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6 Replies Latest reply: Jan 10, 2013 2:27 PM by onedbguru RSS

Asm extents

user3266490 Newbie
Currently Being Moderated
Hi,

Db :10.1

Some confusion between ASM extent and RSBMS extent?

What is ASM extent?How it's map with RDBMS extent?
What is allocation unit?



Thanks & Regards,
VN
  • 1. Re: Asm extents
    sb92075 Guru
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    Handle:     user3266490
    Status Level:     Newbie (25)
    Registered:     Nov 26, 2008
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  • 2. Re: Asm extents
    vlethakula Expert
    Currently Being Moderated
    An ASM extent consists of one or more allocation units. An ASM file consists of one or more ASM extents.
  • 3. Re: Asm extents
    user3266490 Newbie
    Currently Being Moderated
    Hi,

    Thanks for your reply.

    Please tell what is usage of asm extent and allocation unit.
    why it's needed.

    Thanks & Regards,
    VN
  • 4. Re: Asm extents
    vlethakula Expert
    Currently Being Moderated
    check for diagramatic description (Extents)

    http://docs.oracle.com/cd/B28359_01/server.111/b31107/asmcon.htm
  • 5. Re: Asm extents
    user3266490 Newbie
    Currently Being Moderated
    Hi,

    Thanks for your reply.

    Both questions(asm extents are differ,i think.The subject name is same in both question.

    Anyhow,Please clear my doubts.

    For Ex:

    In 1gb hard disk, au size is 1 mb we have 1024 allocation unit in that disk.Is it correct?
    In what basis, How many allocation units is allocated to an asm extents.
    And
    In what basis, How many asm extents to allocated to an asm file

    Really i am unable to understand it.

    Thanks & Regards,
    VN

    Edited by: user3266490 on Jan 10, 2013 11:51 PM
  • 6. Re: Asm extents
    onedbguru Pro
    Currently Being Moderated
    Rather than asking the same question over and over again, how about reading the plethora of posts, books and documentation on the subject. There is a great book that would serve this purpose and is more comprehensive than you can get here...

    http://www.lmgtfy.com/?q=oracle+automatic+storage+management+under+the+hood

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