oracle数据库rman备份计划及恢复

1.rman完全恢复的前提条件：历史的datafile,controlfile和spfile备份，加上完整的archivelog和完好的redolog。

2.rman备份脚本：

　　a.RMAN 0级备份命令:

run{

allocate channel c1 type disk;

allocate channel c2 type disk;

allocate channel c3 type disk;

backup incremental level  tag  'level0'  format "E:\recovery_area\rfdb\rfdb\AUTOBACKUP\rman_dir\RFDB_level_0_%u_%s_%p"  as compressed backupset

database;

sql "alter system archive log current";

backup filesperset  format "E:\recovery_area\rfdb\rfdb\AUTOBACKUP\rman_dir\arch_%u_%s_%p_%c"

archivelog all delete input; #备份归档可选，可以单独定期备份

release channel c1;

release channel c2;

release channel c3;

}

rman_level_0

　　b.RMAN 1级备份命令:

run{

allocate channel c1 type disk;

allocate channel c2 type disk;

allocate channel c3 type disk;

backup incremental level  tag  'level1' format 'E:\recovery_area\rfdb\rfdb\AUTOBACKUP\rman_dir\RFDB_level_1_%u_%s_%p'   as compressed backupset

database;

sql 'alter system archive log current';

backup filesperset  format 'E:\recovery_area\rfdb\rfdb\AUTOBACKUP\rman_dir\arch_%u_%s_%p'

archivelog all delete input; #备份归档可选，可以单独定期备份

release channel c1;

release channel c2;

release channel c3;

}

rman_level_1

　　c.rman删除备份命令（在保留最近一天备份的情况下，删除其他备份）:

DELETE NOPROMPT OBSOLETE RECOVERY WINDOW OF  DAYS;

　　d.操作系统层面运行rman备份或删除命令(windows/linux)：

rman target sys/rf4rfvbgt56yhn@rfdb nocatalog CMDFILE 'D:\app\rman\rman_file\level_0.txt' log=E:\recovery_area\rfdb\rfdb\AUTOBACKUP\rman_dir\log\rman_level_0.log

export ORACLE_BASE=/u01/app/oracle

export ORACLE_HOME=/u01/app/oracle/product/11.2./db1

export ORACLE_SID=atest

export PATH=$ORACLE_HOME/bin:$PATH

rman target sys/@atest nocatalog CMDFILE '/u01/rman/rman.sh' log=/u01/rman/rman.log

  * *   bash /u01/rman_file/run_rman_0.sh

  * *   bash /u01/rman_file/run_rman_0.sh

  * *   bash /u01/rman_file/run_rman_0.sh

  * * *  bash /u01/rman_file/run_delete.sh

  * * *  bash /u01/rman_file/run_rman_0.sh

　　e.rman参数设置：

RMAN> CONFIGURE CONTROLFILE AUTOBACKUP ON;
RMAN> CONFIGURE DEFAULT DEVICE TYPE TO DISK;

RMAN> CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE disk TO ;

RMAN> CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE disk TO ;

3.rman恢复

a.拷贝datafile,controlfile和spfile的rman备份，以及完整的archivelog和完好的redolog文件到新的数据库。

b.切换至oracle用户，进入rman（先设置sid）：

export ORACLE_SID=rfdb

rlwrap  rman target /

c.启动一个伪实例：

RMAN> startup nomount

connected to target database (not started)

startup failed: ORA-: failure in processing system parameters

LRM-: could not open parameter file '/u01/app/oracle/product/11.2.0/db1/dbs/initrfdb.ora'

starting Oracle instance without parameter file for retrieval of spfile

Oracle instance started

Total System Global Area     bytes

Fixed Size                      bytes

Variable Size                 bytes

Database Buffers              bytes

Redo Buffers                    bytes

d.在伪实例下恢复spfile文件（必须要指定rman的备份片）：

RMAN> restore spfile from "/u01/ora_bak/ora_bak/autobackup/2015_12_07/o1_mf_s_897845728_c6bnq1rq_.bkp";

Starting restore at -DEC-

using channel ORA_DISK_1

channel ORA_DISK_1: restoring spfile from AUTOBACKUP /u01/ora_bak/ora_bak/autobackup/2015_12_07/o1_mf_s_897845728_c6bnq1rq_.bkp

channel ORA_DISK_1: SPFILE restore from AUTOBACKUP complete

Finished restore at -DEC-

e.关闭伪实例，用spfile文件启动至nomount状态：

RMAN> shutdown abort

Oracle instance shut down

RMAN> startup nomount

connected to target database (not started)

Oracle instance started

Total System Global Area     bytes

Fixed Size                      bytes

Variable Size                 bytes

Database Buffers              bytes

Redo Buffers                    bytes

f.恢复控制文件（必须要指定rman的备份片，备份片应该和spfile的恢复片是同一个）：

RMAN> restore controlfile from "/u01/ora_bak/ora_bak/autobackup/2015_12_07/o1_mf_s_897845728_c6bnq1rq_.bkp";

Starting restore at -DEC-

allocated channel: ORA_DISK_1

channel ORA_DISK_1: SID= device type=DISK

channel ORA_DISK_1: restoring control file

channel ORA_DISK_1: restore complete, elapsed time: ::

output file name=/u01/app/oracle/oradata/ATEST/controlfile/o1_mf_c5fr9b0h_.ctl

output file name=/u01/app/oracle/fast_recovery_area/ATEST/controlfile/o1_mf_c5fr9b6n_.ctl

Finished restore at -DEC-

g.启动数据库至mount状态：

RMAN> alter database mount;

database mounted

released channel: ORA_DISK_1

h.把拷贝到新机器的备份文件注册到（刚恢复的）控制文件中（redolog不能被注册，所以最后有报错，没有关系）：

RMAN> catalog start with "/u01/ora_bak";

Starting implicit crosscheck backup at -DEC-

allocated channel: ORA_DISK_1

channel ORA_DISK_1: SID= device type=DISK

Crosschecked  objects

Finished implicit crosscheck backup at -DEC-

Starting implicit crosscheck copy at -DEC-

using channel ORA_DISK_1

Finished implicit crosscheck copy at -DEC-

searching for all files in the recovery area

cataloging files...

cataloging done

List of Cataloged Files

=======================

File Name: /u01/app/oracle/fast_recovery_area/ATEST/backupset/2015_12_09/o1_mf_nnndf_TAG20151209T161546_c6hrslnq_.bkp

File Name: /u01/app/oracle/fast_recovery_area/ATEST/autobackup/2015_12_09/o1_mf_s_898014415_c6hsghgm_.bkp

File Name: /u01/app/oracle/fast_recovery_area/ATEST/autobackup/2015_12_09/o1_mf_s_898013812_c6hrvo18_.bkp

searching for all files that match the pattern /u01/ora_bak

List of Files Unknown to the Database

=====================================

File Name: /u01/ora_bak/O1_MF_S_895896351_C4KSF2YN_.BKP

File Name: /u01/ora_bak/ora_bak/arch/1_11_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_23_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_19_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_33_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_8_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_9_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_17_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_21_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_20_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_12_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_6_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_14_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_26_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_24_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_30_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_16_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_22_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_7_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_27_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_31_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_25_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_29_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_28_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_13_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_18_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_10_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_15_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_32_896812716.dbf

File Name: /u01/ora_bak/ora_bak/controlfile/o1_mf_c5fr9b6n_.ctl

File Name: /u01/ora_bak/ora_bak/onlinelog_f/o1_mf_2_c5fr9h1f_.log

File Name: /u01/ora_bak/ora_bak/onlinelog_f/o1_mf_3_c5fr9kfo_.log

File Name: /u01/ora_bak/ora_bak/onlinelog_f/o1_mf_1_c5fr9ds4_.log

File Name: /u01/ora_bak/ora_bak/onlinelog/o1_mf_3_c5fr9k9d_.log

File Name: /u01/ora_bak/ora_bak/onlinelog/o1_mf_2_c5fr9gy5_.log

File Name: /u01/ora_bak/ora_bak/onlinelog/o1_mf_1_c5fr9dmk_.log

File Name: /u01/ora_bak/ora_bak/backupset/2015_12_07/o1_mf_nnndf_TAG20151207T173421_c6bnnxsl_.bkp

File Name: /u01/ora_bak/ora_bak/autobackup/2015_12_07/o1_mf_s_897845728_c6bnq1rq_.bkp

File Name: /u01/ora_bak/O1_MF_S_895896118_C4KS5S1R_.BKP

Do you really want to catalog the above files (enter YES or NO)? yes

cataloging files...

cataloging done

List of Cataloged Files

=======================

File Name: /u01/ora_bak/ora_bak/arch/1_11_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_23_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_19_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_33_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_8_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_9_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_17_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_21_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_20_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_12_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_6_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_14_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_26_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_24_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_30_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_16_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_22_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_7_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_27_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_31_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_25_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_29_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_28_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_13_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_18_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_10_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_15_896812716.dbf

File Name: /u01/ora_bak/ora_bak/arch/1_32_896812716.dbf

File Name: /u01/ora_bak/ora_bak/backupset/2015_12_07/o1_mf_nnndf_TAG20151207T173421_c6bnnxsl_.bkp

File Name: /u01/ora_bak/ora_bak/autobackup/2015_12_07/o1_mf_s_897845728_c6bnq1rq_.bkp

List of Files Which Where Not Cataloged

=======================================

File Name: /u01/ora_bak/O1_MF_S_895896351_C4KSF2YN_.BKP

  RMAN-: Reason: Foreign database file DBID:   Database Name: RFDB

File Name: /u01/ora_bak/ora_bak/controlfile/o1_mf_c5fr9b6n_.ctl

  RMAN-: Reason: Error while cataloging. See alert.log.

File Name: /u01/ora_bak/ora_bak/onlinelog_f/o1_mf_2_c5fr9h1f_.log

  RMAN-: Reason: catalog is not supported for this file type

File Name: /u01/ora_bak/ora_bak/onlinelog_f/o1_mf_3_c5fr9kfo_.log

  RMAN-: Reason: catalog is not supported for this file type

File Name: /u01/ora_bak/ora_bak/onlinelog_f/o1_mf_1_c5fr9ds4_.log

  RMAN-: Reason: catalog is not supported for this file type

File Name: /u01/ora_bak/ora_bak/onlinelog/o1_mf_3_c5fr9k9d_.log

  RMAN-: Reason: catalog is not supported for this file type

File Name: /u01/ora_bak/ora_bak/onlinelog/o1_mf_2_c5fr9gy5_.log

  RMAN-: Reason: catalog is not supported for this file type

File Name: /u01/ora_bak/ora_bak/onlinelog/o1_mf_1_c5fr9dmk_.log

  RMAN-: Reason: catalog is not supported for this file type

File Name: /u01/ora_bak/O1_MF_S_895896118_C4KS5S1R_.BKP

  RMAN-: Reason: Foreign database file DBID:   Database Name: RFDB

i.开始restore数据文件：

RMAN> restore database;

Starting restore at -DEC-

using channel ORA_DISK_1

channel ORA_DISK_1: starting datafile backup set restore

channel ORA_DISK_1: specifying datafile(s) to restore from backup set

channel ORA_DISK_1: restoring datafile  to /u01/app/oracle/oradata/ATEST/datafile/o1_mf_system_c5fr6s3v_.dbf

channel ORA_DISK_1: restoring datafile  to /u01/app/oracle/oradata/ATEST/datafile/o1_mf_sysaux_c5fr6s6d_.dbf

channel ORA_DISK_1: restoring datafile  to /u01/app/oracle/oradata/ATEST/datafile/o1_mf_undotbs1_c5fr6s7n_.dbf

channel ORA_DISK_1: restoring datafile  to /u01/app/oracle/oradata/ATEST/datafile/o1_mf_users_c5fr6s88_.dbf

channel ORA_DISK_1: reading from backup piece /u01/app/oracle/fast_recovery_area/ATEST/backupset/2015_12_09/o1_mf_nnndf_TAG20151209T161546_c6hrslnq_.bkp

channel ORA_DISK_1: piece handle=/u01/app/oracle/fast_recovery_area/ATEST/backupset/2015_12_09/o1_mf_nnndf_TAG20151209T161546_c6hrslnq_.bkp tag=TAG20151209T161546

channel ORA_DISK_1: restored backup piece

channel ORA_DISK_1: restore complete, elapsed time: ::

Finished restore at -DEC-

j.开始recover数据（在此之前，需要先拷贝redolog到控制文件默认的路径下）：

redolog默认路径：

SQL> select member from v$logfile;

MEMBER

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

/u01/app/oracle/oradata/ATEST/onlinelog/o1_mf_3_c5fr9k9d_.log

/u01/app/oracle/fast_recovery_area/ATEST/onlinelog/o1_mf_3_c5fr9kfo_.log

/u01/app/oracle/oradata/ATEST/onlinelog/o1_mf_2_c5fr9gy5_.log

/u01/app/oracle/fast_recovery_area/ATEST/onlinelog/o1_mf_2_c5fr9h1f_.log

/u01/app/oracle/oradata/ATEST/onlinelog/o1_mf_1_c5fr9dmk_.log

/u01/app/oracle/fast_recovery_area/ATEST/onlinelog/o1_mf_1_c5fr9ds4_.log

 rows selected.

开始recover数据库：

RMAN> recover database;

Starting recover at -DEC-

using target database control file instead of recovery catalog

allocated channel: ORA_DISK_1

channel ORA_DISK_1: SID= device type=DISK

starting media recovery

archived log for thread  with sequence  is already on disk as file /u01/ora_bak/ora_bak/arch/1_15_896812716.dbf

archived log for thread  with sequence  is already on disk as file /u01/ora_bak/ora_bak/arch/1_16_896812716.dbf

archived log for thread  with sequence  is already on disk as file /u01/ora_bak/ora_bak/arch/1_17_896812716.dbf

archived log for thread  with sequence  is already on disk as file /u01/ora_bak/ora_bak/arch/1_18_896812716.dbf

archived log for thread  with sequence  is already on disk as file /u01/ora_bak/ora_bak/arch/1_19_896812716.dbf

archived log for thread  with sequence  is already on disk as file /u01/ora_bak/ora_bak/arch/1_20_896812716.dbf

archived log for thread  with sequence  is already on disk as file /u01/ora_bak/ora_bak/arch/1_21_896812716.dbf

archived log for thread  with sequence  is already on disk as file /u01/ora_bak/ora_bak/arch/1_22_896812716.dbf

archived log for thread  with sequence  is already on disk as file /u01/ora_bak/ora_bak/arch/1_23_896812716.dbf

archived log for thread  with sequence  is already on disk as file /u01/ora_bak/ora_bak/arch/1_24_896812716.dbf

archived log for thread  with sequence  is already on disk as file /u01/ora_bak/ora_bak/arch/1_25_896812716.dbf

archived log for thread  with sequence  is already on disk as file /u01/ora_bak/ora_bak/arch/1_26_896812716.dbf

archived log for thread  with sequence  is already on disk as file /u01/ora_bak/ora_bak/arch/1_27_896812716.dbf

archived log for thread  with sequence  is already on disk as file /u01/ora_bak/ora_bak/arch/1_28_896812716.dbf

archived log for thread  with sequence  is already on disk as file /u01/ora_bak/ora_bak/arch/1_29_896812716.dbf

archived log for thread  with sequence  is already on disk as file /u01/ora_bak/ora_bak/arch/1_30_896812716.dbf

archived log for thread  with sequence  is already on disk as file /u01/ora_bak/ora_bak/arch/1_31_896812716.dbf

archived log for thread  with sequence  is already on disk as file /u01/app/oracle/oradata/ATEST/onlinelog/o1_mf_2_c5fr9gy5_.log

archived log for thread  with sequence  is already on disk as file /u01/app/oracle/oradata/ATEST/onlinelog/o1_mf_3_c5fr9k9d_.log

archived log for thread  with sequence  is already on disk as file /u01/app/oracle/oradata/ATEST/onlinelog/o1_mf_1_c5fr9dmk_.log

archived log file name=/u01/ora_bak/ora_bak/arch/1_15_896812716.dbf thread= sequence=

archived log file name=/u01/ora_bak/ora_bak/arch/1_16_896812716.dbf thread= sequence=

archived log file name=/u01/ora_bak/ora_bak/arch/1_17_896812716.dbf thread= sequence=

archived log file name=/u01/ora_bak/ora_bak/arch/1_18_896812716.dbf thread= sequence=

archived log file name=/u01/ora_bak/ora_bak/arch/1_19_896812716.dbf thread= sequence=

archived log file name=/u01/ora_bak/ora_bak/arch/1_20_896812716.dbf thread= sequence=

archived log file name=/u01/ora_bak/ora_bak/arch/1_21_896812716.dbf thread= sequence=

archived log file name=/u01/ora_bak/ora_bak/arch/1_22_896812716.dbf thread= sequence=

archived log file name=/u01/ora_bak/ora_bak/arch/1_23_896812716.dbf thread= sequence=

archived log file name=/u01/ora_bak/ora_bak/arch/1_24_896812716.dbf thread= sequence=

archived log file name=/u01/ora_bak/ora_bak/arch/1_25_896812716.dbf thread= sequence=

archived log file name=/u01/ora_bak/ora_bak/arch/1_26_896812716.dbf thread= sequence=

archived log file name=/u01/ora_bak/ora_bak/arch/1_27_896812716.dbf thread= sequence=

archived log file name=/u01/ora_bak/ora_bak/arch/1_28_896812716.dbf thread= sequence=

archived log file name=/u01/ora_bak/ora_bak/arch/1_29_896812716.dbf thread= sequence=

archived log file name=/u01/ora_bak/ora_bak/arch/1_30_896812716.dbf thread= sequence=

archived log file name=/u01/ora_bak/ora_bak/arch/1_31_896812716.dbf thread= sequence=

archived log file name=/u01/app/oracle/oradata/ATEST/onlinelog/o1_mf_2_c5fr9gy5_.log thread= sequence=

archived log file name=/u01/app/oracle/oradata/ATEST/onlinelog/o1_mf_3_c5fr9k9d_.log thread= sequence=

archived log file name=/u01/app/oracle/oradata/ATEST/onlinelog/o1_mf_1_c5fr9dmk_.log thread= sequence=

media recovery complete, elapsed time: ::

Finished recover at -DEC-

k.以resetlogs打开数据库（在此之前，先删除原来的redolog，因为数据库会重新创建一组redolog）：

删除原来的redo：

rm -rf /u01/app/oracle/oradata/ATEST/onlinelog/*

以resetlogs打开数据库：

RMAN> alter database open resetlogs;

using target database control file instead of recovery catalog

database opened

至此，数据库恢复全部完成！

---恢复内容结束---

oracle数据库rman备份计划及恢复的更多相关文章

oracle数据库rman备份与还原
我是oracle 界的小白,由于公司领导要求,不得不硬着头皮在网上找rman备份还原的方法,废话不多说,具体看例子(window) 运行CMD: rman target 管理员账号/密码@orcl 备 ...
Oracle数据库的备份方法
1.引言 Oracle数据库的备份方法很多,无论使用那种备份方法,备份的目的都是为了在出现故障后能够以尽可能小的时间和代价恢复系统.比如使用export实用程序导出数据库对象.使用Oracle备份数据 ...
DG环境数据库RMAN备份策略制定
DG环境数据库RMAN备份策略制定: 主库(Primary) 全库备份归档备份删除历史文件夹备库(Standby) 删除归档引用说明主库(Primary) $ crontab -l 0 1 ...
ORACLE数据库不同故障下的恢复总结
ORACLE数据库不同故障下的恢复总结1. 非归档模式下丢失或损坏的文件--1.1 数据文件--启动数据库的状态到MOUNT--恢复方法:通过之前创建的数据库完整备份,修复整个数据库,不过备份之后发生 ...
说明Oracle数据库逻辑备份和物理备份的方式。
说明Oracle数据库逻辑备份和物理备份的方式. 解答:Oracle备份包括逻辑备份和物理备份. 1)．逻辑备份数据库的逻辑备份包含读一个数据库记录集和将记录集写入文件. a.输出(Export)输 ...
oracle 数据库数据备份
oracle 数据库数据备份 1.使用oracle用户应该就可以进行数据备份(不需要root用户):su oracle 查oracle实例名:echo $ORACLE_SID 例如查出来的 ...
Windows下Oracle数据库自动备份批处理脚本
expdb命令版本 @echo off REM ########################################################### REM # Windows Se ...
Oracle之RMAN备份恢复1-基础篇
1,rman的作用与体系架构 1.1 什么是rman rman(recovery manager)是oracle8i以后dba的一重要工具一般位于$oracle_home/bin目录下,主要用来备份, ...
oracle数据库rman异地恢复
自己想做两组rac之间的data guard,由于datafile,controlfile,甚至是archivelog都是存放在asm上的,直接复制数据有点不现实,asm磁盘总归都是要用的,所以想从a ...

随机推荐

Cesium原理篇：6 Render模块(4: FBO)
Cesium不仅仅提供了FBO,也就是Framebuffer类,而且整个渲染过程都是在FBO中进行的.FBO,中文就是帧缓冲区,通常都属于高级用法,但其实,如果你了解了它的基本原理后,用起来还是很简单 ...
Cesium原理篇：6 Render模块(5: VAO&RenderState&Command)
VAO VAO(Vertext Array Object),中文是顶点数组对象.之前在<Buffer>一文中,我们介绍了Cesium如何创建VBO的过程,而VAO可以简单的认为是基于VBO ...
将文本文件的内容存储在DataSet中的方法总结
项目中比较多的会对文件进行操作,例如文件的上传下载,文件的压缩和解压等IO操作.在.NET项目中较多的会使用DataSet,DataTable进行数据的缓存. 项目中对文本文件的操作比较简单,但是如果 ...
Hadoop NameNode的ZKFC机制
博客原文:hackershell 之前在准备中级课程PPT,整理了下HA的基本内容,并且感谢松哥为我们提供了HA不会切的问题,以至于之后刚好出现的NameNode宕机,能够快速解决. NameNode ...
mybatis入门基础(八)-----查询缓存
一.什么是查询缓存 mybatis提供查询缓存,用于减轻数据压力,提高数据库性能. mybaits提供一级缓存,和二级缓存. 1.1. 一级缓存是sqlSession级别的缓存.在操作数据库时需要构造 ...
基于OpenSLL的RSA加密应用(非算法)
基于OpenSLL的RSA加密应用(非算法) iOS开发中的小伙伴应该是经常用der和p12进行加密解密,而且在通常加密不止一种加密算法,还可以加点儿盐吧~本文章主要阐述的是在iOS中基于openSL ...
迷惑很久，仅以个人想法谈谈MVC架构，希望大家多给点意见
博主是非科班出身,所以和大部分新手有着一样的困惑,究竟什么才能算是MVC框架,总是在谈Model,View,Controller分离,可是究竟什么才能算是分离,而他们又是负责什么样的分工呢. 大二的时 ...
LINQ to SQL语句(16)之对象标识
对象标识运行库中的对象具有唯一标识.引用同一对象的两个变量实际上是引用此对象的同一实例.你更改一个变量后,可以通过另一个变量看到这些更改. 关系数据库表中的行不具有唯一标识.由于每一行都具有唯一的主 ...
HighchartsNET快速图表控件-开源
前言: HighchartsNET快速图表控件,基于Highcharts的asp.net web控件.只需几行代码你就能快速生成一个图表. 从此不再担心图表复杂.简单几行代码就可以搞定,节省大量工作时 ...
鼠标移到导航上面当前的LI变色处于当前的位置
鼠标移到导航上面当前的LI变色处于当前的位置,广泛应用于当前导航. 点击这里查看效果以下是源代码: <html> <head> <meta http-equiv=& ...

oracle数据库rman备份计划及恢复

oracle数据库rman备份计划及恢复的更多相关文章

随机推荐

热门专题