Re: ASM -- Is it Mirrored Stripes or Striped Mirrors

ASM does neither - its mirroring algorithm is unique. You can read about ASM redundancy here:
http://www.oracle.com/technology/products/database/asm/pdf/asm_10gr2_bptwp_sept05.pdf

Doug.

Jagjeet Singh wrote:
> Hi,
>
> I am trying to understand about ASM striping and mirroring mechanism.
>
> As It is confirm that I does both the things but I want to know whether
> it does 1+0 or 0+1
>
> like First it does mirroring and then striping or striping and then
> mirroring.
>
> Like If I create a normal redundancy diskgroup using
>
> create diskgroup dg normal redundancy
> failgroup f1 disk 'disk1','disk2'
> failgroup f2 disk 'disk3,disk4';
>
> And as per RAID 1+0
>
> DG
> |
> F1 --------------------------------------F2
> | |
> Disk1, Disk2 Disk3,Disk4
>
> And suppose 2 blocks [ b1 and b2 ] are occupied or get extended in
> this diskgroup then would it be speeded like
>
>
> DG
> |
> F1 ----------------------------------------- F2
> | |
> Disk1, Disk2 Disk3,Disk4
>
> b1 b1 b2 .b2
>
>
> or
>
> DG
> |
> F1 ----------------------------------------- F2
> | |
> Disk1, Disk2 Disk3,Disk4
>
> b1 b2 b1 .b2
>
>
> Regards,
> Jagjeet Singh
Received on Thu Dec 07 2006 - 19:59:21 CST