DDL Setup Steps

SQL> grant execute on utl_file to ggs;

Grant succeeded.

Create GLOBALS file

[oracle@zwc ~]$ cd /ggs/

[oracle@zwc ggs]$ cat GLOBALS 

GGSCHEMA GGS

run marker_setup.sql

[oracle@zwc ggs]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.4.0 – Production on Fri Jun 6 18:56:32 2014

Copyright (c) 1982, 2007, Oracle.  All Rights Reserved.

Connected to:

Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 – 64bit Production

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

SQL> @marker_setup.sql

Marker setup script

You will be prompted for the name of a schema for the Oracle GoldenGate database objects.

NOTE: The schema must be created prior to running this script.

NOTE: Stop all DDL replication before starting this installation.

Enter Oracle GoldenGate schema name:ggs

Marker setup table script complete, running verification script…

Please enter the name of a schema for the GoldenGate database objects:

Setting schema name to GGS

MARKER TABLE

——————————-

OK

MARKER SEQUENCE

——————————-

OK

Script complete.

run ddl_setup.sql

SQL> alter system set recyclebin=off;

System altered.

SQL> create tablespace ggs datafile '/u01/app/oracle/oradata/zwc/ggs01.dbf' size 100M autoextend on;

Tablespace created.

SQL> 

SQL> alter user ggs default tablespace ggs;

User altered.

SQL> @ddl_setup.sql

Oracle GoldenGate DDL Replication setup script

Verifying that current user has privileges to install DDL Replication…

You will be prompted for the name of a schema for the Oracle GoldenGate database objects.

NOTE: For an Oracle 10g source, the system recycle bin must be disabled. For Oracle 11g and later, it can be enabled.

NOTE: The schema must be created prior to running this script.

NOTE: Stop all DDL replication before starting this installation.

Enter Oracle GoldenGate schema name:ggs

Working, please wait …

Spooling to file ddl_setup_spool.txt

Checking for sessions that are holding locks on Oracle Golden Gate metadata tables …

Check complete.

Using GGS as a Oracle GoldenGate schema name.

Working, please wait …

DDL replication setup script complete, running verification script…

Please enter the name of a schema for the GoldenGate database objects:

Setting schema name to GGS

CLEAR_TRACE STATUS:

Line/pos             Error

——————– —————————————————————–

No errors            No errors

CREATE_TRACE STATUS:

Line/pos             Error

——————– —————————————————————–

No errors            No errors

TRACE_PUT_LINE STATUS:

Line/pos             Error

——————– —————————————————————–

No errors            No errors

INITIAL_SETUP STATUS:

Line/pos             Error

——————– —————————————————————–

No errors            No errors

DDLVERSIONSPECIFIC PACKAGE STATUS:

Line/pos             Error

——————– —————————————————————–

No errors            No errors

DDLREPLICATION PACKAGE STATUS:

Line/pos             Error

——————– —————————————————————–

No errors            No errors

DDLREPLICATION PACKAGE BODY STATUS:

Line/pos             Error

——————– —————————————————————–

No errors            No errors

DDL IGNORE TABLE

———————————–

OK

DDL IGNORE LOG TABLE

———————————–

OK

DDLAUX  PACKAGE STATUS:

Line/pos             Error

——————– —————————————————————–

No errors            No errors

DDLAUX PACKAGE BODY STATUS:

Line/pos             Error

——————– —————————————————————–

No errors            No errors

SYS.DDLCTXINFO  PACKAGE STATUS:

Line/pos             Error

——————– —————————————————————–

No errors            No errors

SYS.DDLCTXINFO  PACKAGE BODY STATUS:

Line/pos             Error

——————– —————————————————————–

No errors            No errors

DDL HISTORY TABLE

———————————–

OK

DDL HISTORY TABLE(1)

———————————–

OK

DDL DUMP TABLES

———————————–

OK

DDL DUMP COLUMNS

———————————–

OK

DDL DUMP LOG GROUPS

———————————–

OK

DDL DUMP PARTITIONS

———————————–

OK

DDL DUMP PRIMARY KEYS

———————————–

OK

DDL SEQUENCE

———————————–

OK

GGS_TEMP_COLS

———————————–

OK

GGS_TEMP_UK

———————————–

OK

DDL TRIGGER CODE STATUS:

Line/pos             Error

——————– —————————————————————–

No errors            No errors

DDL TRIGGER INSTALL STATUS

———————————–

OK

DDL TRIGGER RUNNING STATUS

———————————————————————-

ENABLED

STAYMETADATA IN TRIGGER

———————————————————————-

OFF

DDL TRIGGER SQL TRACING

———————————————————————-

0

DDL TRIGGER TRACE LEVEL

———————————————————————-

0

LOCATION OF DDL TRACE FILE

————————————————————————————————————————

/u01/app/oracle/admin/zwc/udump/ggs_ddl_trace.log

Analyzing installation status…

STATUS OF DDL REPLICATION

————————————————————————————————————————

SUCCESSFUL installation of DDL Replication software components

Script complete.

run role_setup.sql

SQL> @role_setup.sql

GGS Role setup script

This script will drop and recreate the role GGS_GGSUSER_ROLE

To use a different role name, quit this script and then edit the params.sql script to change the gg_role parameter to the preferred name. (Do not run the script.)

You will be prompted for the name of a schema for the GoldenGate database objects.

NOTE: The schema must be created prior to running this script.

NOTE: Stop all DDL replication before starting this installation.

Enter GoldenGate schema name:ggs

Wrote file role_setup_set.txt

PL/SQL procedure successfully completed.

Role setup script complete

Grant this role to each user assigned to the Extract, GGSCI, and Manager processes, by using the following SQL command:

GRANT GGS_GGSUSER_ROLE TO <loggedUser>

where <loggedUser> is the user assigned to the GoldenGate processes.

SQL> grant ggs_ggsuser_role to ggs;

Grant succeeded.

run ddl_enable.sql

SQL> @ddl_enable.sql

Trigger altered.

Run ddl_pin.sql to improve the performance of DDL trigger.In order to run this,make sure dbms_shared_pool package is installed. If not then install that package first,which can be
installed by running following script.

SQL> @?/rdbms/admin/dbmspool.sql

Package created.

Grant succeeded.

View created.

Package body created.

run ddl_pin.sql with "ggs" as argument

SQL> @ddl_pin.sql ggs

PL/SQL procedure successfully completed.

PL/SQL procedure successfully completed.

PL/SQL procedure successfully completed.

Create Parameter Files & Start Manager

[oracle@zwc ggs]$ ggsci

Oracle GoldenGate Command Interpreter for Oracle

Version 11.2.1.0.6 16211226 OGGCORE_11.2.1.0.6_PLATFORMS_130418.1829_FBO

Linux, x64, 64bit (optimized), Oracle 10g on Apr 18 2013 22:43:23

Copyright (C) 1995, 2013, Oracle and/or its affiliates. All rights reserved.

GGSCI (zwc) 1> view param mgr

PORT 7809

DYNAMICPORTLIST 7850-7860

LAGINFOMINUTES 0

LAGREPORTMINUTES 10

LAGCRITICALMINUTES 60

AUTORESTART EXTRACT E*, RETRIES 10, WAITMINUTES 5, RESETMINUTES 1440

AUTORESTART EXTRACT P*, RETRIES 10, WAITMINUTES 5, RESETMINUTES 1440

PURGEOLDEXTRACTS /ggs/trails/source/*, USECHECKPOINTS, MINKEEPDAYS 10, FREQUENCYMINUTES 15

GGSCI (zwc) 2> start mgr

Manager started.

GGSCI (zwc) 3> info mgr

Manager is running (IP port zwc.7809).

GGSCI (zwc) 4> info all

Program     Status      Group       Lag at Chkpt  Time Since Chkpt

MANAGER     RUNNING

GGSCI (zwc) 5>

Create directory for trail files

mkdir -p /ggs/trails/source

Create parameter file for Extract

GGSCI (zwc) 8> view param e10gdb

EXTRACT E10GDB

SETENV (ORACLE_SID=zwc)

SETENV (ORACLE_HOME=/u01/app/oracle/product/10.2.0/db_1)

SETENV (NLS_LANG="AMERICAN_AMERICA.ZHS16GBK")

USERID ggs, PASSWORD ggs

EXTTRAIL /ggs/trails/source/aa

TRANLOGOPTIONS EXCLUDEUSER GGS

TRANLOGOPTIONS LOGRETENTION DISABLED

WARNLONGTRANS 3H CHECKINTERVAL 30m

REPORTCOUNT EVERY 10 MINUTES, RATE

DISCARDFILE /ggs/dirdef/E10GDB.dec, APPEND

DISCARDROLLOVER ON SUNDAY

GETUPDATEBEFORES

DDL INCLUDE MAPPED

DDLOPTIONS ADDTRANDATA RETRYOP RETRYDELAY 10 MAXRETRIES 10

TABLE HR.*;

TABLE OE.*;

TABLE PM.*;

SEQUENCE HR.*;

SEQUENCE OE.*;

SEQUENCE PM.*;

Create parameter filefile for Pump

GGSCI (zwc) 10> view param p10gdb

EXTRACT P10GDB

SETENV (ORACLE_SID=zwc)

SETENV (ORACLE_HOME=/u01/app/oracle/product/10.2.0/db_1)

SETENV (NLS_LANG="AMERICAN_AMERICA.ZHS16GBK")

PASSTHRU

RMTHOST 192.168.1.61, MGRPORT 7809, &

COMPRESS, TCPBUFSIZE 262144, TCPFLUSHBYTES 262144

RMTTRAIL /ggs/trails/target/aa

STATOPTIONS REPORTFETCH

REPORTCOUNT EVERY 10 MINUTES, RATE

DISCARDFILE /ggs/dirdef/P10GDB.dec, APPEND

DISCARDROLLOVER ON SUNDAY

TABLE HR.*;

TABLE OE.*;

TABLE PM.*;

SEQUENCE HR.*;

SEQUENCE OE.*;

SEQUENCE PM.*;

In 10.2 database,follow there setps to make log_retention enable.

SQL> exec dbms_streams_auth.grant_admin_privilege('GGS');

PL/SQL procedure successfully completed.

SQL> grant insert on system.logmnr_restart_ckpt$ to ggs;

Grant succeeded.

SQL> grant update on sys.streams$_capture_process to ggs;

Grant succeeded.

SQL> grant become user to ggs;

Grant succeeded.

Add following parameter in the extract.In this demo,we are not enabling log retention.

TRANLOGOPTIONS LOGRETENTION SR

Add Extract and Pump

[oracle@zwc diroby]$ cat add_extract.oby 

dblogin userid ggs password ggs

add extract e10gdb, tranlog, begin now

add exttrail /ggs/trails/source/aa, extract e10gdb, megabytes 100

[oracle@zwc diroby]$ cat add_pump.oby 

add extract p10gdb, exttrailsource /ggs/trails/source/aa, extseqno 0, extrba 0

add rmttrail /ggs/trails/target/aa, extract p10gdb, megabytes 100

[oracle@zwc ggs]$ ggsci

Oracle GoldenGate Command Interpreter for Oracle

Version 11.2.1.0.6 16211226 OGGCORE_11.2.1.0.6_PLATFORMS_130418.1829_FBO

Linux, x64, 64bit (optimized), Oracle 10g on Apr 18 2013 22:43:23

Copyright (C) 1995, 2013, Oracle and/or its affiliates. All rights reserved.

GGSCI (zwc) 1> info all

Program     Status      Group       Lag at Chkpt  Time Since Chkpt

MANAGER     RUNNING

GGSCI (zwc) 2> obey ./diroby/add_extract.oby

GGSCI (zwc) 3> dblogin userid ggs password ggs

Successfully logged into database.

GGSCI (zwc) 4> add extract e10gdb, tranlog, begin now

EXTRACT added.

GGSCI (zwc) 5> add exttrail /ggs/trails/source/aa, extract e10gdb, megabytes 100

EXTTRAIL added.

GGSCI (zwc) 6> obey ./diroby/add_pump.oby

GGSCI (zwc) 7> add extract p10gdb, exttrailsource /ggs/trails/source/aa, extseqno 0, extrba 0

EXTRACT added.

GGSCI (zwc) 8> add rmttrail /ggs/trails/target/aa, extract p10gdb, megabytes 100

RMTTRAIL added.

GGSCI (zwc) 9> info all

Program     Status      Group       Lag at Chkpt  Time Since Chkpt

MANAGER     RUNNING                                           

EXTRACT     STOPPED     E10GDB      00:00:00      00:00:14    

EXTRACT     STOPPED     P10GDB      00:00:00      00:00:03

Start only the extract at this point and not the pump

GGSCI (zwc) 2> start e10gdb

Sending START request to MANAGER …

EXTRACT E10GDB starting

GGSCI (zwc) 3> info all

Program     Status      Group       Lag at Chkpt  Time Since Chkpt

MANAGER     RUNNING                                           

EXTRACT     STOPPED     E10GDB      00:00:00      00:04:12    

EXTRACT     STOPPED     P10GDB      00:00:00      00:04:02

GGSCI (zwc) 4> info all

Program     Status      Group       Lag at Chkpt  Time Since Chkpt

MANAGER     RUNNING                                           

EXTRACT     RUNNING     E10GDB      00:04:13      00:00:02    

EXTRACT     STOPPED     P10GDB      00:00:00      00:04:05

Setup Sequence Replication

Oracle GoldenGate supports Oracle Sequences replication.There are some limitations with sequence replication.

1.sequence replication in bi-directional is not supported

2.cache size,increment interval,and cycle/no-cycle settings must be identical on source and target databases

SQL> @sequence.sql

Please enter the name of a schema for the GoldenGate database objects:

ggs

Setting schema name to GGS

UPDATE_SEQUENCE STATUS:

Line/pos

——————–

Error

—————————————————————–

No errors

No errors

GETSEQFLUSH

Line/pos

——————–

Error

—————————————————————–

No errors

No errors

SEQTRACE

Line/pos

——————–

Error

—————————————————————–

No errors

No errors

REPLICATE_SEQUENCE STATUS:

Line/pos

——————–

Error

—————————————————————–

No errors

No errors

STATUS OF SEQUENCE SUPPORT

————————————————————–

SUCCESSFUL installation of Oracle Sequence Replication support

SQL> grant execute on ggs.updateSequence to ggs;

Grant succeeded.

SQL> grant execute on ggs.replicateSequence to ggs;

Grant succeeded.

SQL> alter table sys.seq$ add supplemental log data (primary key) columns;

Table altered.

Restart extract,flush sequence

[oracle@zwc diroby]$ cat flush_seq.oby 

flush sequence hr.*

flush sequence oe.*

flush sequence pm.*

[oracle@zwc ggs]$ ggsci

Oracle GoldenGate Command Interpreter for Oracle

Version 11.2.1.0.6 16211226 OGGCORE_11.2.1.0.6_PLATFORMS_130418.1829_FBO

Linux, x64, 64bit (optimized), Oracle 10g on Apr 18 2013 22:43:23

Copyright (C) 1995, 2013, Oracle and/or its affiliates. All rights reserved.

GGSCI (zwc) 1> stop extract e10gdb

Sending STOP request to EXTRACT E10GDB …

Request processed.

GGSCI (zwc) 2> info all

Program     Status      Group       Lag at Chkpt  Time Since Chkpt

MANAGER     RUNNING                                           

EXTRACT     STOPPED     E10GDB      00:00:00      00:00:01    

EXTRACT     STOPPED     P10GDB      00:00:00      00:22:40

GGSCI (zwc) 3> start extract e10gdb

Sending START request to MANAGER …

EXTRACT E10GDB starting

GGSCI (zwc) 4> info all

Program     Status      Group       Lag at Chkpt  Time Since Chkpt

MANAGER     RUNNING                                           

EXTRACT     RUNNING     E10GDB      00:00:00      00:00:09    

EXTRACT     STOPPED     P10GDB      00:00:00      00:22:47

GGSCI (zwc) 5> dblogin userid ggs password ggs

Successfully logged into database.

GGSCI (zwc) 6> obey ./diroby/flush_seq.oby

GGSCI (zwc) 7> flush sequence hr.*

Successfully flushed 3 sequence(s) hr.*

GGSCI (zwc) 8> flush sequence oe.*

Successfully flushed 1 sequence(s) oe.*

GGSCI (zwc) 9> flush sequence pm.*

ERROR: Sequence pm.* does not exist.

Setup Heartbeat Job

In order to start the pump,we need to make target 11g database server ready,by installing Oracle GoldenGate and starting manager.Before we do that lets setup a heartbeat job in cron.

The purpose of heartbeat job is to keep updating ggs_mon.ggs_heartbeat table,those transactions will be extracted by Oracle GoldenGate,causing extract RBA to move,and also keep record
of lag time in ggs_lagtime table on the target side.

[oracle@zwc ~]$ cd /ggs

[oracle@zwc ggs]$ mkdir scripts

[oracle@zwc ggs]$ touch ggs_heartbeat.sh

[oracle@zwc ggs]$ chmod 755 ggs_heartbeat.sh 

[oracle@zwc ggs]$ cat ggs_heartbeat.sh 

#!/bin/sh

#Purpose:  To update heartbeat table for OGG monitoring

cd ${HOME}

source ${HOME}/.bash_profile > /dev/null 2>&1

echo $GG_HOME

cd $GG_HOME

DATETIME=`date`

    echo "Heartbeat for DB ${ORACLE_SID} start at ${DATETIME}…\n"

sqlplus -L -S ggs_mon/ggs_mon << EOF 2>&1

update ggs_heartbeat set ts = sysdate;

commit;

exit

EOF

Setup cron for this to run every minute

* * * * * /ggs/ggs_heartbeat.sh > /tmp/ggshb.log 2>&1

In extract e10gdb parameter file,add  following two lines,and restart extract

GGSCI (zwc) 15> view param e10gdb

EXTRACT E10GDB

SETENV (ORACLE_SID=zwc)

SETENV (ORACLE_HOME=/u01/app/oracle/product/10.2.0/db_1)

SETENV (NLS_LANG="AMERICAN_AMERICA.ZHS16GBK")

USERID ggs, PASSWORD ggs

EXTTRAIL /ggs/trails/source/aa

TRANLOGOPTIONS EXCLUDEUSER GGS

TRANLOGOPTIONS LOGRETENTION DISABLED

WARNLONGTRANS 3H CHECKINTERVAL 30m

REPORTCOUNT EVERY 10 MINUTES, RATE

DISCARDFILE /ggs/dirdef/E10GDB.dec, APPEND

DISCARDROLLOVER ON SUNDAY

GETUPDATEBEFORES

DDL INCLUDE MAPPED

DDLOPTIONS ADDTRANDATA RETRYOP RETRYDELAY 10 MAXRETRIES 10

TABLE HR.*;

TABLE OE.*;

TABLE PM.*;

SEQUENCE HR.*;

SEQUENCE OE.*;

SEQUENCE PM.*;

TABLE GGS_MON.ggs_heartbeat ,

   Tokens (host = @GETENV ("GGENVIRONMENT", "HOSTNAME") );

In pump p10gdb parameter file,add following line.After editing the pump parameter file,if pump is running then stop and restart.

GGSCI (zwc) 18> view param p10gdb

EXTRACT P10GDB

SETENV (ORACLE_SID=zwc)

SETENV (ORACLE_HOME=/u01/app/oracle/product/10.2.0/db_1)

SETENV (NLS_LANG="AMERICAN_AMERICA.ZHS16GBK")

PASSTHRU

RMTHOST 192.168.1.61, MGRPORT 7809, &

COMPRESS, TCPBUFSIZE 262144, TCPFLUSHBYTES 262144

RMTTRAIL /ggs/trails/target/aa

STATOPTIONS REPORTFETCH

REPORTCOUNT EVERY 10 MINUTES, RATE

DISCARDFILE /ggs/dirdef/P10GDB.dec, APPEND

DISCARDROLLOVER ON SUNDAY

TABLE HR.*;

TABLE OE.*;

TABLE PM.*;

SEQUENCE HR.*;

SEQUENCE OE.*;

SEQUENCE PM.*;

TABLE GGS_MON.GGS_HEARTBEAT;

Also in replicat we have not created yet,but when we will create replicat parameter file,then we will add following MAP statement in it to make heartbeat work properly.

MAP ggs_mon.ggs_heartbeat, TARGET ggs_mon.ggs_lagtime,

KEYCOLS (ID),

INSERTALLRECORDS,

COLMAP (USEDEFAULTS,

id = 0,

committime = @GETENV ("GGHEADER", "COMMITTIMESTAMP"),

groupname  = @GETENV ("GGENVIRONMENT", "GROUPNAME"),

host       = @TOKEN("host"),

local_insert_time = @DATENOW()

);

Now if we invoke ggsci and run "info" command on extract couple of times after few intervals,we will be able see that its RBA is moving even when there is no application activity
going on in the database.

GGSCI (zwc) 48> info e10gdb

EXTRACT    E10GDB    Last Started 2014-06-06 21:24   Status RUNNING

Checkpoint Lag       00:00:00 (updated 00:00:07 ago)

Log Read Checkpoint  Oracle Redo Logs

                     2014-06-06 21:24:36  Seqno 11, RBA 12435456

                     SCN 0.778809 (778809)

GGSCI (zwc) 49> info e10gdb

EXTRACT    E10GDB    Last Started 2014-06-06 21:24   Status RUNNING

Checkpoint Lag       00:00:00 (updated 00:00:06 ago)

Log Read Checkpoint  Oracle Redo Logs

                     2014-06-06 21:24:54  Seqno 11, RBA 12436992

                     SCN 0.778815 (778815)

版权声明:本文博客原创文章,博客,未经同意,不得转载。

Zero Downtime Upgrade of Oracle 10g to Oracle 11g Using GoldenGate — 3的更多相关文章

  1. Oracle 10g AND Oracle 11g手工建库案例--Oracle 11g

    Oracle 10g AND Oracle 11g手工建库案例--Oracle 11g 系统环境: 操作系统: RedHat EL6 Oracle:  Oracle 10g and Oracle 11 ...

  2. Oracle 10g AND Oracle 11g手工建库案例--Oracle 10g

    Oracle 10g AND Oracle 11g手工建库案例--Oracle 10g 系统环境: 操作系统: RedHat EL6 Oracle:  Oracle 10g and Oracle 11 ...

  3. Zero Downtime Upgrade of Oracle 10g to Oracle 11g Using GoldenGate — 2

    Prepare 10g Database for OGG Create GGS and GGS_MON Database Users SQL> create tablespace ggs_tbs ...

  4. Zero Downtime Upgrade of Oracle 10g to Oracle 11g Using GoldenGate — 4

    Target Side Setup Install OGG on Target Side Creates required directories for OGG [oracle@vzwc1 ggs] ...

  5. Zero Downtime Upgrade of Oracle 10g to Oracle 11g Using GoldenGate — 1

    Source Database DB Name:        zwc Schemas:         HR,OE,PM Version:          10.2.0.4 RAC:       ...

  6. oracle 10g升级到11g

    Linux 上Oracle RAC 10g 升级到 Oracle RAC 11g 了解如何在 Oracle Enterprise Linux 5 上逐步将 Oracle RAC 10g 第 2 版升级 ...

  7. Oracle 10g ORA-01034: ORACLE not available 错误

    今天在开发系统的时候,刚开始还好好的,突然就遇到了一个错误 ORA-01034: ORACLE not available 感到莫名其妙.然后排查问题 监听器ok,各项服务ok. 最后解决办法如下: ...

  8. oracle数据库的迁移(从一台服务器到另一个台服务器,从oracle 10g到oracle 11g)

    这个过程呢,还是蛮艰难的.... 一.最初我使用的是Navicat中的数据传输来迁移的,虽说整个数据库的迁移没有成功,但传输指定的对象时还是传输成功了.所以还是记录一下吧. 1.前提连接好数据库.在指 ...

  9. RHEL6 64位系统安装ORACLE 10g 64bit 数据库

    记得去年4月份的时候,为公司部署测试环境和UAT环境时,在红帽RHEL6 64位系统安装ORACLE 10g 64位数据库时遇到了许多小问题,当时匆匆忙忙也没记录一下这些问题,前几天在虚拟机安装ORA ...

随机推荐

  1. 在iOS7中改动状态栏字体的颜色

    状态栏的字体为黑色:UIStatusBarStyleDefault 状态栏的字体为白色:UIStatusBarStyleLightContent 一.在info.plist中,将View contro ...

  2. M3U8格式解说及实际应用分析

    M3U8有啥优点 ? 网上搜索了一下,大家众说纷纭,个人理解主要是能够做多码率的适配,依据网络带宽,client会选择一个适合自己码率的文件进行播放,保证视频流的流畅. 在IOS device和mac ...

  3. DLNA它 Error, can&#39;t findlibavformat ! 解

    DLNA库版本号为libdlna-0.2.4 运行./configure出错: ------------------------------ Error, can't findlibavformat ...

  4. android CountDownTimer

    最近进行的项目使用的定时功能,我发现了一个非常容易使用内置类CountDownTimer.当然,可以使用这种效果TimerTask + Timer为了实现.只是我个人的意见CountDownTimer ...

  5. 使用JAVASCRIPT实现静态物体、静态方法和静态属性

    Javascript语言的面向对象特征非常弱.其它面向对象语言在创建类时仅仅要使用keywordstatic就可以指定类为静态类,Javascript没有提供static这种keyword.要让Jav ...

  6. 高仿快车100--实战RadioGroup和RadioButton应用

    1.RadioButtonCheckBox的差别: a.单个RadioButton在选中后,通过点击无法变为未选中 单个CheckBox在选中后.通过点击能够变为未选中 b.一组RadioButton ...

  7. MVC Controller向View传值(ViewData与ViewBag)

    近期在开发项目中,使用的是ASP.NET MVC因为之前并没有接触,对于它的传值方式有些陌生,在这里进行初步总结积累学习. 一:使用 ViewData使用: public ActionResult I ...

  8. [Python]How to handle the exception in Python?

    This post demonstrates how to use try clause to handle the exceptions def test_exception(case=None): ...

  9. 标准I/O缓冲:全缓冲、行缓冲、无缓冲

    说明:我仅仅对网络资源进行了整合,方便学习-.- 基于流的操作终于会调用read或者write函数进行I/O操作.为了使程序的执行效率最高,流对象一般会提供缓冲区,以降低调用系统I/O库函数的次数. ...

  10. Linux 0.12 内核管理存储器

    Linux 0.12 内核管理存储器 其分段,用分段的机制把进程间的虚拟地址分隔开. 每一个进程都有一张段表LDT.整个系统有一张GDT表.且整个系统仅仅有一个总页表. 其地址翻译过程为: 程序中给出 ...