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)

 

 

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