Oracle DG之--构建Physical Standby（一主库对应多备库）
系统环境：
操作系统： RedHat EL6
Oracle: Oracle 10.2.0.1.0
如图所示，主库为bjdb（db_unique_name)，备库为shdb和gzdb。
案例分析：
一个主库，两个备库
主库初始化参数（pfile）：
[oracle@bjsrv dbs]$ cat initbj.ora
*.audit_file_dest='/u01/app/oracle/admin/prod/adump'
*.background_dump_dest='/u01/app/oracle/admin/prod/bdump'
*.compatible='10.2.0.1.0'
*.control_files='/u01/app/oracle/oradata/prod/control01.ctl','/disk1/oradata/bj/control02.ctl','/disk2/oradata/bj/control03.ctl'
*.core_dump_dest='/u01/app/oracle/admin/prod/cdump'
*.db_block_size=8192
*.db_domain=''
*.db_file_multiblock_read_count=16
*.DB_FILE_NAME_CONVERT='/u01/app/oracle/oradata/sh','/u01/app/oracle/oradata/prod','/u01/app/oracle/oradata/gz','/u01/app/oracle/oradata/prod'
*.db_recovery_file_dest='/u01/app/oracle/flash_recovery_area'
*.db_recovery_file_dest_size=2147483648
*.instance_name='bj'
*.job_queue_processes=10
*.open_cursors=300
*.pga_aggregate_target=94371840
*.processes=150
*.remote_login_passwordfile='EXCLUSIVE'
*.sga_target=285212672
*.undo_management='AUTO'
*.undo_tablespace='UNDOTBS1'
*.user_dump_dest='/u01/app/oracle/admin/prod/udump'以下参数用于DG配置：
*.db_name='prod'
*.DB_UNIQUE_NAME='bjdb'
*.FAL_CLIENT='bjdb'
*.FAL_SERVER='shdb','gzdb'
*.LOG_ARCHIVE_CONFIG='DG_CONFIG=(bjdb,shdb,gzdb)'
*.LOG_ARCHIVE_DEST_1='LOCATION=/disk3/arch_bj
VALID_FOR=(ALL_LOGFILES,ALL_ROLES)
DB_UNIQUE_NAME=bjdb'
*.LOG_ARCHIVE_DEST_2='SERVICE=shdb LGWR ASYNC
VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE)
DB_UNIQUE_NAME=shdb'
*.LOG_ARCHIVE_DEST_3='SERVICE=gzdb LGWR ASYNC
VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE)
DB_UNIQUE_NAME=gzdb'
*.LOG_ARCHIVE_DEST_STATE_1='ENABLE'
*.LOG_ARCHIVE_DEST_STATE_2='ENABLE'
*.LOG_ARCHIVE_DEST_STATE_3='ENABLE'
*.log_archive_format='arch_%t_%s_%r.log'
*.LOG_ARCHIVE_MAX_PROCESSES=3
*.LOG_FILE_NAME_CONVERT='/disk1/oradata/sh','/disk1/oradata/bj','/disk2/oradata/sh','/disk2/oradata/bj','/disk1/oradata/gz','/disk1/oradata/bj','/disk2/oradata/gz','/disk2/oradata/bj'
*.STANDBY_FILE_MANAGEMENT='AUTO'备库初始化参数pfile（shdb）：
[oracle@shsrv dbs]$ cat initsh.ora
*.audit_file_dest='/u01/app/oracle/admin/sh/adump'
*.background_dump_dest='/u01/app/oracle/admin/sh/bdump'
*.compatible='10.2.0.1.0'
*.control_files='/u01/app/oracle/oradata/sh/std_control.ctl'
*.core_dump_dest='/u01/app/oracle/admin/sh/cdump'
*.db_block_size=8192
*.db_domain=''
*.db_file_multiblock_read_count=16
*.DB_FILE_NAME_CONVERT='/u01/app/oracle/oradata/prod','/u01/app/oracle/oradata/sh','/u01/app/oracle/gz','/u01/app/oracle/oradata/sh'
*.instance_name='sh'
*.job_queue_processes=10
*.open_cursors=300
*.pga_aggregate_target=94371840
*.processes=150
*.remote_login_passwordfile='EXCLUSIVE'
*.sga_target=285212672
*.undo_management='AUTO'
*.undo_tablespace='UNDOTBS1'
*.user_dump_dest='/u01/app/oracle/admin/sh/udump'以下参数用于DG配置：
*.db_name='prod'
*.DB_UNIQUE_NAME='shdb'
*.FAL_CLIENT='shdb'
*.FAL_SERVER='bjdb','gzdb'
*.LOG_ARCHIVE_CONFIG='DG_CONFIG=(bjdb,shdb,gzdb)'
*.LOG_ARCHIVE_DEST_1='LOCATION=/disk3/arch_sh
VALID_FOR=(ALL_LOGFILES,ALL_ROLES)
DB_UNIQUE_NAME=shdb'
*.LOG_ARCHIVE_DEST_2='SERVICE=bjdb LGWR ASYNC
VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE)
DB_UNIQUE_NAME=bjdb'
*.LOG_ARCHIVE_DEST_3='SERVICE=gzdb LGWR ASYNC
VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE)
DB_UNIQUE_NAME=gzdb'
*.LOG_ARCHIVE_DEST_STATE_1='ENABLE'
*.LOG_ARCHIVE_DEST_STATE_2='ENABLE'
*.LOG_ARCHIVE_DEST_STATE_3='ENABLE'
*.log_archive_format='arch_%t_%s_%r.log'
*.LOG_ARCHIVE_MAX_PROCESSES=3
*.LOG_FILE_NAME_CONVERT='/disk1/oradata/bj','/disk1/oradata/sh','/disk2/oradata/bj','/disk2/oradata/sh','/disk1/oradata/gz','/disk1/oradata/sh','/disk2/oradata/gz','/disk2/oradata/sh'
*.STANDBY_FILE_MANAGEMENT='AUTO'备库初始化参数pfile（gzdb）：
[oracle@gzsrv dbs]$ cat initgz.ora
*.audit_file_dest='/u01/app/oracle/admin/gz/adump'
*.background_dump_dest='/u01/app/oracle/admin/gz/bdump'
*.compatible='10.2.0.1.0'
*.control_files='/u01/app/oracle/oradata/gz/gzstd_control.ctl'
*.core_dump_dest='/u01/app/oracle/admin/gz/cdump'
*.db_block_size=8192
*.db_domain=''
*.db_file_multiblock_read_count=16
*.DB_FILE_NAME_CONVERT='/u01/app/oracle/oradata/prod','/u01/app/oracle/oradata/gz','/u01/app/oracle/oradata/sh','/u01/app/oracle/oradata/gz'
*.open_cursors=300
*.pga_aggregate_target=94371840
*.processes=150
*.remote_login_passwordfile='EXCLUSIVE'
*.sga_target=285212672
*.undo_management='AUTO'
*.undo_tablespace='UNDOTBS1'
*.user_dump_dest='/u01/app/oracle/admin/gz/udump'
*.job_queue_processes=10以下参数用于DG配置：
*.db_name='prod'
*.DB_UNIQUE_NAME='gzdb'
*.FAL_CLIENT='gzdb'
*.FAL_SERVER='bjdb','shdb'
*.instance_name='gz'
*.LOG_ARCHIVE_CONFIG='DG_CONFIG=(bjdb,shdb,gzdb)'
*.LOG_ARCHIVE_DEST_1='LOCATION=/disk3/arch_gz
VALID_FOR=(ALL_LOGFILES,ALL_ROLES)
DB_UNIQUE_NAME=gzdb'
*.LOG_ARCHIVE_DEST_2='SERVICE=bjdb LGWR ASYNC
VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE)
DB_UNIQUE_NAME=bjdb'
*.LOG_ARCHIVE_DEST_3='SERVICE=shdb LGWR ASYNC
VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE)
DB_UNIQUE_NAME=shdb'
*.LOG_ARCHIVE_DEST_STATE_1='ENABLE'
*.LOG_ARCHIVE_DEST_STATE_2='ENABLE'
*.LOG_ARCHIVE_DEST_STATE_3='ENABLE'
*.log_archive_format='arch_%t_%s_%r.log'
*.LOG_ARCHIVE_MAX_PROCESSES=3
*.LOG_FILE_NAME_CONVERT='/disk1/oradata/bj','/disk1/oradata/gz','/disk2/oradata/bj','/disk2/oradata/gz','/disk1/oradata/sh','/disk1/oradata/gz','/disk2/oradata/sh','/disk2/oradata/gz'
*.STANDBY_FILE_MANAGEMENT='AUTO'---以上为构建一个主库2个Physical Standby的初始化参数，创建过程省略，可以参考：http://tiany.blog.51cto.com/513694/1583444《 Oracle DG之--构建Physical Standby》
