Oracle ASM benefits & Advantages - What is Dynamic Rebalancing - ASM Tools (asmca, kfod, asmcmd)

ASM Benefits:
Reduced administration complexity
Simplified daily administration
Automatic I/O tuning for all loads
Generation of meaningful file names
Reduced number of objects to manage(via disk groups)
Simplified configuration changes
Reduced downtime
Reduced storage product costs
Volume manager no longer needed
Stripes files rather than logical volumes
Enables online disk reconfiguration and dynamic rebalancing
Provides adjustable rebalancing speed
Provides redundancy on a file basis
Supports only Oracle files
Is cluster aware
Is automatically installed as part of the base code set
ASM Tools:
Installation
asmtool/asmtoolg (Windows)
asmtool (Linux + asmlib)
oracleasm (Linux + asmlib)
Administration
asmcmd (10gR2)
Debugging
kfod
kfed
ocrcheck
#ASM #asmca #asmcmd #kfod #kfed #RAC #HAS #CRS #Oracle #Database #Exadata
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Mallikarjun Ramadurg
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[@sohailahmedsyed9351]

What a Session. Superb Sir. No one can beat our Indian Tutors. Superb Job, explained in a very clear and easy to understand language. Thank You so much

[@Mallik034]

You are welcome

[@BHARARHROYAL]

Good session and clystar clear explanation. Please make one video of asm logs and asm instance hung situations. Thanks sir

[@Mallik034]

Noted. Sure I will do it in next session

[@suniljagtap622]

Very Nice

[@ankurkumargarg6305]

Hi Mallik, many thanks for sharing valuable knowledge with us.
There is a question.
For an ASM diskgroup with external redundancy , if someone dropped the diskgroup from the ASM , what will be the impact on ASM and Database services?

[@ankurkumargarg6305]

If there is any performance issue in Oracle RAC server , and application team asked us to stop the rebalancing on the disks , what will be the right steps to improve the performance?
Will downtime required for changing the rebalance power for asm disks?

[@devangsangani7580]

After adding one disk to ASM existing diskgroup bcz of space crunches..my one node rebooted automatically. So where to check what exactly happened during disk add

[@Mallik034]

Ideally disk addition is online activity it should not cause node reboot.
check you cluster logs and ASM alert logs and nodes logs and also OS logs to verify the cause of server reboot.

[@Farhan640]

Good session, but that click volume is annoying. Please try to avoid that.

[@devangsangani7580]

For dynamic rebalance we require normal or higher redundancy right ? If i am using external redundancy and one of my disk is corrupted then how can we recover?

[@Mallik034]

For dynamic rebalance we require normal or higher redundancy right ?
>>>> Yes you are correct
If i am using external redundancy and one of my disk is corrupted then how can we recover?
>>> If you are using the external redundancy, one disk drop may leads to cluster/ASM crash.
>>> if you are using the external redundancy or external Hardware level redundancy then ASM will not crash

[@belowasmelashgebremariam]

Kemey