重庆市中考满分作文-名言给了我力量

时间:2024.4.20

名言给了我力量

你喜欢读书吗?你知道书中描绘的纯洁美好的世界吗?你体会过遨游在知识的海洋中那无穷的乐趣吗?朋友,读书吧!你会受益终生的。

我很小就开始读书了,先是父母要求我读,后来我被书中的世界迷住了,慢慢地喜欢上了读书。读了书中的至理名言后,我掌握了不少知识,懂得了不少做人的道理。

你先看看我书桌玻璃板下的名言吧:“逝者如斯夫,不舍昼夜。”这是《论语》中的一句话,它告诉我,时间不停地流逝,一去不复返,必须珍惜时间,珍惜时间就是珍惜今天,珍惜现在;“明日复明日,明日何其多,我生待明日,万事皆蹉跎。”要紧紧抓住现在,不让光阴虚度。

我知道了时间的宝贵,就身体力行,做事不拖拉不松懈。我国清代文学家蒲松龄,多次科考都名落孙山,后来专心创作,为了激励自己,他在铜镇尺上刻了一副对联:“有志者事竟成破釜沉舟百二秦关终归楚;苦心人天不负卧薪尝胆三千越甲可吞吴。”蒲松龄正是用项羽破釜沉舟大破秦兵,和勾践卧薪尝

胆终于灭掉越国的历史故事来激励自己埋头写书的。由于他从不懈怠,终于创作出传世佳作《聊斋志异》。蒲松龄的故事,给我很大启发,立下志愿,要努力奋斗,争取成功。人们做事情,开始时热情高涨,劲头十足,但往往是虎头蛇尾,不能坚持到底,圆满结束。“靡不有初,鲜克有终”说的就是这个道理。这句名言时时鞭策我,做事不要惧怕困难,要坚持到底。 书籍给我力量,教我如何做事,教我如何做人。李白“天生我才必有用”的诗句,使我明白了:人要有所作为,人能有所作为;孙膑修兵法、司马迁写《史记》的故事告诉我,做人要自尊自爱,力争上游,不甘落后。这样才能化腐朽为神奇,变耻辱为光荣;齐桓公重用曾经是自己对手的管仲,告诉我对人要宽容大度,更需要的是理解与信任;东汉太学范式不远千里探望朋友,它告诉我 “言必信行必果。”

名人给我力量,名言伴我成长,人类积累起来的一切经验与智慧,在知识的彼岸在等待着我们,等待我们去采撷去吸收。而到达彼岸的航船就是读书。开卷有益,让这些名人名言作为我们心中的灯塔,为生命之舟导航,让我们在生活的波涛中不畏困难,劈波斩浪,驶向理想的彼岸。


第二篇:重庆市中考满分作文-满分作文


Stream的主要环节分为捕获(capture),分发(propagation)和应用(apply)。如果从应用这些环节所处的地方,可以分为:

UpStreams(capture和propagation在source数据库,apply在destination数据库)。 DownStream(capture和propagation,以及apply在destination数据库)

如果成对象来分,可以分成:

database级的stream

owner级的stream

table级的stream

下面我们来建立几个stream:

(一)owner级UpStream:

1. 在source和destination机(注以下操作需要在2个机器上进行):

1.1 创建stream用户的表空间:

create tablespace tbs_stream datafile

'/oracle/app/oracle/oradata/stream02/tbs_stream02.dbf' size 200M;

1.2 将logmnr的默认表空间转到刚刚建立的表空间:

SQL> execute dbms_logmnr_d.set_tablespace('tbs_stream');

PL/SQL procedure successfully completed.

SQL>

1.3 创建stream user和授权:

SQL> CREATE USER strmadmin IDENTIFIED BY strmadmin

2 DEFAULT TABLESPACE tbs_stream

3 QUOTA UNLIMITED ON tbs_stream;

SQL> grant dba to strmadmin;

Grant succeeded.

SQL>

SQL>

SQL> BEGIN

2 DBMS_STREAMS_AUTH.GRANT_ADMIN_PRIVILEGE(

3 grantee => 'strmadmin',

4 grant_privileges => true);

END;

/ 5 6

PL/SQL procedure successfully completed.

SQL>

1.4 check stream admin用户的情况:

SQL> SELECT * FROM dba_streams_administrator;

USERNAME LOCAL_ ACCESS

------------------------------------------------------------ ------ ------ STRMADMIN YES YES

SQL>

1.6 查一下arch目录是否设置正确,是否启动归档模式。

1.7 设置tnsname,能tnsping到对方的机器。

1.8 设置global_names

SQL> Alter system set global_names=TRUE scope=BOTH;

System altered.

SQL>

1.9 设置stream需要的初始化参数:

alter system set aq_tm_processes=2 scope=both;

alter system set global_names=true scope=both;

alter system set job_queue_processes=10 scope=both;

alter system set parallel_max_servers=20 scope=both;

alter system set undo_retention=3600 scope=both;

alter system set nls_date_format='YYYY-MM-DD HH24:MI:SS' scope=spfile; alter system set streams_pool_size=25M scope=spfile;

alter system set utl_file_dir='*' scope=spfile;

alter system set open_links=4 scope=spfile;

1.10 建立dblink。

在source机:

create database link stream02 connect to strmadmin identified by strmadmin using 'stream02';

在destination机:

create database link stream01 connect to strmadmin identified by strmadmin using 'stream01';

2. 在source数据库启用Database 追加日志

alter database add supplemental log data;

3.在source数据库创建stream队列:

connect strmadmin/strmadmin

SQL> exec dbms_streams_adm.set_up_queue;

PL/SQL procedure successfully completed.

注意如果没有指定queue_table和queue_name,数据库是默认给queue_name为

STREAMS_QUEUE_TABLE ,queue_name为STREAMS_QUEUE:

SQL> select owner,queue_table,name from dba_queues where owner='STRMADMIN';

OWNER QUEUE_TABLE NAME

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

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

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

STRMADMIN STREAMS_QUEUE_TABLE STREAMS_QUEUE

STRMADMIN STREAMS_QUEUE_TABLE AQ$_STREAMS_QUEUE_TABLE_E

SQL>

4. 在destination数据库创建stream队列:

connect strmadmin/strmadmin

begin

dbms_streams_adm.set_up_queue(

queue_table => 'dest_queue_table',

queue_name => 'dest_queue');

end;

/

SQL> select owner,queue_table,name from dba_queues where owner='STRMADMIN';

OWNER QUEUE_TABLE NAME

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

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

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

STRMADMIN DEST_QUEUE_TABLE DEST_QUEUE

STRMADMIN DEST_QUEUE_TABLE AQ$_DEST_QUEUE_TABLE_E

SQL>

5. 在source数据库创建capture进程:

connect strmadmin/strmadmin

begin

dbms_streams_adm.add_schema_rules(

schema_name => 'hr',

streams_type => 'capture',

streams_name => 'capture_stream01_to_stream02',

queue_name => 'strmadmin.STREAMS_QUEUE',

include_dml => true,

include_ddl => true,

include_tagged_lcr => false,

source_database => null,

inclusion_rule => true);

end;

/

此时可以在source数据库看到有c001这样的进程.

6.初始化需要做stream的schema:

6.1 在source数据库导出:

exp userid=hr/hr file='/oracle/hr.dmp' object_consistent=y rows=y

6.2 在destination数据库导入

imp userid=system/oracle@stream02 file='/oracle/hr.dmp' ignore=y commit=y log='/oracle/hr.log' streams_instantiation=y fromuser=hr touser=hr

7.在source数据库创建schema级分发规则:

begin

dbms_streams_adm.add_schema_propagation_rules(

schema_name => 'hr',

streams_name => 'propag_strm01_to_strm02',

source_queue_name => 'strmadmin.STREAMS_QUEUE',

destination_queue_name => 'strmadmin.dest_queue@stream02',

include_dml => true,

include_ddl => true,

include_tagged_lcr => false,

source_database => 'stream01',

inclusion_rule => true);

end;

/

注意此时job queue进程开始工作(j00x)

8. 在source数据库设置分发作业计划,latency => 0表示实时分发。 begin

dbms_aqadm.alter_propagation_schedule(

queue_name => 'STREAMS_QUEUE',

destination => 'stream02',

latency => 0);

end;

/

9. 在destination数据库创建apply进程:

begin

dbms_streams_adm.add_schema_rules(

schema_name => 'hr',

streams_type => 'apply',

streams_name => 'apply_strm01_to_strm02',

queue_name => 'strmadmin.dest_queue',

include_dml => true,

include_ddl => true,

include_tagged_lcr => false,

source_database => 'stream01',

inclusion_rule => true);

end;

/

注意此时有a001进程出现。

10. 最后启动stream:

10.1 在destination数据库启动apply:

begin

dbms_apply_adm.start_apply(

apply_name => 'apply_strm01_to_strm02'); end;

/

10.2 在source数据库启动capture:

begin

dbms_capture_adm.start_capture(

capture_name => 'capture_stream01_to_stream02'); end;

/

11. 停止stream:

11.1 在source数据库停止capture:

begin

dbms_capture_adm.stop_capture(

capture_name => 'capture_stream01_to_stream02'); end;

/

11.2 在destination数据库停止apply:

begin

dbms_apply_adm.stop_apply(

apply_name => 'apply_strm01_to_strm02');

end;

/ (二) owner级downstream:

1.1~1.10 同upstream。

2. 在downstream site设置:

ALTER SYSTEM SET LOG_ARCHIVE_DEST_STATE_2=ENABLE SCOPE=SPFILE;

ALTER SYSTEM SET

LOG_ARCHIVE_DEST_2='LOCATION=/oracle/app/oracle/arch/standby_arch VALID_FOR=(STANDBY_LOGFILE,PRIMARY_ROLE)' SCOPE=SPFILE;

3. 在source site和downstream site同时设置:

ALTER SYSTEM SET LOG_ARCHIVE_CONFIG='DG_CONFIG=(stream01,stream02)' SCOPE=SPFILE;

4. 从soruce site创建standby redo:

4.1 在source库查询redo情况:

SQL> select THREAD#, GROUP#, BYTES/1024/1024 from V$LOG;

THREAD# GROUP# BYTES/1024/1024

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

1 1 50

1 2 50

1 3 50

SQL> 注意创建standby redo时,大小要和source site的redo大小一致,数量上要比source site的redo多一个。

4.2 在downstream site:

ALTER DATABASE ADD STANDBY LOGFILE GROUP 4

('/oracle/app/oracle/oradata/stream02/stdy_redo04.log') SIZE 50M;

ALTER DATABASE ADD STANDBY LOGFILE GROUP 5

('/oracle/app/oracle/oradata/stream02/stdy_redo05.log') SIZE 50M;

ALTER DATABASE ADD STANDBY LOGFILE GROUP 6

('/oracle/app/oracle/oradata/stream02/stdy_redo06.log') SIZE 50M;

ALTER DATABASE ADD STANDBY LOGFILE GROUP 7

('/oracle/app/oracle/oradata/stream02/stdy_redo04.log') SIZE 50M;

4.3 在downstream site上检查一下是否建立成功:

SQL> SELECT GROUP#, THREAD#, SEQUENCE#, ARCHIVED, STATUS FROM V$STANDBY_LOG;

GROUP# THREAD# SEQUENCE# ARCHIV STATUS

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

4 0 0 YES UNASSIGNED

5 0 0 YES UNASSIGNED

6 0 0 YES UNASSIGNED

7 0 0 YES UNASSIGNED

SQL>

5. 准备source site的参数:

ALTER SYSTEM SET LOG_ARCHIVE_DEST_STATE_2=ENABLE SCOPE=SPFILE;

ALTER SYSTEM SET LOG_ARCHIVE_DEST_2='SERVICE=stream02 LGWR SYNC NOREGISTER VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE)

DB_UNIQUE_NAME=stream02'

SCOPE=SPFILE;

6. 在source site和downstream site同时设置参数:

ALTER SYSTEM SET LOG_ARCHIVE_CONFIG='DG_CONFIG=(stream01,stream02)' SCOPE=SPFILE; 7. 开始stream配置:

7.1 在source site创建需要复制的schema:

SQL> create user hjm identified by hjm default tablespace users;

User created.

SQL> grant connect, resource, create table to hjm;

Grant succeeded.

SQL>

7.2 在downstream site设置stream queue:

conn strmadmin/strmadmin

BEGIN

DBMS_STREAMS_ADM.SET_UP_QUEUE(

queue_table => 'strmadmin.DOWNSTREAM_Q_TABLE',

queue_name => 'strmadmin.DOWNSTREAM_Q',

queue_user => 'STRMADMIN');

END;

/

1* select name, queue_table,QUEUE_TYPE,USER_COMMENT from user_queues SQL> /

NAME QUEUE_TABLE QUEUE_TYPE USER_COMMENT

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

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

AQ$_DOWNSTREAM_Q_TABLE_E DOWNSTREAM_Q_TABLE EXCEPTION_QUEUE exception queue

DOWNSTREAM_Q DOWNSTREAM_Q_TABLE NORMAL_QUEUE 注意,从最佳实践出发,建议downstream设置一个queue,而不是多个queue。这一个queue将用于catpure和apply的queue,能避免分发和queue to queue传输的冗余。

7.3 在downstream site创建apply进程:

conn strmadmin/strmadmin

BEGIN

DBMS_APPLY_ADM.CREATE_APPLY(

queue_name => 'strmadmin.DOWNSTREAM_Q',

apply_name => 'DOWNSTREAM_APPLY',

apply_captured => TRUE

);

END;

/

7.4 检查 apply的信息:

SQL> SELECT apply_name, status, queue_name FROM DBA_APPLY where

APPLY_NAME='DOWNSTREAM_APPLY';

APPLY_NAME STATUS QUEUE_NAME

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

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

DOWNSTREAM_APPLY DISABLED DOWNSTREAM_Q

SQL>

SQL> l

1 SELECT parameter, value, set_by_user

2 FROM DBA_APPLY_PARAMETERS

3* WHERE apply_name = 'DOWNSTREAM_APPLY'

SQL> /

PARAMETER VALUE SET_BY

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

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

ALLOW_DUPLICATE_ROWS N NO

COMMIT_SERIALIZATION FULL NO

DISABLE_ON_ERROR Y NO

DISABLE_ON_LIMIT N NO

MAXIMUM_SCN INFINITE NO

PARALLELISM 1 NO

STARTUP_SECONDS 0 NO

TIME_LIMIT INFINITE NO

TRACE_LEVEL 0 NO

TRANSACTION_LIMIT INFINITE NO

TXN_LCR_SPILL_THRESHOLD 10000 NO

WRITE_ALERT_LOG Y NO

12 rows selected.

SQL>

7.5 在downstream site创建capture进程:

conn strmadmin/strmadmin

BEGIN

DBMS_CAPTURE_ADM.CREATE_CAPTURE(

queue_name => 'strmadmin.DOWNSTREAM_Q',

capture_name => 'DOWNSTREAM_CAPTURE',

rule_set_name => NULL,

start_scn => NULL,

source_database => 'stream01',

use_database_link => true,

first_scn => NULL,

logfile_assignment => 'implicit');

END;

/

7.6 检查capture的信息:

SQL> SELECT capture_name, status from dba_capture;

CAPTURE_NAME STATUS

------------------------------------------------------------ ---------------- DOWNSTREAM_CAPTURE DISABLED

SQL>

SQL> SELECT parameter, value, set_by_user FROM DBA_CAPTURE_PARAMETERS;

PARAMETER VALUE SET_BY

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

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

DISABLE_ON_LIMIT N NO

DOWNSTREAM_REAL_TIME_MINE N NO

MAXIMUM_SCN INFINITE NO

MESSAGE_LIMIT INFINITE NO

PARALLELISM 1 NO

STARTUP_SECONDS 0 NO

TIME_LIMIT INFINITE NO

TRACE_LEVEL 0 NO

WRITE_ALERT_LOG Y NO

9 rows selected.

SQL> 8. 为实时变动设置capture:

8.1 在downstream site:

conn strmadmin/strmadmin

SQL> BEGIN

2 DBMS_CAPTURE_ADM.SET_PARAMETER(

3 capture_name => 'DOWNSTREAM_CAPTURE',

4 parameter => 'downstream_real_time_mine', 5 value => 'y');

6 END;

7 /

PL/SQL procedure successfully completed.

SQL>

8.2 在downstream site设置rule规则:

SQL> BEGIN

2 DBMS_STREAMS_ADM.ADD_SCHEMA_RULES( 3 schema_name => 'hjm',

4 streams_type => 'capture',

5 streams_name => 'downstream_capture', 6 queue_name => 'strmadmin.downstream_q', 7 include_dml => true,

8 include_ddl => true,

9 include_tagged_lcr => false,

10 source_database => 'stream01',

11 inclusion_rule => TRUE);

12 END;

13 /

PL/SQL procedure successfully completed.

SQL>

8.3 在downstream site检查rule设置情况:

SQL> l

1 SELECT rule_name, rule_condition

2 FROM DBA_STREAMS_SCHEMA_RULES

3 WHERE streams_name = 'DOWNSTREAM_CAPTURE'

4* AND streams_type = 'CAPTURE'

SQL> /

RULE_NAME RULE_CONDITION ------------------------------------------------------------

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

HJM15 ((:dml.get_object_owner() = 'HJM') and :dml.is_null_tag() =

'Y'

and :dml.get_source_database_name() = 'STREAM01.REGRESS.

RDBMS.DEV.US.ORACLE.COM' )

HJM16 ((:ddl.get_object_ow

ner() = 'HJM' or :ddl.get_base_table_own

er() = 'HJM') and :ddl.is_null_tag() = 'Y' and :ddl.get_sour

ce_database_name() = 'STREAM01.REGRESS.RDBMS.DEV.US.ORACLE.C

OM' )

SQL> 9. 实例化需要同步的owner:

9.1 在source site:

exp system/oracle owner=hjm file=hjm.dump log=hjm.log object_consistent=Y

9.2 在downstream site:

SQL> create user hjm identified by hjm default tablespace users;

User created.

SQL> grant connect, resource, create table to hjm;

Grant succeeded.

SQL>

9.3 在source site:

imp system/oracle@stream02 file=hjm.dump full=y ignore=y

STREAMS_INSTANTIATION=Y

10. 在downstream site开始启动apply进程:

conn strmadmin/strmadmin

SQL> exec DBMS_APPLY_ADM.START_APPLY(apply_name => 'DOWNSTREAM_APPLY');

PL/SQL procedure successfully completed.

10.1 检查 apply情况:

SQL> select apply_name, status from dba_apply where

APPLY_NAME='DOWNSTREAM_APPLY';

APPLY_NAME STATUS

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

DOWNSTREAM_APPLY ENABLED

SQL> 可以看到已经从disbale变成enabled。

11. 在downstream site启动capture进程:

conn strmadmin/strmadmin

SQL> exec DBMS_CAPTURE_ADM.START_CAPTURE(capture_name => 'DOWNSTREAM_CAPTURE');

PL/SQL procedure successfully completed.

SQL>

11.1 检查 capture情况:

SQL> select capture_name, status from dba_capture;

CAPTURE_NAME STATUS

------------------------------------------------------------ ---------------- DOWNSTREAM_CAPTURE ENABLED

SQL> 看到capture的status也从disable变成enabled了。

至此,downstream建立完毕。

【trouble shooting】:

1.对于upstream,需要检查dba_capture, dba_propagation, dba_apply:

--在source数据库:

SQL> l

1 select propagation_name as name,status,ERROR_MESSAGE from dba_propagation 2 union all

3* select CAPTURE_NAME,status,ERROR_MESSAGE from dba_capture

SQL> /

NAME STATUS ERRO

R_MESSAGE

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

PROPAG_STRM01_TO_STRM02 ENABLED

CAPTURE_STREAM01_TO_STREAM02 ENABLED

SQL>

--在destination数据库:

1* SELECT apply_name,status,error_message from dba_apply

SQL> /

APPLY_NAME STATUS ERROR_MESSAGE

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

APPLY_STRM01_TO_STRM02 ENABLED 以上均为enable说明各个进程正常;

如果为disable,需要用

dbms_capture_adm.start_capture/DBMS_PROPAGATION_ADM.start_propagation/dbms_apply_adm.start_apply包来进行启动;

如果是abort,说明是异常终止,需要查对应的error message,排除错误后启动。

案例一:

upstream的apply进程和capture进程都正常,但是无法同步,查dba_propagation,发现异常: SQL> l

1* select propagation_name,status,ERROR_MESSAGE from dba_propagation

SQL>

PROPAGATION_NAME STATUS ERROR_MESSAGE

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

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

PROPAG_STRM01_TO_STRM02 DISABLED ORA-12541: TNS:no listener

ORA-12541: TNS:no listener

进一步查alertlog中发现:

Sun Jul 17 06:01:02 2011

Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) encountered following error: ORA-12541: TNS:no listener

ORA-12541: TNS:no listener

Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) disabled due to 16 consecutive errors. Sun Jul 17 06:01:46 2011

Error 12541 received logging on to the standby

Check whether the listener is up and running.

Sun Jul 17 06:01:46 2011

Errors in file /oracle/app/oracle/admin/stream01/bdump/stream01_arc1_21844.trc: ORA-12541: TNS:no listener

PING[ARC1]: Heartbeat failed to connect to standby 'stream02'. Error is 12541. Sun Jul 17 06:06:46 2011

确实看到了问题存在。我们进一步看:

[oracle@stream1 bdump]$ cat alert*.log |grep Propagation

Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) encountered following error: Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) encountered following error: Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) encountered following error: Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) encountered following error: Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) encountered following error: Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) encountered following error: Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) encountered following error: Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) encountered following error: Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) encountered following error: Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) encountered following error: Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) encountered following error: Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) encountered following error: Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) encountered following error: Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) encountered following error: Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) encountered following error: Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) encountered following error: Propagation Schedule for (STRMADMIN.STREAMS_QUEUE,

STREAM02.REGRESS.RDBMS.DEV.US.ORACLE.COM) disabled due to 16 consecutive errors.

[oracle@stream1 bdump]$ 我们看到,propagation进程如果尝试连接,发现没有侦听,尝试16次之后,会自动disable propagation进程。

因此我们要做的就是启动侦听,再启动propagation进程。

SQL> BEGIN

2 DBMS_PROPAGATION_ADM.START_PROPAGATION(

3 propagation_name => 'propag_strm01_to_strm02');

4 END;

5 /

PL/SQL procedure successfully completed.

SQL> select propagation_name,,status,ERROR_MESSAGE from dba_propagation;

PROPAGATION_NAME STATUS ERROR_MESSAGE

--------------------------- ---------------- ----------------------------- PROPAG_STRM01_TO_STRM02 ENABLED

SQL>

2. 对于downstream,由于没有propagation进程,我们可以直接看apply和capture进程的情况: SQL> select propagation_name as name,status,ERROR_MESSAGE from dba_propagation 2 union all

3 select CAPTURE_NAME,status,ERROR_MESSAGE from dba_capture

4 union all

5 SELECT apply_name,status,error_message from dba_apply

6 /

NAME STATUS ERROR_MESSAGE

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

DOWNSTREAM_CAPTURE ENABLED

DOWNSTREAM_APPLY ABORTED ORA-26714: User error encountered while

applying

SQL>

在这个案例中,我们看到apply进程出现了问题,问题是ora-26174。进一步:

[oracle@stream2 ~]$ oerr ora 26714

26714, 00000, "User error encountered while applying"

// *Cause: An error was encountered while applying.

// *Action: Query the dba_apply_error view to determine the error and // take the appropriate action.

[oracle@stream2 ~]$

好,我们进一步来看dba_apply_error:

SQL> l

1* select

APPLY_NAME,LOCAL_TRANSACTION_ID,SOURCE_COMMIT_SCN,MESSAGE_NUMBER,ERROR_MESSAGE from dba_apply_error

SQL> /

APPLY_NAME LOCAL_TRAN SOURCE_COMMIT_SCN MESSAGE_NUMBER ERROR_MESSAGE -------------------- ---------- ----------------- --------------

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

DOWNSTREAM_APPLY 9.44.280 695025 2 ORA-26687: no instantiation SCN provided for ""."" in source

database

"STREAM01.REGRESS.RDBMS.DEV.US.ORACLE.COM"

SQL> 我们看到是downstream site库的是实例化没有成功,我们重新在source库做一次实例化,相关的包可以参见这里:

SQL> DECLARE

2 iscn NUMBER;

3 BEGIN

4 iscn := DBMS_FLASHBACK.GET_SYSTEM_CHANGE_NUMBER();

5 DBMS_APPLY_ADM.SET_SCHEMA_INSTANTIATION_SCN(

6 source_schema_name => 'hjm',

7 source_database_name => 'stream02',

8 instantiation_scn => iscn,

9 recursive => true);

10 END;

11 /

PL/SQL procedure successfully completed.

SQL>

然后重启apply进程:

SQL> exec dbms_apply_adm.stop_apply(apply_name => 'DOWNSTREAM_APPLY');

PL/SQL procedure successfully completed.

SQL> exec dbms_apply_adm.start_apply(apply_name => 'DOWNSTREAM_APPLY');

PL/SQL procedure successfully completed.

检查进程情况,已经恢复正常:

SQL> select propagation_name as name,status,ERROR_MESSAGE from

dba_propagation

2 union all 3 select CAPTURE_NAME,status,ERROR_MESSAGE from

dba_capture

4 union all SELECT apply_name,status,error_message from dba_apply 5 6

SQL> /

NAME STATUS ERROR_MESSAGE

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

DOWNSTREAM_CAPTURE ENABLED

DOWNSTREAM_APPLY ENABLED

SQL>

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