dataguard搭建-rac到單機
阿新 • • 發佈：2017-05-09
dataguard rac到單機
一 檢查源端,打開歸檔
SQL>archive log list; #如果未打開，關閉數據庫 Shutdown immediate; #啟動至mount狀態 Startup mount #開啟歸檔 SQL> alter database archivelog ; Database altered. #打開強制日誌，不打開，使nologging選項時，備庫的表會報錯 SQL> alter database force logging; Database altered. SQL> alter database open; Database altered. #檢查 SQL> archive log list; Database log mode Archive Mode Automatic archival Enabled Archive destination /data/arch Oldest online log sequence 12 Next log sequence to archive 14 Current log sequence 14 SQL> select force_logging from v$database; FORCE --- YES
二 更改參數
alter system set log_archive_config=‘DG_CONFIG=(db,standby)‘ scope=both; alter system set log_archive_dest=‘‘ scope=both; alter system set log_archive_dest_1=‘location=/data/arch‘ scope=spfile; --用歸檔傳輸 alter system set log_archive_dest_2=‘service=standby arch valid_for=(online_logfiles,primary_role) db_unique_name=standby‘ scope=spfile; --首選在線日誌傳輸，實時應用 alter system set log_archive_dest_2=‘service=standby lgwr sync affirm valid_for=(online_logfiles,primary_role) db_unique_name=standby‘ scope=both; SQL> alter system set log_archive_max_processes=4 scope=both; SQL> alter system set fal_server=standby scope=both; SQL> alter system set fal_client=db scope=both; SQL> alter system set standby_file_management=auto scope=both; SQL> alter system set db_file_name_convert=‘+data‘,‘/data‘ scope=spfile; SQL> alter system set log_file_name_convert=‘+data‘,‘/data‘ scope=spfile; Sql>alter system set db_unique_name=db scope=spfile; #先不啟用 SQL>alter system set log_archive_dest_state_2=defer;
三 配置tnsnames
服務端$ORACLE_HOME/network/admin/tnsnames.ora
standby =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.84.17)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = standby)
)
)四 備份主庫：
rman "target / nocatalog"
run{
configure default device type to disk;
configure device type disk parallelism 1;
backup as compressed backupset database format ‘/home/oracle/full_%s_%p_%T.bak‘ TAG fullbak_fordg;
}五 創建standby controlfile：
創建standby controlfile：
SQL> alter database create standby controlfile as ‘/home/oracle/standby.ctl‘;
六 創建pfile
create pfile=‘/data/backup/pfile.ora‘ from spfile;
主要修改db_unique_name
Fal_server
Fal_client
參考如下：
*.audit_file_dest=‘/opt/db/adump‘ *.audit_trail=‘none‘ *.cluster_database=false *.compatible=‘11.2.0.4.0‘ *.db_file_name_convert=‘+DATA‘,‘/data‘ *.log_file_name_convert=‘+DATA‘,‘/data‘ *.control_files=‘/u01/data/ctl_01.ctl‘ *.log_archive_config=‘DG_CONFIG=(db,standby)‘ *.db_block_size=8192 *.db_create_file_dest=‘/data‘ *.db_domain=‘‘ *.db_files=200 *.db_name=‘db‘ *.db_unique_name=‘standby‘ *.db_recovery_file_dest_size=53477376000 *.db_recovery_file_dest=‘‘ *.deferred_segment_creation=FALSE *.diagnostic_dest=‘/u01/app/oracle‘ *.dispatchers=‘(PROTOCOL=TCP) (SERVICE=TCIS30XDB)‘ *.log_archive_dest_1=‘location=/data/arch valid_for=(all_logfiles,all_roles) db_unique_name=standby‘ *.open_cursors=100 *.pga_aggregate_target=50MB *.processes=100 *.remote_login_passwordfile=‘exclusive‘ *.sessions=150 *.sga_target=100MB *.undo_tablespace=‘UNDOTBS1‘ *.fal_server=db
七 創建密鑰文件
orapwd file=orapw$ORACLE_SID password=oracle
八 創建備庫 listener.ora
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /opt/product/11.2)
(PROGRAM = extproc)
)
(SID_DESC =
(GLOBAL_DBNAME = standby)
(ORACLE_HOME = /opt/product/11.2)
(SID_NAME = sid_name)
)
)9 備機創建目錄
mkdir /data/arch
mkdir /data/dg1
mkdir –p /u01/app/oracle/admin/standby/adump
更改~/.bash_profile
Export ORACLE_SID=standby
10啟動及恢復
cp standby.ctl /data/standby/ctl01.ctl SQL> startup nomount; SQL> alter database mount standby database; rman target / catalog start with ‘/home/oracle/backup‘; Restore database; SQL>recover managed standby database disconnect from session;
11 備庫添加standby log file;
alter database recover managed standby database cancel alter database add standby logfile thread 1 group 10 ‘+data(flashfile)‘ size 50m; alter database add standby logfile thread 1 group 11 ‘+data(flashfile)‘ size 50m; alter database add standby logfile thread 2 group 12 ‘+data(flashfile)‘ size 50m; alter database add standby logfile thread 2 group 13 ‘+data(flashfile)‘ size 50m; alter database add standby logfile group 14 ‘/u01/data/standbyredo09.log‘ size 50m;
#主庫啟用日誌傳送
SQL>alter system set log_archive_dest_state_2=enabled;
#模式為最大可用
SQL>alter database set standby database to maximize availability; alter database recover managed standby database cancel; alter database open; alter database recover managed standby database using current logfile disconnect from session;
12 檢查
select process,client_process,sequence#,status from v$managed_standby;
col current_scn for 999999999999;
select protection_mode,database_role,open_mode,current_scn from v$database
col name for a50 ;
col sequence# for 9999999;
select name,sequence#,to_char(completion_time,‘yyyy-mm-dd hh24:mi:ss‘) from v$archived_log order by 2;
SELECT PROCESS, STATUS, THREAD#, SEQUENCE#, BLOCK#, BLOCKS FROM V$MANAGED_STANDBY;
--主庫查詢
select sequence#,status from v$Log;
col value for a30;
col name for a13;
col unit for a30;
select name,value,unit,time_computed from v$dataguard_stats;
SELECT * FROM V$STANDBY_EVENT_HISTOGRAM WHERE NAME = ‘apply lag‘ AND COUNT > 0;
col checkpoint_change# for 99999999999999;
select name,checkpoint_change# from v$datafile;
select name,checkpoint_change# from v$datafile_header;
SELECT DBID,
NAME,
TO_CHAR(CREATED, ‘DD-MON-YYYY HH24:MI:SS‘) CREATED,
OPEN_MODE,
LOG_MODE,
TO_CHAR(CHECKPOINT_CHANGE#, ‘999999999999999‘) AS CHECKPOINT_CHANGE#,
CONTROLFILE_TYPE,
TO_CHAR(CONTROLFILE_CHANGE#, ‘999999999999999‘) AS CONTROLFILE_CHANGE#,
TO_CHAR(CONTROLFILE_TIME, ‘DD-MON-YYYY HH24:MI:SS‘) CONTROLFILE_TIME,
TO_CHAR(RESETLOGS_CHANGE#, ‘999999999999999‘) AS RESETLOGS_CHANGE#,
TO_CHAR(RESETLOGS_TIME, ‘DD-MON-YYYY HH24:MI:SS‘) RESETLOGS_TIME
FROM V$DATABASE;
--sofar 單位為KBselect * from v$recovery_progress; --檢查歸檔應用情況 col name for a50 ; col sequence# for 9999999; select name,sequence#,to_char(completion_time,‘yyyy-mm-dd hh24:mi:ss‘) from v$archived_log order by 2; SELECT PROCESS, STATUS, THREAD#, SEQUENCE#, BLOCK#, BLOCKS FROM V$MANAGED_STANDBY; select thread#,max(sequence#) maxseq from gv$archived_log group by thread# order by thread#; select * from v$archive_gap; --檢查net_timeout的適當值 select frequency,duration from v$redo_dest_resp_histogram where dest_id=2 and frequency>1; select recovery_mode from v$archive_dest_status where dest_id=2;
本文出自 “snowhill” 博客，請務必保留此出處http://snowhill.blog.51cto.com/339421/1923591
dataguard搭建-rac到單機