11gR2 中asm 实例的spfile文件的默认存储位置
本文参考自：
ASM spfile in a disk group (文档 ID 1668455.1)
一、确认asm diskgroup：注意看是Normal冗余级别，AU是1048576
[grid@rhel63single ~]$ asmcmd ASMCMD> lsdg State Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name MOUNTED NORMAL N 512 4096 1048576 6141 6019 2047 1986 0 N DATA/ ASMCMD> exit [grid@rhel63single ~]$
二、spfile的位置
[grid@rhel63single ~]$ sqlplus / as sysasm SQL*Plus: Release 11.2.0.4.0 Production on Sun Jan 10 17:49:33 2016 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production With the Automatic Storage Management option SQL> show parameter pfile NAME TYPE VALUE ---------------- ----------- ------------------------------ spfile string +DATA/asm/asmparameterfile/registry.253.890702019 SQL> exit Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production With the Automatic Storage Management option [grid@rhel63single ~]$
注意：可以看到asm的spfile存储在+data磁盘组中，而+data磁盘组是Normal冗余级别的，因此，一共有两个spfile，并且是互为镜像关系。
三、检查asm 的spfile的位置：
[grid@rhel63single peer]$ for disk in `asmcmd lsdsk -G DATA --suppressheader` > do > echo $disk > kfed read $disk | grep spf > done /dev/raw/raw1 kfdhdb.spfile: 4 ; 0x0f4: 0x00000004 --->十进制数字4代表存放spfile的AU Number kfdhdb.spfflg: 1 ; 0x0f8: 0x00000001 --->十进制数字1代表该asm disk中存放了spfile /dev/raw/raw2 kfdhdb.spfile: 59 ; 0x0f4: 0x0000003b --->十进制数字59代表存放spfile的AU Number kfdhdb.spfflg: 1 ; 0x0f8: 0x00000001 --->十进制数字1代表该asm disk中存放了spfile /dev/raw/raw3 kfdhdb.spfile: 0 ; 0x0f4: 0x00000000 kfdhdb.spfflg: 0 ; 0x0f8: 0x00000000 [grid@rhel63single peer]$
四、根据上一步信息确认asm 的spfile内容：
[grid@rhel63single peer]$ dd if=/dev/raw/raw1 bs=1048576 skip=4 count=1 | strings *.asm_power_limit=1 *.diagnostic_dest='/u03/app/grid' *.instance_type='asm' *.large_pool_size=12M *.remote_login_passwordfile='EXCLUSIVE' 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0493577 s, 21.2 MB/s [grid@rhel63single peer]$
[grid@rhel63single peer]$ dd if=/dev/raw/raw2 bs=1048576 skip=59 count=1 | strings *.asm_power_limit=1 *.diagnostic_dest='/u03/app/grid' *.instance_type='asm' *.large_pool_size=12M *.remote_login_passwordfile='EXCLUSIVE' 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0491052 s, 21.4 MB/s [grid@rhel63single peer]$
四、查看asm spfile的alias信息：
[grid@rhel63single peer]$ kfed read /dev/raw/raw1 aun=4 blkn=255 kfbh.endian: 1 ; 0x000: 0x01 kfbh.hard: 130 ; 0x001: 0x82 kfbh.type: 27 ; 0x002: KFBTYP_ASMSPFALS kfbh.datfmt: 1 ; 0x003: 0x01 kfbh.block.blk: 255 ; 0x004: blk=255 kfbh.block.obj: 253 ; 0x008: file=253 kfbh.check: 873236675 ; 0x00c: 0x340c88c3 kfbh.fcn.base: 0 ; 0x010: 0x00000000 kfbh.fcn.wrap: 0 ; 0x014: 0x00000000 kfbh.spare1: 0 ; 0x018: 0x00000000 kfbh.spare2: 0 ; 0x01c: 0x00000000 kfspbals.incarn: 890702019 ; 0x000: 0x351708c3 kfspbals.blksz: 512 ; 0x004: 0x00000200 kfspbals.size: 3 ; 0x008: 0x0003 kfspbals.path.len: 0 ; 0x00a: 0x0000 --------->十进制数字0表示没有alias kfspbals.path.buf: ; 0x00c: length=0 [grid@rhel63single peer]$