From 13c9edd44a0325bf40fb579f61a45f695d7d54ba Mon Sep 17 00:00:00 2001 From: darksun Date: Mon, 20 May 2019 13:00:49 +0800 Subject: [PATCH] =?UTF-8?q?=E9=80=89=E9=A2=98:=2020190520=20How=20To=20Map?= =?UTF-8?q?=20Oracle=20ASM=20Disk=20Against=20Physical=20Disk=20And=20LUNs?= =?UTF-8?q?=20In=20Linux=3F=20sources/tech/20190520=20How=20To=20Map=20Ora?= =?UTF-8?q?cle=20ASM=20Disk=20Against=20Physical=20Disk=20And=20LUNs=20In?= =?UTF-8?q?=20Linux.md?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- ...Against Physical Disk And LUNs In Linux.md | 229 ++++++++++++++++++ 1 file changed, 229 insertions(+) create mode 100644 sources/tech/20190520 How To Map Oracle ASM Disk Against Physical Disk And LUNs In Linux.md diff --git a/sources/tech/20190520 How To Map Oracle ASM Disk Against Physical Disk And LUNs In Linux.md b/sources/tech/20190520 How To Map Oracle ASM Disk Against Physical Disk And LUNs In Linux.md new file mode 100644 index 0000000000..4e9df8a0ff --- /dev/null +++ b/sources/tech/20190520 How To Map Oracle ASM Disk Against Physical Disk And LUNs In Linux.md @@ -0,0 +1,229 @@ +[#]: collector: (lujun9972) +[#]: translator: ( ) +[#]: reviewer: ( ) +[#]: publisher: ( ) +[#]: url: ( ) +[#]: subject: (How To Map Oracle ASM Disk Against Physical Disk And LUNs In Linux?) +[#]: via: (https://www.2daygeek.com/shell-script-map-oracle-asm-disks-physical-disk-lun-in-linux/) +[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/) + +How To Map Oracle ASM Disk Against Physical Disk And LUNs In Linux? +====== + +You might already know about ASM, Device Mapper Multipathing (DM-Multipathing) if you are working quit long time as a Linux administrator. + +There are multiple ways to check these information. However, you will be getting part of the information when you use the default commands. + +It doesn’t show you all together in the single output. + +If you want to check all together in the single output then we need to write a small shell script to achieve this. + +We have added two shell script to get those information and you can use which one is suitable for you. + +Major and Minor numbers can be used to match the physical devices in Linux system. + +This tutorial helps you to find which ASM disk maps to which Linux partition or DM Device. + +If you want to **[manage Oracle ASM disks][1]** (such as start, enable, stop, list, query and etc) then navigate to following URL. + +### What Is ASMLib? + +ASMLib is an optional support library for the Automatic Storage Management feature of the Oracle Database. + +Automatic Storage Management (ASM) simplifies database administration and greatly reduces kernel resource usage (e.g. the number of open file descriptors). + +It eliminates the need for the DBA to directly manage potentially thousands of Oracle database files, requiring only the management of groups of disks allocated to the Oracle Database. + +ASMLib allows an Oracle Database using ASM more efficient and capable access to the disk groups it is using. + +### What Is Device Mapper Multipathing (DM-Multipathing)? + +Device Mapper Multipathing or DM-multipathing is a Linux host-side native multipath tool, which allows us to configure multiple I/O paths between server nodes and storage arrays into a single device by utilizing device-mapper. + +### Method-1 : Shell Script To Map ASM Disks To Physical Devices? + +In this shell script we are using for loop to achieve the results. + +Also, we are not using any ASM related commands. + +``` +# vi asm_disk_mapping.sh + +#!/bin/bash + +ls -lh /dev/oracleasm/disks > /tmp/asmdisks1.txt + +for ASMdisk in `cat /tmp/asmdisks1.txt | tail -n +2 | awk '{print $10}'` + +do + +minor=$(grep -i "$ASMdisk" /tmp/asmdisks1.txt | awk '{print $6}') + +major=$(grep -i "$ASMdisk" /tmp/asmdisks1.txt | awk '{print $5}' | cut -d"," -f1) + +phy_disk=$(ls -l /dev/* | grep ^b | grep "$major, *$minor" | awk '{print $10}') + +echo "ASM disk $ASMdisk is associated on $phy_disk [$major, $minor]" + +done +``` + +Set an executable permission to port_scan.sh file. + +``` +$ chmod +x asm_disk_mapping.sh +``` + +Finally run the script to achieve this. + +``` +# sh asm_disk_mapping.sh + +ASM disk MP4E6D_DATA01 is associated on /dev/dm-1 +3600a0123456789012345567890234q11 [253, 1] +ASM disk MP4E6E_DATA02 is associated on /dev/dm-2 +3600a0123456789012345567890234q12 [253, 2] +ASM disk MP4E6F_DATA03 is associated on /dev/dm-3 +3600a0123456789012345567890234q13 [253, 3] +ASM disk MP4E70_DATA04 is associated on /dev/dm-4 +3600a0123456789012345567890234q14 [253, 4] +ASM disk MP4E71_DATA05 is associated on /dev/dm-5 +3600a0123456789012345567890234q15 [253, 5] +ASM disk MP4E72_DATA06 is associated on /dev/dm-6 +3600a0123456789012345567890234q16 [253, 6] +ASM disk MP4E73_DATA07 is associated on /dev/dm-7 +3600a0123456789012345567890234q17 [253, 7] +``` + +### Method-2 : Shell Script To Map ASM Disks To Physical Devices? + +In this shell script we are using while loop to achieve the results. + +Also, we are using ASM related commands. + +``` +# vi asm_disk_mapping_1.sh + +#!/bin/bash + +/etc/init.d/oracleasm listdisks > /tmp/asmdisks.txt + +while read -r ASM_disk + +do + +major="$(/etc/init.d/oracleasm querydisk -d $ASM_disk | awk -F[ '{ print $2 }'| awk -F] '{ print $1 }' | cut -d"," -f1)" + +minor="$(/etc/init.d/oracleasm querydisk -d $ASM_disk | awk -F[ '{ print $2 }'| awk -F] '{ print $1 }' | cut -d"," -f2)" + +phy_disk="$(ls -l /dev/* | grep ^b | grep "$major, *$minor" | awk '{ print $10 }')" + +echo "ASM disk $ASM_disk is associated on $phy_disk [$major, $minor]" + +done < /tmp/asmdisks.txt +``` + +Set an executable permission to port_scan.sh file. + +``` +$ chmod +x asm_disk_mapping_1.sh +``` + +Finally run the script to achieve this. + +``` +# sh asm_disk_mapping_1.sh + +ASM disk MP4E6D_DATA01 is associated on /dev/dm-1 +3600a0123456789012345567890234q11 [253, 1] +ASM disk MP4E6E_DATA02 is associated on /dev/dm-2 +3600a0123456789012345567890234q12 [253, 2] +ASM disk MP4E6F_DATA03 is associated on /dev/dm-3 +3600a0123456789012345567890234q13 [253, 3] +ASM disk MP4E70_DATA04 is associated on /dev/dm-4 +3600a0123456789012345567890234q14 [253, 4] +ASM disk MP4E71_DATA05 is associated on /dev/dm-5 +3600a0123456789012345567890234q15 [253, 5] +ASM disk MP4E72_DATA06 is associated on /dev/dm-6 +3600a0123456789012345567890234q16 [253, 6] +ASM disk MP4E73_DATA07 is associated on /dev/dm-7 +3600a0123456789012345567890234q17 [253, 7] +``` + +### How To List Oracle ASM Disks? + +If you would like to list only Oracle ASM disk then use the below command to List available/created Oracle ASM disks in Linux. + +``` +# oracleasm listdisks + +ASM_Disk1 +ASM_Disk2 +ASM_Disk3 +ASM_Disk4 +ASM_Disk5 +ASM_Disk6 +ASM_Disk7 +``` + +### How To List Oracle ASM Disks Against Major And Minor Number? + +If you would like to map Oracle ASM disks against major and minor number then use the below commands to List available/created Oracle ASM disks in Linux. + +``` +# for ASMdisk in `oracleasm listdisks`; do /etc/init.d/oracleasm querydisk -d $ASMdisk; done + +Disk "ASM_Disk1" is a valid Disk on device [253, 1] +Disk "ASM_Disk2" is a valid Disk on device [253, 2] +Disk "ASM_Disk3" is a valid Disk on device [253, 3] +Disk "ASM_Disk4" is a valid Disk on device [253, 4] +Disk "ASM_Disk5" is a valid Disk on device [253, 5] +Disk "ASM_Disk6" is a valid Disk on device [253, 6] +Disk "ASM_Disk7" is a valid Disk on device [253, 7] +``` + +Alternatively, we can get the same results using the ls command. + +``` +# ls -lh /dev/oracleasm/disks + +total 0 +brw-rw---- 1 oracle oinstall 253, 1 May 19 14:44 ASM_Disk1 +brw-rw---- 1 oracle oinstall 253, 2 May 19 14:44 ASM_Disk2 +brw-rw---- 1 oracle oinstall 253, 3 May 19 14:44 ASM_Disk3 +brw-rw---- 1 oracle oinstall 253, 4 May 19 14:44 ASM_Disk4 +brw-rw---- 1 oracle oinstall 253, 5 May 19 14:44 ASM_Disk5 +brw-rw---- 1 oracle oinstall 253, 6 May 19 14:44 ASM_Disk6 +brw-rw---- 1 oracle oinstall 253, 7 May 19 14:44 ASM_Disk7 +``` + +### How To List Physical Disks Against LUNs? + +If you would like to map physical disks against LUNs then use the below command. + +``` +# multipath -ll | grep NETAPP + +3600a0123456789012345567890234q11 dm-1 NETAPP,LUN C-Mode +3600a0123456789012345567890234q12 dm-2 NETAPP,LUN C-Mode +3600a0123456789012345567890234q13 dm-3 NETAPP,LUN C-Mode +3600a0123456789012345567890234q14 dm-4 NETAPP,LUN C-Mode +3600a0123456789012345567890234q15 dm-5 NETAPP,LUN C-Mode +3600a0123456789012345567890234q16 dm-6 NETAPP,LUN C-Mode +3600a0123456789012345567890234q17 dm-7 NETAPP,LUN C-Mode +``` + +-------------------------------------------------------------------------------- + +via: https://www.2daygeek.com/shell-script-map-oracle-asm-disks-physical-disk-lun-in-linux/ + +作者：[Magesh Maruthamuthu][a] +选题：[lujun9972][b] +译者：[译者ID](https://github.com/译者ID) +校对：[校对者ID](https://github.com/校对者ID) + +本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出 + +[a]: https://www.2daygeek.com/author/magesh/ +[b]: https://github.com/lujun9972 +[1]: https://www.2daygeek.com/start-stop-restart-enable-reload-oracleasm-service-linux-create-scan-list-query-rename-delete-configure-oracleasm-disk/