ASM文件管理amdu/dd

ASM文件管理手札之----AMDU/DD

                随着数据库新版本的推广ASM肯定会越来越被重视,最近准备系统的学习下ASM,以备突发情况需要。在11g里未出来之前，能做的很有限，想要copyASM里一个文件出来，只有用DD和exec dbms_file_transfer.copy_file（）,如果块坏了，那只能用DD找到对应的文件DD出来，再做BBED分析。在11G里出了AMDU,这个可以使用在10G上。下面了解下其用法，并和DD对比，起一个抛砖的作用。

AMDU是oracle 11g自带的一款asm文件抽取工具,也可以给oracle 10g用，用法参见oracle metalink 553639.1：

下载下来：

unzip amdu_X86-64.zip

export LD_LIBRARY_PATH=./

抽取spfile

文本框: SQL />select name,file_number,alias_index,file_incarnation from v$asm_alias where name like '%spfile%'; NAME FILE_NUMBER ALIAS_INDEX FILE_INCARNATION spfile.266.866828907 266 477 866828907 spfiledb.ora 266 227 866828907 [grid@mysql-1]$ amdu -diskstring '/dev/raw/raw*' -extract data.266 [grid@mysql-1]$ strings DATA_266.f db1.__db_cache_size=134217728 db2.__db_cache_size=146800640 db1.__java_pool_size=4194304 db2.__java_pool_size=4194304 db1.__large_pool_size=8388608 db2.__large_pool_size=8388608 db2.__oracle_base='/opt/oracle' #ORACLE_BASE set from environment ………….. 文本框: SQL /> SELECT a.GROUP_KFFXP, a.DISK_KFFXP, a.AU_KFFXP, b.path,c.name FROM x$kffxp a, v$asm_disk b, v$asm_alias c WHERE a.number_kffxp = c.file_number AND a.GROUP_KFFXP = b.group_number AND a.disk_kffxp = b.disk_number AND b.group_number=1 AND c.name LIKE '%spfile%'; GROUP_KFFXP DISK_KFFXP AU_KFFXP PATH NAME 1 0 208 /dev/raw/raw4 spfiledb.ora 1 0 208 /dev/raw/raw4 spfile.266.866828907 文本框: SQL />select name,block_size,allocation_unit_size,state,type from v$asm_diskgroup; NAME BLOCK_SIZE ALLOCATION_UNIT_SIZE STATE TYPE DATA 4096 4194304 CONNECTED EXTERN ARCH 4096 0 DISMOUNTED 文本框: $dd if=/dev/raw/raw4 bs=4096 count=1 skip=212992 of=spfile.ora 文本框: [grid@mysql-1 ~]$ strings spfile.ora db1.__db_cache_size=134217728 db2.__db_cache_size=150994944 ………………………………………………………. db1.thread=1 db2.thread=4 db1.undo_tablespace='UNDOTBS1' db2.undo_tablespace='UNDOTBS4' 文本框: SQL />select file#,name,bytes/1024/1024 from v$datafile where name like '%users%'; FILE# NAME BYTES/1024/1024 4 +DATA/db/users01.dbf 2728.75 5 +DATA/db/datafile/users.274.896306467 100 #amdu -diskstring '/dev/raw/raw*' -extract data.274 #cat report.txt ************************** EXTRACTING FILE DATA.274 ************************** Creating file: DATA_274.f Extraction wrote: 104865792 bytes Stripe size: 4194304 bytes Stripe columns: 1 Mirror copies: 1 Block size: 8192 bytes File size: 12801 blocks File type: 2 Extent size #1: 4294967295 extents of 1 AUs Extent size #2: 0 extents of 1 AUs Extent size #3: 0 extents of 1 AUs Extent size #4: 4294967295 extents of 1 AUs Creation time: 2015/11/20 22:01:07.797000 Modified time: 2015/12/18 20:00:00.000000 Data extents in file: 26 Data extents found: 26 Blocks not found: 0 blocks 文本框: SQL />select 'dd if='||b.path||' bs=4194304 count=1 skip='||au_kffxp||' of=users_'||XNUM_KFFXP||'.dbf' FROM x$kffxp a, v$asm_disk b, v$asm_alias c WHERE a.number_kffxp = c.file_number AND a.GROUP_KFFXP = b.group_number AND a.disk_kffxp = b.disk_number AND b.group_number=1 AND c.name LIKE '%USERS.274%' order by XNUM_KFFXP dd if=/dev/raw/raw4 bs=4194304 count=1 skip=392 of=users_0.dbf dd if=/dev/raw/raw2 bs=4194304 count=1 skip=571 of=users_1.dbf dd if=/dev/raw/raw3 bs=4194304 count=1 skip=384 of=users_2.dbf dd if=/dev/raw/raw4 bs=4194304 count=1 skip=393 of=users_3.dbf dd if=/dev/raw/raw2 bs=4194304 count=1 skip=572 of=users_4.dbf dd if=/dev/raw/raw3 bs=4194304 count=1 skip=385 of=users_5.dbf dd if=/dev/raw/raw2 bs=4194304 count=1 skip=573 of=users_6.dbf dd if=/dev/raw/raw4 bs=4194304 count=1 skip=394 of=users_7.dbf dd if=/dev/raw/raw2 bs=4194304 count=1 skip=574 of=users_8.dbf dd if=/dev/raw/raw3 bs=4194304 count=1 skip=386 of=users_9.dbf dd if=/dev/raw/raw2 bs=4194304 count=1 skip=575 of=users_10.dbf dd if=/dev/raw/raw4 bs=4194304 count=1 skip=395 of=users_11.dbf dd if=/dev/raw/raw3 bs=4194304 count=1 skip=387 of=users_12.dbf dd if=/dev/raw/raw2 bs=4194304 count=1 skip=704 of=users_13.dbf dd if=/dev/raw/raw4 bs=4194304 count=1 skip=396 of=users_14.dbf dd if=/dev/raw/raw2 bs=4194304 count=1 skip=705 of=users_15.dbf dd if=/dev/raw/raw3 bs=4194304 count=1 skip=388 of=users_16.dbf dd if=/dev/raw/raw2 bs=4194304 count=1 skip=706 of=users_17.dbf dd if=/dev/raw/raw4 bs=4194304 count=1 skip=397 of=users_18.dbf dd if=/dev/raw/raw3 bs=4194304 count=1 skip=389 of=users_19.dbf dd if=/dev/raw/raw2 bs=4194304 count=1 skip=707 of=users_20.dbf dd if=/dev/raw/raw4 bs=4194304 count=1 skip=398 of=users_21.dbf dd if=/dev/raw/raw2 bs=4194304 count=1 skip=708 of=users_22.dbf dd if=/dev/raw/raw3 bs=4194304 count=1 skip=390 of=users_23.dbf dd if=/dev/raw/raw2 bs=4194304 count=1 skip=709 of=users_24.dbf dd if=/dev/raw/raw4 bs=4194304 count=1 skip=399 of=users_25.dbf

posted on 2015-12-21 16:00 snowhill 阅读(145) 评论(0)  编辑 收藏 引用 所属分类: 数据库-oracle


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