ASM Storage Concept - ASM DiskGroup - ASM Disks - Allocation Units (AU) - ASM Files - Extend Mgmt

ASM Storage Concept - ASM DiskGroup - ASM Disks - Allocation Units (AU) - ASM Files - Extend Mgmt
AU:
ASM disks are divided into allocation units
Unit of allocating storage to a file
One megabyte in size
Small enough not to be hot
Large enough for efficient sequential access
Many allocation units in a single file
ASM disk block mapping
AU = 1MB
blocksize = 4k
Note:
50 MB space reservation for 255 ASM files.
ASM File:
datafile (segments, extents - these are logical obj.)
- ASM file (asmfile extents)
- AUs on disk
EXTENT MAP: Extents per file
ALLOCATION TABLE: AUs per disk
#ASM #DiskGroup #ASMDisks #AU #ASMFiles #ASMStorageConcept #RAC #Oracle #Database #Exadata
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Mallikarjun Ramadurg
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[@sagarreddy4768]

Excellent explanation with asm concepts mallikarjun sir. Thankyou very much

[@Mallik034]

Keep watching

[@ztech4634]

great job - you are very fluent in this thing, thanks.

[@Mallik034]

You are welcome

[@ManojYadav-lw8tu]

Very good Explanation .

[@adilibrahim5927]

BEST EXPLANATION

[@rehantayyab82]

great explanation

[@BHARARHROYAL]

Good session sir

[@Mallik034]

Thank you

[@educatech-datavisualisatio6330]

thank you 4 clarification

[@Mallik034]

You are welcome

[@tejarednam7896]

good explanation sir

[@Mallik034]

Thanks and welcome

[@rehantayyab82]

just a question
what will happen suppose if there is diskgroup DEF with following disk sizes :
disk1 : 1gb
disk2 : 2gb
disk3 : 3gb
plz reply

[@good123g]

Sir what happens if I add a 1g datafile with respect to stripping and mirroring?

[@rajeshkunda6704]

Hi, your videos are nice and easily understanding. Also can you make some videos on oracle golden gate

[@Mallik034]

Sure I will take some sessions on GG but not right now.
I will plan it in future days.

[@belowasmelashgebremariam]

Kemey