Oracle commonly used ASM operation commands

In the Oracle RAC environment, use the grid account to execute

Run asmcmd to enter asm command mode, such as:

[grid@oradb-node1 ~]$ asmcmd

ASMCMD> 

 

ASMCMD> du //Display all disk space occupied by ASM files in the specified ASM directory

ASMCMD> ls -ls //List the contents of the ASM directory and its attributes, disk space occupation

ASMCMD> pwd //View the current path

ASMCMD> cd ../DATA //Switch directory 

ASMCMD> lsct //List the information of the current ASM client

ASMCMD> lsdg //List all diskgroups and their attributes

ASMCMD> lsof //List data file information

ASMCMD> lsdsk//List disk information

ASMCMD> rm -f *.dbf //delete all current files with extension .dbf

ASMCMD> rm -fr orcldemo //delete the current orcldemo directory

 

The root path of ASM disk is "+", not "/", the following is the demonstration operation:

ASMCMD> cd datadg/demo

ASMCMD> pwd

+datadg/demo //The current path is +datadg/gd

ASMCMD> cd + //Switch to ASM disk root path

ASMCMD> pwd

+ //The current path is the root path +

 

You can also operate without entering the ASM command mode, such as:

[grid@oradb-node1 ~]$ asmcmd ls -ls //View ASM disk usage

 

To use the graphical interface, you can use the ASM helper command: asmca

[grid@oradb-node1 ~]$ sqlplus / as sysasm

 

--View disk group information

SQL> select name,state,type,total_mb ,free_mb from v$asm_diskgroup;

 

--View disk information

SQL> select group_number,path,state,total_mb,free_mb from v$asm_disk;

 

--View disk I/O information, datadg is the disk group name

[grid@oradb-node1 ~]$ asmcmd lsdsk --statistics -G datadg

Or briefly display reads and writes, including ASM disk list

[grid@oradb-node1 ~]$ asmcmd iostat -G datadg

 

Add the ASM disk disk08_test to the ASM disk group datadg, and the disk path is ORCL:DATA3_TEST

(This disk name needs to be established at the operating system level /etc/init.d/oracleasm createdisk DATA3_TEST /dev/mapper/mpathx)

SQL> alter diskgroup datadg add disk 'ORCL:DATA3_TEST' name disk08_test;

 

Delete ASM disk disk08_test from ASM disk group datadg

SQL> alter diskgroup datadg drop disk disk08_test;