Oracle ASM AMDU工具的使用

abstractcyj 發表於 2019-08-09

      Oracle 10g中, ASM磁碟組的資訊需要在Mount之後才能通過內部檢視查詢, 如果磁碟組因為故障無法正常載入,那麼資訊將不可用, 這為ASM相關故障的診斷帶來了諸多不便

      Oracle在11g中提供了AMDU, 可用於協助診斷,在ASM磁碟載入前,可以將ASM後設資料從磁碟中抽取出來,用於資料庫診斷。此工具可以向後相容,引入到10g。


      使用方法:

[[email protected] ~]$ amdu -diskstring '/dev/asmdisk*'

amdu_2019_08_09_11_04_26/

[[email protected] ~]$ cd amdu_2019_08_09_11_04_26/

[[email protected] amdu_2019_08_09_11_04_26]$ ls -l

total 8

-rw-r--r-- 1 grid oinstall 5367 Aug  9 11:04 report.txt

[[email protected] amdu_2019_08_09_11_04_26]$ more report.txt 

-*-amdu-*-


******************************* AMDU Settings ********************************

ORACLE_HOME = /u01/app/11.2.0/grid

System name: Linux

Node name: dbhost01

Release: 3.10.0-862.el7.x86_64

Version: #1 SMP Wed Mar 21 18:14:51 EDT 2018

Machine: x86_64

amdu run: 09-AUG-19 11:04:26

Endianess: 1

抽取整個資料庫檔案的流程如下:

1. 在告警日誌中定位控制檔案在ASM檔案系統中的編號

Starting up:

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With the Partitioning, Real Application Clusters, OLAP, Data Mining

and Real Application Testing options.

ORACLE_HOME = /u01/app/oracle/product/11.2.0/db_1

System name: Linux

Node name: dbhost01

Release: 3.10.0-862.el7.x86_64

Version: #1 SMP Wed Mar 21 18:14:51 EDT 2018

Machine: x86_64

VM name: VMWare Version: 6

Using parameter settings in server-side pfile /u01/app/oracle/product/11.2.0/db_1/dbs/initorcl1.ora

System parameters with non-default values:

  processes                = 150

  spfile                   = "+DATA/orcl/spfileorcl.ora"

  memory_target            = 1584M

  control_files            = " +DATA/orcl/controlfile/current.260.1008261229 "

  db_block_size            = 8192

  compatible               = "11.2.0.4.0"

  cluster_database         = TRUE

  db_create_file_dest      = "+DATA"

  thread                   = 1

  undo_tablespace          = "UNDOTBS1"

  instance_number          = 1

  remote_login_passwordfile= "EXCLUSIVE"

  db_domain                = ""

  dispatchers              = "(PROTOCOL=TCP) (SERVICE=orclXDB)"

  remote_listener          = "myrac-cluster-scan:1521"

  audit_file_dest          = "/u01/app/oracle/admin/orcl/adump"

  audit_trail              = "DB"

  db_name                  = "orcl"

  open_cursors             = 300

  diagnostic_dest          = "/u01/app/oracle"


2. 抽取控制檔案

   

[[email protected] amdu_2019_08_09_11_04_26]$ amdu -extract +DATA.260

AMDU-00108: file name invalid [+DATA.260]

[[email protected] amdu_2019_08_09_11_04_26]$ amdu -extract DATA.260

amdu_2019_08_09_14_20_11/

AMDU-00210: No disks found in diskgroup DATA

AMDU-00210: No disks found in diskgroup DATA

[[email protected] amdu_2019_08_09_11_04_26]$ amdu -diskstring "/dev/asmdisk*" -extract DATA.260

amdu_2019_08_09_14_20_42/

[[email protected] amdu_2019_08_09_11_04_26]$ ls -l amdu_2019_08_09_14_20_42

total 18072

-rw-r--r-- 1 grid oinstall 18497536 Aug  9 14:20 DATA_260.f

-rw-r--r-- 1 grid oinstall     7306 Aug  9 14:20 report.txt

[[email protected] amdu_2019_08_09_11_04_26]$ 

[[email protected] amdu_2019_08_09_11_04_26]$ 

[[email protected] amdu_2019_08_09_11_04_26]$


3. 從控制檔案中獲取資料檔案,日誌等資訊

   

[[email protected] amdu_2019_08_09_14_20_42]$ strings DATA_260.f | grep +DATA > DATAFILE_ORCL.txt

[[email protected] amdu_2019_08_09_14_20_42]$ 

[[email protected] amdu_2019_08_09_14_20_42]$ ls -l 

total 18076

-rw-r--r-- 1 grid oinstall 18497536 Aug  9 14:20 DATA_260.f

-rw-r--r-- 1 grid oinstall      987 Aug  9 14:23 DATAFILE_ORCL.txt

-rw-r--r-- 1 grid oinstall     7306 Aug  9 14:20 report.txt

[[email protected] amdu_2019_08_09_14_20_42]$ more DATAFILE_ORCL.txt 

+DATA/orcl/onlinelog/group_2.262.1008261231

+DATA/orcl/onlinelog/group_1.261.1008261231


4.  按照第三步的輸出,抽取出日誌檔案,資料檔案等等


amdu -diskstring "/dev/asmdisk*" -extract DATA.259

amdu -diskstring "/dev/asmdisk*" -extract DATA.258

amdu -diskstring "/dev/asmdisk*" -extract DATA.257

amdu -diskstring "/dev/asmdisk*" -extract DATA.256

amdu -diskstring "/dev/asmdisk*" -extract DATA.263

amdu -diskstring "/dev/asmdisk*" -extract DATA.264

amdu -diskstring "/dev/asmdisk*" -extract DATA.265

amdu -diskstring "/dev/asmdisk*" -extract DATA.266

amdu -diskstring "/dev/asmdisk*" -extract DATA.267

amdu -diskstring "/dev/asmdisk*" -extract DATA.262

amdu -diskstring "/dev/asmdisk*" -extract DATA.261


5.  新建例項,利用抽取的控制檔案,啟動至mount

    並使用alter database rename file改名等啟動資料庫



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