后，DBA_WORKLOAD_REPLAYS的STATUS列会标记为COMPLETED.
SQL> SELECT ID,NAME,DBNAME,DBVERSION,DIRECTORY,STATUS FROM DBA_WORKLOAD_REPLAYS;
ID NAME DBNAME DBVERSION DIRECTORY STATUS
---------- ---------- ---------- ---------- ---------- --------------------
1 REPLAY1 TEST11G 11.2.0.1.0 TEST COMPLETED
重放客户端会自动退出
[oracle@dbtest ~]$ wrc userid=system password=oracle replaydir=/home/oracle/dbcapture/
Workload Replay Client: Release 11.2.0.1.0 - Production on Sun Sep 26 10:47:24 2010
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
Wait for the replay to start (10:47:24)
Replay started (10:49:01)
Replay finished (11:35:30)
[oracle@dbtest ~]$
10000条记录，竟然重放了1个小时，可能和虚拟机有关系。
ALERT日志文件记录如下内容：
Sun Sep 26 11:34:07 2010
DBMS_WORKLOAD_REPLAY: Database replay ran to completion at 09/26/2010 11:34:07
Sun Sep 26 11:34:24 2010
DM00 started with pid=34, OS id=5583, job SYS.SYS_EXPORT_TABLE_01
Sun Sep 26 11:34:30 2010
DW00 started with pid=35, OS id=5585, wid=1, job SYS.SYS_EXPORT_TABLE_01
怀疑数据是通过数据泵导入的。
SQL> CONN TEST/test
Connected.
SQL> SELECT COUNT(1) FROM T;
COUNT(1)
----------
10000
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