通过下面sql查询参数文件在ASM磁盘中的AU分布
SELECT x1.file_number, x1.name, x2.GROUP_KFFXP, x2.DISK_KFFXP, x2.AU_KFFXP, x3.path FROM (SELECT * FROM (SELECT t1.GROUP_NUMBER, t1.FILE_NUMBER, t2.NAME, rownum AS rn FROM v$asm_file t1 LEFT JOIN v$asm_alias t2 ON t1.FILE_NUMBER = t2.FILE_NUMBER WHERE t1.type = ‘PARAMETERFILE‘) WHERE rn = 1) x1 JOIN x$kffxp x2 ON x1.file_number = x2.number_kffxp JOIN v$asm_disk x3 ON x3.GROUP_NUMBER = x2.GROUP_KFFXP 18 AND x3.DISK_NUMBER = x2.disk_kffxp 19 ; FILE_NUMBER NAME GROUP_KFFXP DISK_KFFXP AU_KFFXP PATH ----------- -------------------- ----------- ---------- ---------- --------------- 265 spfileorcl.ora 1 0 1015 /dev/asm-diskb 265 spfileorcl.ora 1 1 1018 /dev/asm-diskc
由于asm磁盘组是冗余方式，这里从其中一个disk复制即可
下面通过dd命令复制
[root@localhost ~]# dd if=/dev/asm-diskb skip=1015 of=/tmp/spfile01.ora bs=1024k count=1 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.004159 seconds, 252 MB/s [root@localhost ~]# strings /tmp/spfile01.ora orcl.__db_cache_size=96468992 orcl.__java_pool_size=4194304 orcl.__large_pool_size=4194304 orcl.__oracle_base=‘/u01/app/oracle‘#ORACLE_BASE set from environment orcl.__pga_aggregate_target=150994944 orcl.__sga_target=268435456 orcl.__shared_io_pool_size=0 orcl.__shared_pool_size=155189248 orcl.__streams_pool_size=0 *.audit_file_dest=‘/u01/app/oracle/admin/orcl/adump‘ *.audit_trail=‘db‘ *.compatible=‘11.2.0.0.0‘ *.control_files=‘+DATA/orcl/controlfile/current.260.855531771‘,‘+FRA/orcl /controlfile/current.256.855531771‘ *.db_block_size=8192 *.db_create_file_dest=‘+DATA‘ *.db_domain=‘‘ *.db_name=‘orcl‘ *.db_recovery_file_dest=‘+FRA‘ *.db_recovery_file_dest_size=4070572032 *.diagnostic_dest=‘/u01/app/oracle‘ *.dispatchers=‘(PROTOCOL=TCP) (SERVICE=orclXDB)‘ *.memory_target=418381824 *.nls_language=‘SIMPLIFIED CHINESE‘ *.nls_territory=‘CHINA‘ *.open_cursors=300 *.processes=150 *.remote_login_passwordfile=‘EXCLUSIVE‘ *.undo_tablespace=‘UNDOTBS1‘
也可以根据下面命令dd，由于默认AU size为1M，块为8k, 也就是1个au 等于 1m/8k=128个快，因此如果按照Oracle快计算可知要跳过1015*(1m/8k)=129920个数据快，那么从1299920到后面的连续128个数据块就是参数文件内容了，然后dd如下
[root@localhost ~]# dd if=/dev/asm-diskb of=/tmp/spfile2.ora bs=8192 skip=129920 count=128 128+0 records in 128+0 records out 1048576 bytes (1.0 MB) copied, 0.003003 seconds, 349 MB/s [root@localhost ~]# strings /tmp/spfile2.ora orcl.__db_cache_size=96468992 orcl.__java_pool_size=4194304 orcl.__large_pool_size=4194304 orcl.__oracle_base=‘/u01/app/oracle‘#ORACLE_BASE set from environment orcl.__pga_aggregate_target=150994944 orcl.__sga_target=268435456 orcl.__shared_io_pool_size=0 orcl.__shared_pool_size=155189248 orcl.__streams_pool_size=0 *.audit_file_dest=‘/u01/app/oracle/admin/orcl/adump‘ *.audit_trail=‘db‘ *.compatible=‘11.2.0.0.0‘ *.control_files=‘+DATA/orcl/controlfile/current.260.855531771‘,‘+FRA/orcl /controlfile/current.256.855531771‘ *.db_block_size=8192 *.db_create_file_dest=‘+DATA‘ *.db_domain=‘‘ *.db_name=‘orcl‘ *.db_recovery_file_dest=‘+FRA‘ *.db_recovery_file_dest_size=4070572032 *.diagnostic_dest=‘/u01/app/oracle‘ *.dispatchers=‘(PROTOCOL=TCP) (SERVICE=orclXDB)‘ *.memory_target=418381824 *.nls_language=‘SIMPLIFIED CHINESE‘ *.nls_territory=‘CHINA‘ *.open_cursors=300 *.processes=150 *.remote_login_passwordfile=‘EXCLUSIVE‘ *.undo_tablespace=‘UNDOTBS1‘
可以看到两种dd方式内容一致。
下面是从disk /dev/asm-diskc中复制
[root@localhost ~]# dd if=/dev/asm-diskc of=/tmp/spfile3.ora bs=1024k skip=1018 count=1 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.05252 seconds, 20.0 MB/s [root@localhost ~]# strings /tmp/spfile3.ora orcl.__db_cache_size=96468992 orcl.__java_pool_size=4194304 orcl.__large_pool_size=4194304 orcl.__oracle_base=‘/u01/app/oracle‘#ORACLE_BASE set from environment orcl.__pga_aggregate_target=150994944 orcl.__sga_target=268435456 orcl.__shared_io_pool_size=0 orcl.__shared_pool_size=155189248 orcl.__streams_pool_size=0 *.audit_file_dest=‘/u01/app/oracle/admin/orcl/adump‘ *.audit_trail=‘db‘ *.compatible=‘11.2.0.0.0‘ *.control_files=‘+DATA/orcl/controlfile/current.260.855531771‘,‘+FRA/orcl /controlfile/current.256.855531771‘ *.db_block_size=8192 *.db_create_file_dest=‘+DATA‘ *.db_domain=‘‘ *.db_name=‘orcl‘ *.db_recovery_file_dest=‘+FRA‘ *.db_recovery_file_dest_size=4070572032 *.diagnostic_dest=‘/u01/app/oracle‘ *.dispatchers=‘(PROTOCOL=TCP) (SERVICE=orclXDB)‘ *.memory_target=418381824 *.nls_language=‘SIMPLIFIED CHINESE‘ *.nls_territory=‘CHINA‘ *.open_cursors=300 *.processes=150 *.remote_login_passwordfile=‘EXCLUSIVE‘ *.undo_tablespace=‘UNDOTBS1‘
本文出自 “专注于Oracle性能调优” 博客，谢绝转载！
原文地址：http://5073392.blog.51cto.com/5063392/1574460
