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分类目录归档：Oracle ASM
ASM未正常启动,使用dd找回数据文件
本篇主要测试在ASM未启动状态下,如何找出找出文件文件对应的AU,并且通过dd还原出数据文件
参考文档:ASM的文件管理深入解析（内含开源的ASM文件挖掘研究版程序）
模拟测试数据
SQL> alter database datafile '+XIFENFEI/xff/datafile/xifenfei.268.781905429' resize 50M ;
Database altered.
SQL> alter database datafile '+XIFENFEI/xff/datafile/xifenfei.268.781905429' autoextend off;
Database altered.
SQL> select GROUP_NUMBER from V$ASM_DISKGROUP where NAME like '%XIFENFEI%';
GROUP_NUMBER
------------
2
SQL> select DISK_NUMBER,path from v$asm_disk where GROUP_NUMBER=2;
DISK_NUMBER PATH
----------- ---------------------------------------------
1 /dev/oracleasm/disks/VOL4
0 /dev/oracleasm/disks/VOL3
SQL> create table t_xifenfei tablespace xifenfei
2 as
3 select * from dba_objects;
Table created.
SQL> select count(*) from t_xifenfei;
COUNT(*)
----------
74537
kfed找出相关AU映射
------------------------------------------------------------------------------ 1号文件的第一个AU（0号盘2号AU）中，只能保存1至255号文件的。 从256号文件开始，AU的分布信息保存在1号文件第二个AU中，也就是（1号盘，64号AU）。 其中第一个块（0号块），对应256号文件。1号块对应257号文件，等等，依此类推。 ------------------------------------------------------------------------------ [grid@rac1 disks]$ kfed read /dev/oracleasm/disks/VOL3 aun=2 blkn=1|more kfffde[0].xptr.au: 2 ; 0x4a0: 0x00000002 kfffde[0].xptr.disk: 0 ; 0x4a4: 0x0000 kfffde[0].xptr.flags: 0 ; 0x4a6: L=0 E=0 D=0 S=0 kfffde[0].xptr.chk: 40 ; 0x4a7: 0x28 kfffde[1].xptr.au: 64 ; 0x4a8: 0x00000040 kfffde[1].xptr.disk: 1 ; 0x4ac: 0x0001 kfffde[1].xptr.flags: 0 ; 0x4ae: L=0 E=0 D=0 S=0 kfffde[1].xptr.chk: 107 ; 0x4af: 0x6b kfffde[2].xptr.au: 4294967295 ; 0x4b0: 0xffffffff kfffde[2].xptr.disk: 65535 ; 0x4b4: 0xffff kfffde[2].xptr.flags: 0 ; 0x4b6: L=0 E=0 D=0 S=0 kfffde[2].xptr.chk: 42 ; 0x4b7: 0x2a [grid@rac1 disks]$ kfed read /dev/oracleasm/disks/VOL4 aun=64 blkn=12|more kfffde[0].xptr.au: 681 ; 0x4a0: 0x000002a9 kfffde[0].xptr.disk: 0 ; 0x4a4: 0x0000 kfffde[0].xptr.flags: 0 ; 0x4a6: L=0 E=0 D=0 S=0 kfffde[0].xptr.chk: 129 ; 0x4a7: 0x81 kfffde[1].xptr.au: 1092 ; 0x4a8: 0x00000444 kfffde[1].xptr.disk: 1 ; 0x4ac: 0x0001 kfffde[1].xptr.flags: 0 ; 0x4ae: L=0 E=0 D=0 S=0 kfffde[1].xptr.chk: 107 ; 0x4af: 0x6b kfffde[2].xptr.au: 1093 ; 0x4b0: 0x00000445 kfffde[2].xptr.disk: 1 ; 0x4b4: 0x0001 kfffde[2].xptr.flags: 0 ; 0x4b6: L=0 E=0 D=0 S=0 kfffde[2].xptr.chk: 106 ; 0x4b7: 0x6a kfffde[3].xptr.au: 682 ; 0x4b8: 0x000002aa kfffde[3].xptr.disk: 0 ; 0x4bc: 0x0000 kfffde[3].xptr.flags: 0 ; 0x4be: L=0 E=0 D=0 S=0 kfffde[3].xptr.chk: 130 ; 0x4bf: 0x82 kfffde[4].xptr.au: 1094 ; 0x4c0: 0x00000446 kfffde[4].xptr.disk: 1 ; 0x4c4: 0x0001 kfffde[4].xptr.flags: 0 ; 0x4c6: L=0 E=0 D=0 S=0 kfffde[4].xptr.chk: 105 ; 0x4c7: 0x69 kfffde[5].xptr.au: 1095 ; 0x4c8: 0x00000447 kfffde[5].xptr.disk: 1 ; 0x4cc: 0x0001 kfffde[5].xptr.flags: 0 ; 0x4ce: L=0 E=0 D=0 S=0 kfffde[5].xptr.chk: 104 ; 0x4cf: 0x68 kfffde[6].xptr.au: 683 ; 0x4d0: 0x000002ab kfffde[6].xptr.disk: 0 ; 0x4d4: 0x0000 kfffde[6].xptr.flags: 0 ; 0x4d6: L=0 E=0 D=0 S=0 kfffde[6].xptr.chk: 131 ; 0x4d7: 0x83 kfffde[7].xptr.au: 1096 ; 0x4d8: 0x00000448 kfffde[7].xptr.disk: 1 ; 0x4dc: 0x0001 kfffde[7].xptr.flags: 0 ; 0x4de: L=0 E=0 D=0 S=0 kfffde[7].xptr.chk: 103 ; 0x4df: 0x67 kfffde[8].xptr.au: 684 ; 0x4e0: 0x000002ac kfffde[8].xptr.disk: 0 ; 0x4e4: 0x0000 kfffde[8].xptr.flags: 0 ; 0x4e6: L=0 E=0 D=0 S=0 kfffde[8].xptr.chk: 132 ; 0x4e7: 0x84 kfffde[9].xptr.au: 1097 ; 0x4e8: 0x00000449 kfffde[9].xptr.disk: 1 ; 0x4ec: 0x0001 kfffde[9].xptr.flags: 0 ; 0x4ee: L=0 E=0 D=0 S=0 kfffde[9].xptr.chk: 102 ; 0x4ef: 0x66 kfffde[10].xptr.au: 1098 ; 0x4f0: 0x0000044a kfffde[10].xptr.disk: 1 ; 0x4f4: 0x0001 kfffde[10].xptr.flags: 0 ; 0x4f6: L=0 E=0 D=0 S=0 kfffde[10].xptr.chk: 101 ; 0x4f7: 0x65 kfffde[11].xptr.au: 685 ; 0x4f8: 0x000002ad kfffde[11].xptr.disk: 0 ; 0x4fc: 0x0000 kfffde[11].xptr.flags: 0 ; 0x4fe: L=0 E=0 D=0 S=0 kfffde[11].xptr.chk: 133 ; 0x4ff: 0x85 kfffde[12].xptr.au: 1099 ; 0x500: 0x0000044b kfffde[12].xptr.disk: 1 ; 0x504: 0x0001 kfffde[12].xptr.flags: 0 ; 0x506: L=0 E=0 D=0 S=0 kfffde[12].xptr.chk: 100 ; 0x507: 0x64 kfffde[13].xptr.au: 686 ; 0x508: 0x000002ae kfffde[13].xptr.disk: 0 ; 0x50c: 0x0000 kfffde[13].xptr.flags: 0 ; 0x50e: L=0 E=0 D=0 S=0 kfffde[13].xptr.chk: 134 ; 0x50f: 0x86 kfffde[14].xptr.au: 1100 ; 0x510: 0x0000044c kfffde[14].xptr.disk: 1 ; 0x514: 0x0001 kfffde[14].xptr.flags: 0 ; 0x516: L=0 E=0 D=0 S=0 kfffde[14].xptr.chk: 99 ; 0x517: 0x63 kfffde[15].xptr.au: 1101 ; 0x518: 0x0000044d kfffde[15].xptr.disk: 1 ; 0x51c: 0x0001 kfffde[15].xptr.flags: 0 ; 0x51e: L=0 E=0 D=0 S=0 kfffde[15].xptr.chk: 98 ; 0x51f: 0x62 kfffde[16].xptr.au: 687 ; 0x520: 0x000002af kfffde[16].xptr.disk: 0 ; 0x524: 0x0000 kfffde[16].xptr.flags: 0 ; 0x526: L=0 E=0 D=0 S=0 kfffde[16].xptr.chk: 135 ; 0x527: 0x87 kfffde[17].xptr.au: 1102 ; 0x528: 0x0000044e kfffde[17].xptr.disk: 1 ; 0x52c: 0x0001 kfffde[17].xptr.flags: 0 ; 0x52e: L=0 E=0 D=0 S=0 kfffde[17].xptr.chk: 97 ; 0x52f: 0x61 kfffde[18].xptr.au: 1103 ; 0x530: 0x0000044f kfffde[18].xptr.disk: 1 ; 0x534: 0x0001 kfffde[18].xptr.flags: 0 ; 0x536: L=0 E=0 D=0 S=0 kfffde[18].xptr.chk: 96 ; 0x537: 0x60 kfffde[19].xptr.au: 688 ; 0x538: 0x000002b0 kfffde[19].xptr.disk: 0 ; 0x53c: 0x0000 kfffde[19].xptr.flags: 0 ; 0x53e: L=0 E=0 D=0 S=0 kfffde[19].xptr.chk: 152 ; 0x53f: 0x98 kfffde[20].xptr.au: 1104 ; 0x540: 0x00000450 kfffde[20].xptr.disk: 1 ; 0x544: 0x0001 kfffde[20].xptr.flags: 0 ; 0x546: L=0 E=0 D=0 S=0 kfffde[20].xptr.chk: 127 ; 0x547: 0x7f kfffde[21].xptr.au: 689 ; 0x548: 0x000002b1 kfffde[21].xptr.disk: 0 ; 0x54c: 0x0000 kfffde[21].xptr.flags: 0 ; 0x54e: L=0 E=0 D=0 S=0 kfffde[21].xptr.chk: 153 ; 0x54f: 0x99 kfffde[22].xptr.au: 1105 ; 0x550: 0x00000451 kfffde[22].xptr.disk: 1 ; 0x554: 0x0001 kfffde[22].xptr.flags: 0 ; 0x556: L=0 E=0 D=0 S=0 kfffde[22].xptr.chk: 126 ; 0x557: 0x7e kfffde[23].xptr.au: 1106 ; 0x558: 0x00000452 kfffde[23].xptr.disk: 1 ; 0x55c: 0x0001 kfffde[23].xptr.flags: 0 ; 0x55e: L=0 E=0 D=0 S=0 kfffde[23].xptr.chk: 125 ; 0x55f: 0x7d kfffde[24].xptr.au: 690 ; 0x560: 0x000002b2 kfffde[24].xptr.disk: 0 ; 0x564: 0x0000 kfffde[24].xptr.flags: 0 ; 0x566: L=0 E=0 D=0 S=0 kfffde[24].xptr.chk: 154 ; 0x567: 0x9a kfffde[25].xptr.au: 1107 ; 0x568: 0x00000453 kfffde[25].xptr.disk: 1 ; 0x56c: 0x0001 kfffde[25].xptr.flags: 0 ; 0x56e: L=0 E=0 D=0 S=0 kfffde[25].xptr.chk: 124 ; 0x56f: 0x7c kfffde[26].xptr.au: 691 ; 0x570: 0x000002b3 kfffde[26].xptr.disk: 0 ; 0x574: 0x0000 kfffde[26].xptr.flags: 0 ; 0x576: L=0 E=0 D=0 S=0 kfffde[26].xptr.chk: 155 ; 0x577: 0x9b kfffde[27].xptr.au: 1108 ; 0x578: 0x00000454 kfffde[27].xptr.disk: 1 ; 0x57c: 0x0001 kfffde[27].xptr.flags: 0 ; 0x57e: L=0 E=0 D=0 S=0 kfffde[27].xptr.chk: 123 ; 0x57f: 0x7b kfffde[28].xptr.au: 1109 ; 0x580: 0x00000455 kfffde[28].xptr.disk: 1 ; 0x584: 0x0001 kfffde[28].xptr.flags: 0 ; 0x586: L=0 E=0 D=0 S=0 kfffde[28].xptr.chk: 122 ; 0x587: 0x7a kfffde[29].xptr.au: 692 ; 0x588: 0x000002b4 kfffde[29].xptr.disk: 0 ; 0x58c: 0x0000 kfffde[29].xptr.flags: 0 ; 0x58e: L=0 E=0 D=0 S=0 kfffde[29].xptr.chk: 156 ; 0x58f: 0x9c kfffde[30].xptr.au: 1110 ; 0x590: 0x00000456 kfffde[30].xptr.disk: 1 ; 0x594: 0x0001 kfffde[30].xptr.flags: 0 ; 0x596: L=0 E=0 D=0 S=0 kfffde[30].xptr.chk: 121 ; 0x597: 0x79 kfffde[31].xptr.au: 1111 ; 0x598: 0x00000457 kfffde[31].xptr.disk: 1 ; 0x59c: 0x0001 kfffde[31].xptr.flags: 0 ; 0x59e: L=0 E=0 D=0 S=0 kfffde[31].xptr.chk: 120 ; 0x59f: 0x78 kfffde[32].xptr.au: 693 ; 0x5a0: 0x000002b5 kfffde[32].xptr.disk: 0 ; 0x5a4: 0x0000 kfffde[32].xptr.flags: 0 ; 0x5a6: L=0 E=0 D=0 S=0 kfffde[32].xptr.chk: 157 ; 0x5a7: 0x9d kfffde[33].xptr.au: 1112 ; 0x5a8: 0x00000458 kfffde[33].xptr.disk: 1 ; 0x5ac: 0x0001 kfffde[33].xptr.flags: 0 ; 0x5ae: L=0 E=0 D=0 S=0 kfffde[33].xptr.chk: 119 ; 0x5af: 0x77 kfffde[34].xptr.au: 694 ; 0x5b0: 0x000002b6 kfffde[34].xptr.disk: 0 ; 0x5b4: 0x0000 kfffde[34].xptr.flags: 0 ; 0x5b6: L=0 E=0 D=0 S=0 kfffde[34].xptr.chk: 158 ; 0x5b7: 0x9e kfffde[35].xptr.au: 1113 ; 0x5b8: 0x00000459 kfffde[35].xptr.disk: 1 ; 0x5bc: 0x0001 kfffde[35].xptr.flags: 0 ; 0x5be: L=0 E=0 D=0 S=0 kfffde[35].xptr.chk: 118 ; 0x5bf: 0x76 kfffde[36].xptr.au: 1114 ; 0x5c0: 0x0000045a kfffde[36].xptr.disk: 1 ; 0x5c4: 0x0001 kfffde[36].xptr.flags: 0 ; 0x5c6: L=0 E=0 D=0 S=0 kfffde[36].xptr.chk: 117 ; 0x5c7: 0x75 kfffde[37].xptr.au: 695 ; 0x5c8: 0x000002b7 kfffde[37].xptr.disk: 0 ; 0x5cc: 0x0000 kfffde[37].xptr.flags: 0 ; 0x5ce: L=0 E=0 D=0 S=0 kfffde[37].xptr.chk: 159 ; 0x5cf: 0x9f kfffde[38].xptr.au: 1115 ; 0x5d0: 0x0000045b kfffde[38].xptr.disk: 1 ; 0x5d4: 0x0001 kfffde[38].xptr.flags: 0 ; 0x5d6: L=0 E=0 D=0 S=0 kfffde[38].xptr.chk: 116 ; 0x5d7: 0x74 kfffde[39].xptr.au: 1116 ; 0x5d8: 0x0000045c kfffde[39].xptr.disk: 1 ; 0x5dc: 0x0001 kfffde[39].xptr.flags: 0 ; 0x5de: L=0 E=0 D=0 S=0 kfffde[39].xptr.chk: 115 ; 0x5df: 0x73 kfffde[40].xptr.au: 696 ; 0x5e0: 0x000002b8 kfffde[40].xptr.disk: 0 ; 0x5e4: 0x0000 kfffde[40].xptr.flags: 0 ; 0x5e6: L=0 E=0 D=0 S=0 kfffde[40].xptr.chk: 144 ; 0x5e7: 0x90 kfffde[41].xptr.au: 1117 ; 0x5e8: 0x0000045d kfffde[41].xptr.disk: 1 ; 0x5ec: 0x0001 kfffde[41].xptr.flags: 0 ; 0x5ee: L=0 E=0 D=0 S=0 kfffde[41].xptr.chk: 114 ; 0x5ef: 0x72 kfffde[42].xptr.au: 697 ; 0x5f0: 0x000002b9 kfffde[42].xptr.disk: 0 ; 0x5f4: 0x0000 kfffde[42].xptr.flags: 0 ; 0x5f6: L=0 E=0 D=0 S=0 kfffde[42].xptr.chk: 145 ; 0x5f7: 0x91 kfffde[43].xptr.au: 1118 ; 0x5f8: 0x0000045e kfffde[43].xptr.disk: 1 ; 0x5fc: 0x0001 kfffde[43].xptr.flags: 0 ; 0x5fe: L=0 E=0 D=0 S=0 kfffde[43].xptr.chk: 113 ; 0x5ff: 0x71 kfffde[44].xptr.au: 1119 ; 0x600: 0x0000045f kfffde[44].xptr.disk: 1 ; 0x604: 0x0001 kfffde[44].xptr.flags: 0 ; 0x606: L=0 E=0 D=0 S=0 kfffde[44].xptr.chk: 112 ; 0x607: 0x70 kfffde[45].xptr.au: 698 ; 0x608: 0x000002ba kfffde[45].xptr.disk: 0 ; 0x60c: 0x0000 kfffde[45].xptr.flags: 0 ; 0x60e: L=0 E=0 D=0 S=0 kfffde[45].xptr.chk: 146 ; 0x60f: 0x92 kfffde[46].xptr.au: 1120 ; 0x610: 0x00000460 kfffde[46].xptr.disk: 1 ; 0x614: 0x0001 kfffde[46].xptr.flags: 0 ; 0x616: L=0 E=0 D=0 S=0 kfffde[46].xptr.chk: 79 ; 0x617: 0x4f kfffde[47].xptr.au: 699 ; 0x618: 0x000002bb kfffde[47].xptr.disk: 0 ; 0x61c: 0x0000 kfffde[47].xptr.flags: 0 ; 0x61e: L=0 E=0 D=0 S=0 kfffde[47].xptr.chk: 147 ; 0x61f: 0x93 kfffde[48].xptr.au: 1121 ; 0x620: 0x00000461 kfffde[48].xptr.disk: 1 ; 0x624: 0x0001 kfffde[48].xptr.flags: 0 ; 0x626: L=0 E=0 D=0 S=0 kfffde[48].xptr.chk: 78 ; 0x627: 0x4e kfffde[49].xptr.au: 1122 ; 0x628: 0x00000462 kfffde[49].xptr.disk: 1 ; 0x62c: 0x0001 kfffde[49].xptr.flags: 0 ; 0x62e: L=0 E=0 D=0 S=0 kfffde[49].xptr.chk: 77 ; 0x62f: 0x4d kfffde[50].xptr.au: 700 ; 0x630: 0x000002bc kfffde[50].xptr.disk: 0 ; 0x634: 0x0000 kfffde[50].xptr.flags: 0 ; 0x636: L=0 E=0 D=0 S=0 kfffde[50].xptr.chk: 148 ; 0x637: 0x94 --到此截止 kfffde[51].xptr.au: 4294967295 ; 0x638: 0xffffffff kfffde[51].xptr.disk: 65535 ; 0x63c: 0xffff kfffde[51].xptr.flags: 0 ; 0x63e: L=0 E=0 D=0 S=0 kfffde[51].xptr.chk: 42 ; 0x63f: 0x2a
dd操作
[grid@rac1 disks]$ dd if=/dev/oracleasm/disks/VOL3 bs=1024k count=1 skip=681 seek=0 of=/tmp/xifenfei01.dbf 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0924808 seconds, 11.3 MB/s [grid@rac1 disks]$ dd if=/dev/oracleasm/disks/VOL4 bs=1024k count=1 skip=1092 seek=1 of=/tmp/xifenfei01.dbf 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.051765 seconds, 20.3 MB/s [grid@rac1 disks]$ dd if=/dev/oracleasm/disks/VOL4 bs=1024k count=1 skip=1093 seek=2 of=/tmp/xifenfei01.dbf 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0695681 seconds, 15.1 MB/s [grid@rac1 disks]$ dd if=/dev/oracleasm/disks/VOL3 bs=1024k count=1 skip=682 seek=3 of=/tmp/xifenfei01.dbf 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0516708 seconds, 20.3 MB/s …………类此处理………… [grid@rac1 disks]$ dd if=/dev/oracleasm/disks/VOL4 bs=1024k count=1 skip=1122 seek=49 of=/tmp/xifenfei01.dbf 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0699421 seconds, 15.0 MB/s [grid@rac1 disks]$ dd if=/dev/oracleasm/disks/VOL3 bs=1024k count=1 skip=700 seek=50 of=/tmp/xifenfei01.dbf 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0650649 seconds, 16.1 MB/s
修改所有者
[root@rac1 ~]# chown oracle.oinstall /tmp/xifenfei01.dbf [root@rac1 ~]# ll /tmp/xifenfei01.dbf -rw-r--r-- 1 oracle oinstall 53477376 Apr 30 12:57 /tmp/xifenfei01.dbf
dbv验证数据文件
[oracle@rac1 ~]$ dbv file='+XIFENFEI/xff/datafile/xifenfei.268.781905429' userid=sys/xifenfei DBVERIFY: Release 11.2.0.3.0 - Production on Mon Apr 30 12:53:32 2012 Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved. DBVERIFY - Verification starting : FILE = +XIFENFEI/xff/datafile/xifenfei.268.781905429 DBVERIFY - Verification complete Total Pages Examined : 6400 Total Pages Processed (Data) : 1066 Total Pages Failing (Data) : 0 Total Pages Processed (Index): 0 Total Pages Failing (Index): 0 Total Pages Processed (Other): 156 Total Pages Processed (Seg) : 0 Total Pages Failing (Seg) : 0 Total Pages Empty : 5178 Total Pages Marked Corrupt : 0 Total Pages Influx : 0 Total Pages Encrypted : 0 Highest block SCN : 0 (0.0) [oracle@rac1 ~]$ dbv file='/tmp/xifenfei01.dbf' DBVERIFY: Release 11.2.0.3.0 - Production on Mon Apr 30 12:53:50 2012 Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved. DBVERIFY - Verification starting : FILE = /tmp/xifenfei01.dbf DBVERIFY - Verification complete Total Pages Examined : 6400 Total Pages Processed (Data) : 1066 Total Pages Failing (Data) : 0 Total Pages Processed (Index): 0 Total Pages Failing (Index): 0 Total Pages Processed (Other): 156 Total Pages Processed (Seg) : 0 Total Pages Failing (Seg) : 0 Total Pages Empty : 5178 Total Pages Marked Corrupt : 0 Total Pages Influx : 0 Total Pages Encrypted : 0 Highest block SCN : 1039267 (0.1039267)
数据库验证数据文件
SQL> alter database datafile '+XIFENFEI/xff/datafile/xifenfei.268.781905429' offline;
Database altered.
SQL> alter database rename file '+XIFENFEI/xff/datafile/xifenfei.268.781905429'
2 to '/tmp/xifenfei01.dbf';
Database altered.
SQL> recover datafile '/tmp/xifenfei01.dbf';
Media recovery complete.
SQL> alter database datafile '/tmp/xifenfei01.dbf' online;
Database altered.
SQL> select count(*) from t_xifenfei;
COUNT(*)
----------
74537
发表在 Oracle ASM
6 条评论
bbed修改ASM中数据
本篇文章演示了如何从ASM中通过dd拷贝出某种表的记录,然后通过bbed修改相关记录,再拷贝到库中.说的简单点就是通过dd拷贝出最少的需要对象数据块,然后通过bbed绕过数据库级别对相关记录进行修改
模拟测试数据
--ORACLE数据库中执行
SQL> create tablespace xifenfei datafile '+xifenfei' size 30M autoextend on maxsize 10G;
Tablespace created.
SQL> create table t_xifenfei (id number,name varchar2(10)) tablespace xifenfei;
Table created.
SQL> insert into t_xifenfei values(1,'xifenfei');
1 row created.
SQL> insert into t_xifenfei values(2,'XFF');
1 row created.
SQL> SELECT * FROM T_XIFENFEI;
ID NAME
---------- ----------
1 xifenfei
2 XFF
SQL> commit;
Commit complete.
SQL> select EXTENT_ID, BLOCK_ID, BLOCKS, FILE_ID from dba_extents
2 where SEGMENT_NAME='T_XIFENFEI' and OWNER='SYS';
EXTENT_ID BLOCK_ID BLOCKS FILE_ID
---------- ---------- ---------- ----------
0 128 8 6
SQL> select name from v$datafile where file#=6;
NAME
----------------------------------------------------
+XIFENFEI/xff/datafile/xifenfei.268.781905429
SQL> select GROUP_NUMBER from V$ASM_DISKGROUP where NAME like '%XIFENFEI%';
GROUP_NUMBER
------------
2
在ASM用户中查询相关数据
--ASM中执行
SQL> SELECT disk_kffxp, au_kffxp, xnum_kffxp
2 FROM x$kffxp
3 WHERE GROUP_KFFXP=2
4 AND NUMBER_KFFXP=268;
DISK_KFFXP AU_KFFXP XNUM_KFFXP
---------- ---------- ----------
0 681 0
1 1092 1
1 1093 2
0 682 3
1 1094 4
1 1095 5
0 683 6
1 1096 7
0 684 8
1 1097 9
1 1098 10
DISK_KFFXP AU_KFFXP XNUM_KFFXP
---------- ---------- ----------
0 685 11
1 1099 12
0 686 13
1 1100 14
1 1101 15
0 687 16
1 1102 17
1 1103 18
0 688 19
1 1104 20
0 689 21
DISK_KFFXP AU_KFFXP XNUM_KFFXP
---------- ---------- ----------
1 1105 22
1 1106 23
0 690 24
1 1107 25
0 691 26
1 1108 27
1 1109 28
0 692 29
1 1110 30
31 rows selected.
--数据文件6的AU分配情况
SQL> select 128*8/1024 from dual;
128*8/1024
----------
1
SQL> select 8*8/1024 from dual;
8*8/1024
----------
.0625
--可以得出该表T_XIFENFEI的数据分布在第二块AU中(DISK_KFFXP=1/AU_KFFXP=1092/XNUM_KFFXP=1)
SQL> select name, path from v$asm_disk where group_number=2
2 and disk_number=1;
NAME PATH
------------------------------ --------------------------
XIFENFEI_0001 /dev/oracleasm/disks/VOL4
找出对应磁盘或者分区
[grid@rac1 ~]$ /etc/init.d/oracleasm querydisk -d VOL4 Disk "VOL4" is a valid ASM disk on device [8,18] [grid@rac1 ~]$ cat /proc/partitions |grep "8 18" 8 18 3879697 sdb2
因为这里的block_id=128,刚好是下一个AU的起点,所以dd操作的起点是第二个AU(DISK_KFFXP=1/AU_KFFXP=1092),而终点是8*8=64K(第二个AU中offset 64KB)
执行dd导出表数据
of=/dev/sdb2 sb=1K skip=1092*1024=1118208 count=64 [root@rac1 ~]# dd if=/dev/sdb2 bs=1k count=64 skip=1118208|strings 64+0 records in 64+0 records out 65536 bytes (66 kB) copied, 0.000656471 seconds, 99.8 MB/s XFF, xifenfei [root@rac1 ~]# dd if=/dev/sdb2 bs=1k count=64 skip=1118208 of=/tmp/t_xifenfe.tab 64+0 records in 64+0 records out 65536 bytes (66 kB) copied, 0.00226337 seconds, 29.0 MB/s [root@rac1 ~]# chown oracle.oinstall /tmp/t_xifenfe.tab [root@rac1 ~]# ll /tmp/t_xifenfe.tab -rw-r--r-- 1 oracle oinstall 65536 Apr 29 21:54 /tmp/t_xifenfe.tab
bbed 修改数据内容
[oracle@rac1 ~]$ bbed
Password:
BBED: Release 2.0.0.0.0 - Limited Production on Sun Apr 29 22:43:56 2012
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
************* !!! For Oracle Internal Use only !!! ***************
BBED> set filename '/tmp/t_xifenfe.tab'
FILENAME /tmp/t_xifenfe.tab
BBED> set block 4
BLOCK# 4
BBED> set mode edit
MODE Edit
BBED> set blocksize 8192
BLOCKSIZE 8192
BBED> map
File: /tmp/t_xifenfe.tab (0)
Block: 4 Dba:0x00000000
------------------------------------------------------------
KTB Data Block (Table/Cluster)
struct kcbh, 20 bytes @0
struct ktbbh, 72 bytes @20
struct kdbh, 14 bytes @100
struct kdbt[1], 4 bytes @114
sb2 kdbr[2] @118
ub1 freespace[8041] @122
ub1 rowdata[25] @8163
ub4 tailchk @8188
BBED> p kdbr
sb2 kdbr[0] @118 8073
sb2 kdbr[1] @120 8063
BBED> find /c XFF
File: /tmp/t_xifenfe.tab (0)
Block: 4 Offsets: 8170 to 8191 Dba:0x00000000
------------------------------------------------------------------------
5846462c 010202c1 02087869 66656e66 65690106 ba33
<32 bytes per line>
BBED> dump /v
File: /tmp/t_xifenfe.tab (0)
Block: 4 Offsets: 8170 to 8191 Dba:0x00000000
-------------------------------------------------------
5846462c 010202c1 02087869 66656e66 l XFF,......xifenf
65690106 ba33 l ei...3
<16 bytes per line>
BBED> m /c xff
File: /tmp/t_xifenfe.tab (0)
Block: 4 Offsets: 8170 to 8191 Dba:0x00000000
------------------------------------------------------------------------
7866662c 010202c1 02087869 66656e66 65690106 ba33
<32 bytes per line>
BBED> dump /v
File: /tmp/t_xifenfe.tab (0)
Block: 4 Offsets: 8170 to 8191 Dba:0x00000000
-------------------------------------------------------
7866662c 010202c1 02087869 66656e66 l xff,......xifenf
65690106 ba33 l ei...3
<16 bytes per line>
BBED> find /c xifenfei
File: /tmp/t_xifenfe.tab (0)
Block: 4 Offsets: 8180 to 8191 Dba:0x00000000
------------------------------------------------------------------------
78696665 6e666569 0106ba33
<32 bytes per line>
BBED> dump /v
File: /tmp/t_xifenfe.tab (0)
Block: 4 Offsets: 8180 to 8191 Dba:0x00000000
-------------------------------------------------------
78696665 6e666569 0106ba33 l xifenfei...3
<16 bytes per line>
BBED> m /c XIFENFEI
File: /tmp/t_xifenfe.tab (0)
Block: 4 Offsets: 8180 to 8191 Dba:0x00000000
------------------------------------------------------------------------
58494645 4e464549 0106ba33
<32 bytes per line>
BBED> dump /v
File: /tmp/t_xifenfe.tab (0)
Block: 4 Offsets: 8180 to 8191 Dba:0x00000000
-------------------------------------------------------
58494645 4e464549 0106ba33 l XIFENFEI...3
<16 bytes per line>
BBED> sum
Check value for File 0, Block 4:
current = 0xd332, required = 0xf332
BBED> sum apply
Check value for File 0, Block 4:
current = 0xf332, required = 0xf332
BBED> set offset 8073
OFFSET 8073
BBED> dump /v
File: /tmp/t_xifenfe.tab (0)
Block: 4 Offsets: 8073 to 8191 Dba:0x00000000
-------------------------------------------------------
00000000 00000000 00000000 00000000 l ................
00000000 00000000 00000000 00000000 l ................
00000000 00000000 00000000 00000000 l ................
00000000 00000000 00000000 00000000 l ................
00000000 00000000 00000000 00000000 l ................
00000000 00000000 00002c01 0202c103 l ..........,.....
03786666 2c010202 c1020858 4946454e l .xff,......XIFEN
46454901 06ba33 l FEI...3
<16 bytes per line>
BBED> exit
dd导入修改后数据验证
--会话1关闭数据库
[oracle@rac1 ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.3.0 Production on Sun Apr 29 22:48:51 2012
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
--会话2导入bbed修改后数据
[root@rac1 ~]# dd of=/dev/sdb2 bs=1k count=64 seek=1118208 if=/tmp/t_xifenfe.tab
64+0 records in
64+0 records out
65536 bytes (66 kB) copied, 0.0014908 seconds, 44.0 MB/s
--会话1启动数据库库查询
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options
[oracle@rac1 ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.3.0 Production on Sun Apr 29 22:51:00 2012
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup
ORACLE instance started.
Total System Global Area 535662592 bytes
Fixed Size 1346140 bytes
Variable Size 411043236 bytes
Database Buffers 117440512 bytes
Redo Buffers 5832704 bytes
Database mounted.
Database opened.
SQL> select * from t_xifenfei;
ID NAME
---------- ----------
1 XIFENFEI
2 xff
使用dd复制asm中文件
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,这是asm深入学习第一篇,参考:dd复制ASM中的datafile
查询ASM某个数据文件AU信息
SQL> SELECT GROUP_NUMBER, FILE_NUMBER, NAME
2 FROM v$asm_alias
3 WHERE NAME LIKE '%USER%'
4 GROUP BY GROUP_NUMBER, FILE_NUMBER, NAME;
GROUP_NUMBER FILE_NUMBER NAME
------------ ----------- -----------------------------
2 259 USERS.259.776961317
SQL> SELECT disk_kffxp, au_kffxp, xnum_kffxp
2 FROM x$kffxp
3 WHERE GROUP_KFFXP=2
4 AND NUMBER_KFFXP=259;
DISK_KFFXP AU_KFFXP XNUM_KFFXP
---------- ---------- ----------
1 817 0
0 507 1
1 818 2
0 508 3
1 819 4
1 820 5
SQL> select DISK_NUMBER,GROUP_NUMBER,PATH from v$asm_disk
2 where GROUP_NUMBER=2 and DISK_NUMBER in(1,0);
DISK_NUMBER GROUP_NUMBER PATH
----------- ------------ -----------------------------------
1 2 /dev/oracleasm/disks/VOL4
0 2 /dev/oracleasm/disks/VOL3
查询ASM DISK对应的磁盘或者分区
[grid@rac1 ~]$ /etc/init.d/oracleasm querydisk -d VOL3 Disk "VOL3" is a valid ASM disk on device [8,17] [grid@rac1 ~]$ /etc/init.d/oracleasm querydisk -d VOL4 Disk "VOL4" is a valid ASM disk on device [8,18] [grid@rac1 ~]$ cat /proc/partitions |grep "8 17" 8 17 2409718 sdb1 [grid@rac1 ~]$ cat /proc/partitions |grep "8 18" 8 18 3879697 sdb2
dd操作磁盘或者分区
[root@rac1 ~]# dd if=/dev/sdb2 bs=1024k count=1 skip=817 of=/tmp/user_1.dbf 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.188362 seconds, 5.6 MB/s [root@rac1 ~]# dd if=/dev/sdb1 bs=1024k count=1 skip=507 of=/tmp/user_2.dbf 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.259001 seconds, 4.0 MB/s [root@rac1 ~]# dd if=/dev/sdb2 bs=1024k count=1 skip=818 of=/tmp/user_3.dbf 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.182559 seconds, 5.7 MB/s [root@rac1 ~]# dd if=/dev/sdb1 bs=1024k count=1 skip=508 of=/tmp/user_4.dbf 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.10011 seconds, 10.5 MB/s [root@rac1 ~]# dd if=/dev/sdb2 bs=1024k count=2 skip=819 of=/tmp/user_5.dbf 2+0 records in 2+0 records out 2097152 bytes (2.1 MB) copied, 0.22389 seconds, 9.4 MB/s [root@rac1 ~]# ll /tmp/user_* -rw-r--r-- 1 root root 1048576 Apr 29 18:50 /tmp/user_1.dbf -rw-r--r-- 1 root root 1048576 Apr 29 18:51 /tmp/user_2.dbf -rw-r--r-- 1 root root 1048576 Apr 29 18:51 /tmp/user_3.dbf -rw-r--r-- 1 root root 1048576 Apr 29 18:51 /tmp/user_4.dbf -rw-r--r-- 1 root root 2097152 Apr 29 18:51 /tmp/user_5.dbf [root@rac1 ~]# dd if=/tmp/user_1.dbf bs=1024k count=1 of=/tmp/user_dd.dbf 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0104619 seconds, 100 MB/s [root@rac1 ~]# dd if=/tmp/user_2.dbf bs=1024k count=1 seek=1 of=/tmp/user_dd.dbf 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0129077 seconds, 81.2 MB/s [root@rac1 ~]# dd if=/tmp/user_3.dbf bs=1024k count=1 seek=2 of=/tmp/user_dd.dbf 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.00737324 seconds, 142 MB/s [root@rac1 ~]# dd if=/tmp/user_4.dbf bs=1024k count=1 seek=3 of=/tmp/user_dd.dbf 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0143482 seconds, 73.1 MB/s [root@rac1 ~]# dd if=/tmp/user_5.dbf bs=1024k count=2 seek=4 of=/tmp/user_dd.dbf 2+0 records in 2+0 records out 2097152 bytes (2.1 MB) copied, 0.0809296 seconds, 25.9 MB/s [root@rac1 ~]# ll /tmp/user_* -rw-r--r-- 1 root root 1048576 Apr 29 18:50 /tmp/user_1.dbf -rw-r--r-- 1 root root 1048576 Apr 29 18:51 /tmp/user_2.dbf -rw-r--r-- 1 root root 1048576 Apr 29 18:51 /tmp/user_3.dbf -rw-r--r-- 1 root root 1048576 Apr 29 18:51 /tmp/user_4.dbf -rw-r--r-- 1 root root 2097152 Apr 29 18:51 /tmp/user_5.dbf -rw-r--r-- 1 root root 5242880 Apr 29 18:54 /tmp/user_dd.dbf [root@rac1 ~]# chown oracle.oinstall /tmp/user_dd.dbf [root@rac1 ~]# ll /tmp/user_* -rw-r--r-- 1 root root 1048576 Apr 29 18:50 /tmp/user_1.dbf -rw-r--r-- 1 root root 1048576 Apr 29 18:51 /tmp/user_2.dbf -rw-r--r-- 1 root root 1048576 Apr 29 18:51 /tmp/user_3.dbf -rw-r--r-- 1 root root 1048576 Apr 29 18:51 /tmp/user_4.dbf -rw-r--r-- 1 root root 2097152 Apr 29 18:51 /tmp/user_5.dbf -rw-r--r-- 1 oracle oinstall 6291456 Apr 29 18:55 /tmp/user_dd.dbf
验证dd拷贝数据文件
[oracle@rac1 ~]$ dbv file='/tmp/user_dd.dbf' DBVERIFY: Release 11.2.0.3.0 - Production on Sun Apr 29 18:56:31 2012 Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved. DBVERIFY - Verification starting : FILE = /tmp/user_dd.dbf DBVERIFY - Verification complete Total Pages Examined : 640 Total Pages Processed (Data) : 15 Total Pages Failing (Data) : 0 Total Pages Processed (Index): 2 Total Pages Failing (Index): 0 Total Pages Processed (Other): 590 Total Pages Processed (Seg) : 0 Total Pages Failing (Seg) : 0 Total Pages Empty : 33 Total Pages Marked Corrupt : 0 Total Pages Influx : 0 Total Pages Encrypted : 0 Highest block SCN : 782778 (0.782778) [oracle@rac1 ~]$ dbv userid=sys/xifenfei file='+XIFENFEI/xff/datafile/users.259.776961317' > blocksize=8192 DBVERIFY: Release 11.2.0.3.0 - Production on Sun Apr 29 18:58:13 2012 Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved. DBVERIFY - Verification starting : FILE = +XIFENFEI/xff/datafile/users.259.776961317 DBVERIFY - Verification complete Total Pages Examined : 640 Total Pages Processed (Data) : 15 Total Pages Failing (Data) : 0 Total Pages Processed (Index): 2 Total Pages Failing (Index): 0 Total Pages Processed (Other): 590 Total Pages Processed (Seg) : 0 Total Pages Failing (Seg) : 0 Total Pages Empty : 33 Total Pages Marked Corrupt : 0 Total Pages Influx : 0 Total Pages Encrypted : 0 Highest block SCN : 0 (0.0)
发表在 Oracle ASM
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