備份TB級別數據的一些技巧

1、 考慮使用增量備份， 不要老是想著用全量備份

2、 對于增量備份而言 開啟block change tracking 能極大地減少物理讀，提升速度

3、 11g以后對于bigfile tablespace可以啟用section size 來提升速度

4、 考慮到負載更低的 Data Guard物理備庫上去做備份

5、 啟用備份并行

CONFIGURE DEVICE TYPE DISK PARALLELISM 16;

6、 對于多節點RAC 使用 service控制負載均衡

srvctl add service –d -s -r -a ,

srvctl add service –d -s -r -a ,

For example

srvctl add service –d maclean –s bkup1 –r maclean1 –a maclean2,maclean3,maclean4,maclean5,maclean6,maclean7,maclean8

srvctl add service –d maclean –s bkup2 –r maclean2 –a maclean1,maclean3,maclean4,maclean5,maclean6,maclean7,maclean8

srvctl add service –d maclean –s bkup3 –r maclean3 –a maclean1,maclean2,maclean4,maclean5,maclean6,maclean7,maclean8

srvctl add service –d maclean –s bkup4 –r maclean4 –a maclean1,maclean2,maclean3,maclean5,maclean6,maclean7,maclean8

srvctl add service –d maclean –s bkup5 –r maclean5 –a maclean1,maclean2,maclean3,maclean4,maclean6,maclean7,maclean8

srvctl add service –d maclean –s bkup6 –r maclean6 –a maclean1,maclean2,maclean3,maclean4,maclean5,maclean7,maclean8

srvctl add service –d maclean –s bkup7 –r maclean7 –a maclean1,maclean2,maclean3,maclean4,maclean5,maclean6,maclean8

srvctl add service –d maclean –s bkup8 –r maclean8 –a maclean1,maclean2,maclean3,maclean4,maclean5,maclean6,maclean7

srvctl start service –d -s

Alternatively, to start all the services for a particular database

srvctl start service –d

run {

allocate channel ch01 connect string ‘sys/@/;

allocate channel ch02 connect string ‘sys/@/;

allocate channel ch16 connect string ‘sys/@/;

backup database …;

}

For example

run

{

allocate channel ch01 device type disk connect 'sys/welcome1@maclean-scan/bkup1';

allocate channel ch02 device type disk connect 'sys/welcome1@maclean-scan/bkup2';

allocate channel ch03 device type disk connect 'sys/welcome1@maclean-scan/bkup3';

allocate channel ch04 device type disk connect 'sys/welcome1@maclean-scan/bkup4';

allocate channel ch05 device type disk connect 'sys/welcome1@maclean-scan/bkup5';

allocate channel ch06 device type disk connect 'sys/welcome1@maclean-scan/bkup6';

allocate channel ch07 device type disk connect 'sys/welcome1@maclean-scan/bkup7';

allocate channel ch08 device type disk connect 'sys/welcome1@maclean-scan/bkup8';

allocate channel ch09 device type disk connect 'sys/welcome1@maclean-scan/bkup1';

allocate channel ch10 device type disk connect 'sys/welcome1@maclean-scan/bkup2';

allocate channel ch09 device type disk connect 'sys/welcome1@maclean-scan/bkup1';

allocate channel ch10 device type disk connect 'sys/welcome1@maclean-scan/bkup2';

allocate channel ch11 device type disk connect 'sys/welcome1@maclean-scan/bkup3';

allocate channel ch12 device type disk connect 'sys/welcome1@maclean-scan/bkup4';

allocate channel ch13 device type disk connect 'sys/welcome1@maclean-scan/bkup5';

allocate channel ch14 device type disk connect 'sys/welcome1@maclean-scan/bkup6';

allocate channel ch15 device type disk connect 'sys/welcome1@maclean-scan/bkup7';

allocate channel ch16 device type disk connect 'sys/welcome1@maclean-scan/bkup8';

backup

as backupset

incremental level 0

section size 128g

database;

}

總結

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