ASM Storage Concept - ASM DiskGroup - ASM Disks - Allocation Units (AU) - ASM Files - Extend Mgmt
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- čas přidán 12. 09. 2020
- 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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Excellent explanation with asm concepts mallikarjun sir. Thankyou very much
Keep watching
great job - you are very fluent in this thing, thanks.
You are welcome
Very good Explanation .
great explanation
thank you 4 clarification
You are welcome
BEST EXPLANATION
Good session sir
Thank you
good explanation sir
Thanks and welcome
Hi, your videos are nice and easily understanding. Also can you make some videos on oracle golden gate
Sure I will take some sessions on GG but not right now.
I will plan it in future days.
just a question
what will happen suppose if there is diskgroup DEF with following disk sizes :
disk1 : 1gb
disk2 : 2gb
disk3 : 3gb
plz reply
Sir what happens if I add a 1g datafile with respect to stripping and mirroring?
Kemey