- 03 Sep, 2023
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- 1 Min Read
Useful Asmcmd Commands
This blog contains the list of useful asmcmd commands which are important in your day to day operations.
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List all diskgroups:
1 2 3 4 5 6 7 8 9 10 | ASMCMD> lsdg-- Include dismounted diskgroups:ASMCMD> lsdg --discovery-- List diskgroups across all nodes of cluster:ASMCMD> lsdg -g --discovery |
2. List asm disks:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | a.List all asm disksASMCMD> lsdsk -k b. List disks of a diskgroup(CDATA) with free and total MBASMCMD> lsdsk -k -G CDATA c. List disks of a diskgroup(CDATA) with group and disk numberASMCMD> lsdsk -p -G CDATA d. List disks with disk creation dateASMCMD> lsdsk -t -G CDATA e. List candidiate disks onlyASMCMD> lsdsk --candidate -k f. List member disks onlyASMCMD> lsdsk --candidate -p |
3. Get attributes of ASM diskgroups:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | a. List attribute of all diskgroups:ASMCMD> lsattr -lm b. List attribute of specific diskgroup(DMARCH)ASMCMD> lsattr -lm -G DMARCHGroup_Name Name Value RO SysDMARCH access_control.enabled FALSE N YDMARCH access_control.umask 066 N YDMARCH au_size 1048576 Y YDMARCH cell.smart_scan_capable FALSE N Nc. List attributes with specific patternASMCMD> lsattr -lm %au_size% |
4. Unmount diskgroup:
unmount command works only on the local node. So if you want to unmount the diskgroup from all nodes of cluster, then run this command from all the nodes.1 2 3 4 5 | a. unmount all diskgroupsASMCMD> umount -ab. unmount specific diskgroup(ARCH)ASMCMD> umount ARCH |
5. Mount diskgroup:
Mount command works only on the local node. So if you want to Mount the diskgroup from all nodes of cluster, then run this command from all the nodes.
1 2 3 4 5 | a. mount all diskgroups on local nodeASMCMD> mount -ab. mount a specific diskgroup on local nodeASMCMD> mount ARCH |
6. Rebalance a diskgroup:
1 2 3 4 5 6 7 8 | a. here asm_power_limit is 8 and diskgroup is ARCHASMCMD> rebal --power 8 ARCHRebal on progress.b. Monitor progressASMCMD> lsop |
7. Get password file of database
1 | ASMCMD> pwget --dbuniquename PRIM |
8. Get password file of asm :
1 | ASMCMD> pwget --asm |
9. Get asm template info of a diskgroup:
1 | ASMCMD> lstmpl -l -G ARCH |
10. Check whether flex asm is enabled or not :
1 | ASMCMD> showclustermode |