Oracle Study之--Oracle 11gR2通过RMAN克隆数据库

Purpose of Database Duplication

A duplicate database is useful for a variety of purposes, most of which involve testing. You can perform the following tasks in a duplicate database:

  • Test backup and recovery procedures

  • Test an upgrade to a new release of Oracle Database

  • Test the effect of applications on database performance

  • Create a standby database

  • Generate reports

Techniques for Duplicating a Database

RMAN supports two basic types of duplication: active database duplication and backup-based duplication. RMAN can perform backup-based duplication with or without either of the following connections:

  • Target

  • Recovery catalog

A connection to both is required for active database duplication.

Figure 24-1 shows
the decision tree for the two duplication techniques.

Active Database Duplication

In active
database duplication, RMAN connects as TARGET to the source database instance and as AUXILIARY to the auxiliary instance. RMAN copies the live source database over the network to the auxiliary instance, thereby creating
the duplicate database. No backups of the source database are required. Figure
24-2 illustrates active database duplication.

watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="">

     Oracle 11g的RMAN
duplicate 能够通过Active database duplicate和Backup-based duplicate两种方法实现。本案例使用的是Active database
duplicate，对于Active database duplicate来说，在克隆数据库时不用对Source备份，这对于大数据特别是T级别的数据库来说长处很明显，复制前不须要进行备份，降低了备份和传送备份的时间，同一时候节省备份空间。



    克隆数据库通常是在不同的主机上来完毕，本案例是測试环境，所以在一台主机上完毕。


1、Source 库信息
[oracle@rh64 ~]$sqlplus '/as sysdba'

SQL*Plus: Release 11.2.0.3.0 Production on Thu Mar 24 16:30:48 2016

Copyright (c) 1982, 2011, Oracle.  All rights reserved.

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

16:30:48 SYS@ prod>select status from v$instance;

STATUS

------------

OPEN

16:31:12 SYS@ prod>select name from v$datafile;

NAME

------------------------------------------------------------------------------------------------------------------------

/u01/app/oracle/oradata/prod/system01.dbf

/u01/app/oracle/oradata/prod/sysaux01.dbf

/u01/app/oracle/oradata/prod/undotbs01.dbf

/u01/app/oracle/oradata/prod/users01.dbf

/u01/app/oracle/oradata/prod/example01.dbf

/u01/app/oracle/oradata/prod/test1.dbf

6 rows selected.

16:37:41 SYS@ prod>select member from v$logfile;

MEMBER

------------------------------------------------------------------------------------------------------------------------

/u01/app/oracle/oradata/prod/redo03.log

/u01/app/oracle/oradata/prod/redo02.log

/u01/app/oracle/oradata/prod/redo01.log

16:38:43 SYS@ prod>show parameter name

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

db_file_name_convert                 string

db_name                              string      prod

db_unique_name                       string      prod

global_names                         boolean     FALSE

instance_name                        string      prod

lock_name_space                      string

log_file_name_convert                string

processor_group_name                 string

service_names                        string      prod
2、构建測试库：



1）測试库文件夹环境

[root@rh64 dsk3]# cd test1/

[root@rh64 test1]# ls

oradata  logs admin



2）生成測试库pfile

[oracle@rh64 dbs]$ cat inittest1.ora 

*.audit_file_dest='/dsk3/test1/admin/adump'

*.audit_trail='db'

*.compatible='11.2.0.0.0'

*.control_files='/dsk3/test1/oradata/control01.ctl'

*.db_block_size=8192

*.db_domain=''

*.db_name='test1'

*.diagnostic_dest='/u01/app/oracle'

*.memory_target=319430400

*.open_cursors=300

*.processes=150

*.remote_login_passwordfile='EXCLUSIVE'

*.undo_tablespace='UNDOTBS1'

*.db_file_name_convert=('/u01/app/oracle/oradata/prod/','/dsk3/test1/oradata/')        。假设源库和目标库在同一台主机，须要配置文件存储路径转换參数

*.log_file_name_convert=('/u01/app/oracle/oradata/prod/','/dsk3/test1/logs/')
3）生成口令文件

[oracle@rh64 dbs]$ cp orapwprod orapwtest1



4）启动Auxiliary Instance到no mount
16:52:01 SYS@ test1>startup nomount;

ORACLE instance started.

Total System Global Area  521936896 bytes

Fixed Size                  2229944 bytes

Variable Size             314575176 bytes

Database Buffers          201326592 bytes

Redo Buffers                3805184 bytes

16:52:13 SYS@ test1>show parameter name

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

db_file_name_convert                 string      /u01/app/oracle/oradata/prod/,

                                                                     /dsk3/test1/oradata/

db_name                                 string      test1

db_unique_name                    string      test1

global_names                         boolean     FALSE

instance_name                        string      test1

lock_name_space                   string

log_file_name_convert            string        /u01/app/oracle/oradata/prod/,

                                                                  /dsk3/test1/logs/

processor_group_name           string

service_names                        string      test1
三、配置网络Listener 和 tnsname
因为Auxiliary Instance仅仅能启动到no mount状态，所以须要在listener里配置Auxiliary Instance为静态注冊。以便RMAN进行连接。
1）配置监听器

[oracle@rh64 admin]$ cat listener.ora 

# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.ora

# Generated by Oracle configuration tools.

LISTENER =

  (DESCRIPTION_LIST =

    (DESCRIPTION =

      (ADDRESS = (PROTOCOL = TCP)(HOST = rh64)(PORT = 1521))

      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))

    )

  )

ADR_BASE_LISTENER = /u01/app/oracle
# 静态注冊Auxiliary Instance：test1

SID_LIST_LISTENER =

  (SID_LIST =

    (SID_DESC =

      (GLOBAL_DBNAME = test1)

      (ORACLE_HOME = /u01/app/oracle/product/11.2.0/db_1)

      (SID_NAME = test1)

    )

  )


2）配置tnsnames

[oracle@rh64 admin]$ cat tnsnames.ora 

# tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db_1/network/admin/tnsnames.ora

# Generated by Oracle configuration tools.

PROD =

  (DESCRIPTION =

    (ADDRESS = (PROTOCOL = TCP)(HOST = rh64)(PORT = 1521))

    (CONNECT_DATA =

      (SERVER = DEDICATED)

      (SERVICE_NAME = prod)

    )

  )

TEST1 =

  (DESCRIPTION =

    (ADDRESS = (PROTOCOL = TCP)(HOST = rh64)(PORT = 1521))

    (CONNECT_DATA =

      (SERVER = DEDICATED)

      (SERVICE_NAME = test1)

    )

  )
3）查看listener信息

 [oracle@rh64 admin]$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 24-MAR-2016 17:44:04

Copyright (c) 1991, 2011, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=rh64)(PORT=1521)))

STATUS of the LISTENER

------------------------

Alias                     LISTENER

Version                   TNSLSNR for Linux: Version 11.2.0.3.0 - Production

Start Date                24-MAR-2016 17:43:17

Uptime                    0 days 0 hr. 0 min. 46 sec

Trace Level               off

Security                  ON: Local OS Authentication

SNMP                      OFF

Listener Parameter File   /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.ora

Listener Log File         /u01/app/oracle/diag/tnslsnr/rh64/listener/alert/log.xml

Listening Endpoints Summary...

  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rh64.cuug.cn)(PORT=1521)))

  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))

Services Summary...

Service "prod" has 1 instance(s).

  Instance "prod", status READY, has 1 handler(s) for this service...

Service "prodXDB" has 1 instance(s).

  Instance "prod", status READY, has 1 handler(s) for this service...

Service "test1" has 1 instance(s).

  Instance "test1", status UNKNOWN, has 1 handler(s) for this service...           ；；Auxiliary Instance静态注冊后，状态为“UNKNOWN"

The command completed successfully

四、配置RMAN克隆

[oracle@rh64 admin]$ rman target sys/oracle@prod auxiliary sys/oracle@test1

Recovery Manager: Release 11.2.0.3.0 - Production on Thu Mar 24 17:07:38 2016

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

connected to target database: PROD (DBID=305104131)

connected to auxiliary database: TEST1 (not mounted)



RMAN> duplicate database to test1 from active database nofilenamecheck;

Starting Duplicate Db at 24-MAR-16

using target database control file instead of recovery catalog

allocated channel: ORA_AUX_DISK_1

channel ORA_AUX_DISK_1: SID=20 device type=DISK

contents of Memory Script:

{

   sql clone "create spfile from memory";

}

executing Memory Script

sql statement: create spfile from memory

contents of Memory Script:

{

   shutdown clone immediate;

   startup clone nomount;

}

executing Memory Script

Oracle instance shut down

connected to auxiliary database (not started)

Oracle instance started

Total System Global Area     321507328 bytes

Fixed Size                     2228024 bytes

Variable Size                230686920 bytes

Database Buffers              83886080 bytes

Redo Buffers                   4706304 bytes

contents of Memory Script:

{

   sql clone "alter system set  db_name =

 ''PROD'' comment=

 ''Modified by RMAN duplicate'' scope=spfile";

   sql clone "alter system set  db_unique_name =

 ''TEST1'' comment=

 ''Modified by RMAN duplicate'' scope=spfile";

   shutdown clone immediate;

   startup clone force nomount

   backup as copy current controlfile auxiliary format  '/dsk3/test1/oradata/control01.ctl';

   alter clone database mount;

}

executing Memory Script

sql statement: alter system set  db_name =  ''PROD'' comment= ''Modified by RMAN duplicate'' scope=spfile

sql statement: alter system set  db_unique_name =  ''TEST1'' comment= ''Modified by RMAN duplicate'' scope=spfile

Oracle instance shut down

Oracle instance started

Total System Global Area     321507328 bytes

Fixed Size                     2228024 bytes

Variable Size                230686920 bytes

Database Buffers              83886080 bytes

Redo Buffers                   4706304 bytes

Starting backup at 24-MAR-16

allocated channel: ORA_DISK_1

channel ORA_DISK_1: SID=34 device type=DISK

channel ORA_DISK_1: starting datafile copy

copying current control file

output file name=/u01/app/oracle/product/11.2.0/db_1/dbs/snapcf_prod.f tag=TAG20160324T175437 RECID=3 STAMP=907350882

channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:07

Finished backup at 24-MAR-16

database mounted

contents of Memory Script:

{

   set newname for datafile  1 to

 "/dsk3/test1/data/system01.dbf";

   set newname for datafile  2 to

 "/dsk3/test1/data/sysaux01.dbf";

   set newname for datafile  3 to

 "/dsk3/test1/data/undotbs01.dbf";

   set newname for datafile  4 to

 "/dsk3/test1/data/users01.dbf";

   set newname for datafile  5 to

 "/dsk3/test1/data/example01.dbf";

   set newname for datafile  6 to

 "/dsk3/test1/data/test1.dbf";

   backup as copy reuse

   datafile  1 auxiliary format

 "/dsk3/test1/data/system01.dbf"   datafile

 2 auxiliary format

 "/dsk3/test1/data/sysaux01.dbf"   datafile

 3 auxiliary format

 "/dsk3/test1/data/undotbs01.dbf"   datafile

 4 auxiliary format

 "/dsk3/test1/data/users01.dbf"   datafile

 5 auxiliary format

 "/dsk3/test1/data/example01.dbf"   datafile

 6 auxiliary format

 "/dsk3/test1/data/test1.dbf"   ;

   sql 'alter system archive log current';

}

executing Memory Script

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

Starting backup at 24-MAR-16

using channel ORA_DISK_1

channel ORA_DISK_1: starting datafile copy

input datafile file number=00001 name=/u01/app/oracle/oradata/prod/system01.dbf

output file name=/dsk3/test1/oradata/system01.dbf tag=TAG20160324T180122

channel ORA_DISK_1: datafile copy complete, elapsed time: 00:01:45

channel ORA_DISK_1: starting datafile copy

input datafile file number=00002 name=/u01/app/oracle/oradata/prod/sysaux01.dbf

output file name=/dsk3/test1/oradata/sysaux01.dbf tag=TAG20160324T180122

channel ORA_DISK_1: datafile copy complete, elapsed time: 00:01:35

channel ORA_DISK_1: starting datafile copy

input datafile file number=00005 name=/u01/app/oracle/oradata/prod/example01.dbf

output file name=/dsk3/test1/oradata/example01.dbf tag=TAG20160324T180122

channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:55

channel ORA_DISK_1: starting datafile copy

input datafile file number=00003 name=/u01/app/oracle/oradata/prod/undotbs01.dbf

output file name=/dsk3/test1/oradata/undotbs01.dbf tag=TAG20160324T180122

channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:15

channel ORA_DISK_1: starting datafile copy

input datafile file number=00006 name=/u01/app/oracle/oradata/prod/test1.dbf

output file name=/dsk3/test1/oradata/test1.dbf tag=TAG20160324T180122

channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:07

channel ORA_DISK_1: starting datafile copy

input datafile file number=00004 name=/u01/app/oracle/oradata/prod/users01.dbf

output file name=/dsk3/test1/oradata/users01.dbf tag=TAG20160324T180122

channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:03

Finished backup at 24-MAR-16

sql statement: alter system archive log current

contents of Memory Script:

{

   backup as copy reuse

   archivelog like  "/dsk4/arch_prod/arch_1_32_893265808.log" auxiliary format

 "/u01/app/oracle/product/11.2.0/db_1/dbs/arch1_32_893265808.dbf"   ;

   catalog clone archivelog  "/u01/app/oracle/product/11.2.0/db_1/dbs/arch1_32_893265808.dbf";

   switch clone datafile all;

}

executing Memory Script

Starting backup at 24-MAR-16

using channel ORA_DISK_1

channel ORA_DISK_1: starting archived log copy

input archived log thread=1 sequence=32 RECID=26 STAMP=907351568

output file name=/u01/app/oracle/product/11.2.0/db_1/dbs/arch1_32_893265808.dbf RECID=0 STAMP=0

channel ORA_DISK_1: archived log copy complete, elapsed time: 00:00:01

Finished backup at 24-MAR-16

cataloged archived log

archived log file name=/u01/app/oracle/product/11.2.0/db_1/dbs/arch1_32_893265808.dbf RECID=26 STAMP=907351572

datafile 1 switched to datafile copy

input datafile copy RECID=4 STAMP=907351573 file name=/dsk3/test1/oradata/system01.dbf

datafile 2 switched to datafile copy

input datafile copy RECID=5 STAMP=907351573 file name=/dsk3/test1/oradata/sysaux01.dbf

datafile 3 switched to datafile copy

input datafile copy RECID=6 STAMP=907351574 file name=/dsk3/test1/oradata/undotbs01.dbf

datafile 4 switched to datafile copy

input datafile copy RECID=7 STAMP=907351574 file name=/dsk3/test1/oradata/users01.dbf

datafile 5 switched to datafile copy

input datafile copy RECID=8 STAMP=907351574 file name=/dsk3/test1/oradata/example01.dbf

datafile 6 switched to datafile copy

input datafile copy RECID=9 STAMP=907351574 file name=/dsk3/test1/oradata/test1.dbf

contents of Memory Script:

{

   set until scn  1471172;

   recover

   clone database

    delete archivelog

   ;

}

executing Memory Script

executing command: SET until clause

Starting recover at 24-MAR-16

allocated channel: ORA_AUX_DISK_1

channel ORA_AUX_DISK_1: SID=18 device type=DISK

starting media recovery

archived log for thread 1 with sequence 32 is already on disk as file /u01/app/oracle/product/11.2.0/db_1/dbs/arch1_32_893265808.dbf

archived log file name=/u01/app/oracle/product/11.2.0/db_1/dbs/arch1_32_893265808.dbf thread=1 sequence=32

media recovery complete, elapsed time: 00:00:05

Finished recover at 24-MAR-16

Oracle instance started

Total System Global Area     321507328 bytes

Fixed Size                     2228024 bytes

Variable Size                234881224 bytes

Database Buffers              79691776 bytes

Redo Buffers                   4706304 bytes

contents of Memory Script:

{

   sql clone "alter system set  db_name =

 ''TEST1'' comment=

 ''Reset to original value by RMAN'' scope=spfile";

   sql clone "alter system reset  db_unique_name scope=spfile";

   shutdown clone immediate;

   startup clone nomount;

}

executing Memory Script

sql statement: alter system set  db_name =  ''TEST1'' comment= ''Reset to original value by RMAN'' scope=spfile

sql statement: alter system reset  db_unique_name scope=spfile

Oracle instance shut down

connected to auxiliary database (not started)

Oracle instance started

Total System Global Area     321507328 bytes

Fixed Size                     2228024 bytes

Variable Size                234881224 bytes

Database Buffers              79691776 bytes

Redo Buffers                   4706304 bytes

sql statement: CREATE CONTROLFILE REUSE SET DATABASE "TEST1" RESETLOGS ARCHIVELOG

  MAXLOGFILES     16

  MAXLOGMEMBERS      3

  MAXDATAFILES      100

  MAXINSTANCES     8

  MAXLOGHISTORY      292

 LOGFILE

  GROUP   1 ( '/dsk3/test1/logs/''redo01.log' ) SIZE 50 M  REUSE,

  GROUP   2 ( '/dsk3/test1/logs/''redo02.log' ) SIZE 50 M  REUSE,

  GROUP   3 ( '/dsk3/test1/logs/''redo03.log' ) SIZE 50 M  REUSE

 DATAFILE

  '/dsk3/test1/oradata/system01.dbf'

 CHARACTER SET ZHS16GBK

contents of Memory Script:

{

   set newname for tempfile  1 to

 "/dsk3/test1/oradata/temp01.dbf";

   switch clone tempfile all;

   catalog clone datafilecopy  "/dsk3/test1/oradata/sysaux01.dbf",

 "/dsk3/test1/oradata/undotbs01.dbf",

 "/dsk3/test1/oradata/users01.dbf",

 "/dsk3/test1/oradata/example01.dbf",

 "/dsk3/test1/oradata/test1.dbf";

   switch clone datafile all;

}

executing Memory Script

executing command: SET NEWNAME

renamed tempfile 1 to /dsk3/test1/oradata/temp01.dbf in control file

cataloged datafile copy

datafile copy file name=/dsk3/test1/oradata/sysaux01.dbf RECID=1 STAMP=907351727

cataloged datafile copy

datafile copy file name=/dsk3/test1/oradata/undotbs01.dbf RECID=2 STAMP=907351728

cataloged datafile copy

datafile copy file name=/dsk3/test1/oradata/users01.dbf RECID=3 STAMP=907351728

cataloged datafile copy

datafile copy file name=/dsk3/test1/oradata/example01.dbf RECID=4 STAMP=907351728

cataloged datafile copy

datafile copy file name=/dsk3/test1/oradata/test1.dbf RECID=5 STAMP=907351729

datafile 2 switched to datafile copy

input datafile copy RECID=1 STAMP=907351727 file name=/dsk3/test1/oradata/sysaux01.dbf

datafile 3 switched to datafile copy

input datafile copy RECID=2 STAMP=907351728 file name=/dsk3/test1/oradata/undotbs01.dbf

datafile 4 switched to datafile copy

input datafile copy RECID=3 STAMP=907351728 file name=/dsk3/test1/oradata/users01.dbf

datafile 5 switched to datafile copy

input datafile copy RECID=4 STAMP=907351728 file name=/dsk3/test1/oradata/example01.dbf

datafile 6 switched to datafile copy

input datafile copy RECID=5 STAMP=907351729 file name=/dsk3/test1/oradata/test1.dbf

Reenabling controlfile options for auxiliary database

Executing: alter database enable block change tracking using file '/dsk4/backup/block.trc'

ORACLE error from auxiliary database: ORA-19751: could not create the change tracking file

ORA-19750: change tracking file: '/dsk4/backup/block.trc'

ORA-27038: created file already exists

Additional information: 1

Ignoring error, reattempt command after duplicate finishes

contents of Memory Script:

{

   Alter clone database open resetlogs;

}

executing Memory Script

database opened

Finished Duplicate Db at 24-MAR-16

五、验证克隆

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

18:28:57 SYS@ test1>select status from v$instance;

STATUS

------------

OPEN

18:29:06 SYS@ test1>select name from v$datafile;

NAME

------------------------------------------------------------------------------------------------------------------------

/dsk3/test1/oradata/system01.dbf

/dsk3/test1/oradata/sysaux01.dbf

/dsk3/test1/oradata/undotbs01.dbf

/dsk3/test1/oradata/users01.dbf

/dsk3/test1/oradata/example01.dbf

/dsk3/test1/oradata/test1.dbf

6 rows selected.

18:29:13 SYS@ test1>select member from v$logfile;

MEMBER

------------------------------------------------------------------------------------------------------------------------

/dsk3/test1/logs/redo03.log

/dsk3/test1/logs/redo02.log

/dsk3/test1/logs/redo01.log

18:30:19 SYS@ test1>show parameter control

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

control_files                        string      /dsk3/test1/oradata/control01.ctl  <span style="font-family: 宋体, Arial; background-color: rgb(255, 255, 255);">       </span>

-------- 至此。数据库克隆成功 。                                     

Oracle Study之--Oracle 11gR2通过RMAN克隆数据库的更多相关文章

  1. Oracle Study之--Oracle 单实例11.2.0.1.0升级到11.2.0.3.0

    Oracle Study之--Oracle 单实例11.2.0.1.0升级到11.2.0.3.0 系统环境: 操作系统:RedHat EL6(64位) Oracle:    Oracle 11gR2 ...

  2. 示例在同一台机器上使用RMAN克隆数据库

    1.查看主库ZDJS并使用RMAM进行备份 [oracle@std ~]$ sqlplus '/as sysdba' SQL*Plus: Release - Production on Wed Jan ...

  3. Oracle 11gR2 使用RMAN Duplicate复制数据库

    Oracle 11gR2 使用RMAN Duplicate复制数据库     前言:     上周刚做完一个项目,用户要求RAC的数据库可以自己主动备份到另外一个单节点上,单节点可以正常拿起来就能用. ...

  4. Oracle 11g 中恢复管理器RMAN介绍

    这是我平时摘录的笔记,从管理艺术那本书上摘录出来的,放到这里 RMAN 可在数据库服务器的帮助下从数据库内备份数据文件,可构造数据文件映像副本.控制文件和控制文件映像.对当日志 SPFILE 和RMA ...

  5. oracle RMAN复制数据库

    列出创建副本数据库的目的 • 选择用于复制数据库的方法 • 使用RMAN 复制数据库 • 使用RMAN 备份复制数据库 • 基于正在运行的实例复制数据库   使用副本数据库 • 使用副本数据库可执行以 ...

  6. Oracle使用rman备份数据库时出现cannot reclaim的错误

    1. 按照<2 day DBA>中的guide,设置fast recovery area. SQL> ALTER SYSTEM SET DB_RECOVERY_FILE_DEST_S ...

  7. Oracle RMAN 恢复数据库到不同主机（二）

    我们在recover database时报一个错误: RMAN-06054: media recovery requesting unknown archived log for thread 1 w ...

  8. Oracle RMAN 恢复数据库到不同主机（一）

    一.RMAN 备份的内容 RMAN做数据库全备时包含了 数据文件.归档日志.控制文件和参数文件和备份日志,如下: arch_20160223_08qukp2t_1_1  arch_20160223_0 ...

  9. Oracle Study之-AIX6.1构建Oracle 10gR2 RAC(3)

    Oracle Study之-AIX6.1构建Oracle 10gR2 RAC(3) 一.配置共享存储 [oracle@aix203 ~]$lsdev -c disk hdisk0 Available ...

随机推荐

  1. Jmeter接口测试---get和post及解决乱码问题

    Jmeter接口测试---get请求 1.创建一个线程组 测试计划---添加---Threads ---线程组 2.添加http请求,步骤如下图所示: 3.添加带有参数的get请求,如下图展示内容: ...

  2. 读《实战GUI产品的自动化测试》：第一步——了解自动化测试，简单RFT的录制回放实例

    1.了解自动化测试,什么是自动化测试?(可以参数百度百科“自动化测试”) 2.了解自动化测试 * 自动化测试如何改善产品的质量 * 自动化测试无法完全替代手工测试 * 自动化测试无法发现新的问题——适 ...

  3. POJ_1088_(dp)(记忆化搜索)

    滑雪 Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 95792   Accepted: 36322 Description ...

  4. codeforces_302D

    D. Yaroslav and Time time limit per test 2 seconds memory limit per test 256 megabytes input standar ...

  5. Scrapy框架 之某网站产品采集案例

    一.创建项目 第一步:scrapy startproject boyuan 第二步:cd boyuan scrapy genspider product -t crawl  boyuan.com 如图 ...

  6. axios方法封装

    axios方法封装 一般情况下,我们会用到的方法有:GET,POST,PUT,PATCH,封装方法如下:     五.封装后的方法的使用 1.在main.js文件里引用之前写好的文件,我的命名为htt ...

  7. Vue2.0 —生命周期和钩子函数

    vue生命周期简介 咱们从上图可以很明显的看出现在vue2.0都包括了哪些生命周期的函数了. 生命周期探究 对于执行顺序和什么时候执行,看上面两个图基本有个了解了.下面我们将结合代码去看看钩子函数的执 ...

  8. ThinkPHP---案例2--职员管理功能

    [一]准备工作 (1)创建菜单,修改跳转路径 <li> <a href="javascript:;" class="workerManage" ...

  9. Java编辑编译及运行环境

    Java编辑编译及运行环境 Microsoft Windows 编辑工具 EditPlus JDK JDK(Java Development Kit,Java开发工具包)安装JDK之后,其中bin文件 ...

  10. 牛客多校Round 4

    Soved:3 rank:133 A.Ternay String 欧拉降幂一下 但是反复求phi会超时 但mod是同一个就可以记忆化一下 #include <bits/stdc++.h> ...