Re: [suse-oracle] Flash and ASM

Thanks Peter,

I had a look at Chapter 10 and it gives some valuable information about
ASM metadata ( Allocation and Partnership Status table)

D>

On Fri, 2009-07-31 at 15:38 +0200, Peter Schinagl wrote:

> Hi Damien,
> 
> maybe this link helps a bit
>  http://jarneil.wordpress.com/2008/01/02/book-review-oracle-automatic-storage-management/
> 
> On Fri, Jul 31, 2009 at 09:24:00AM -0400, Damien Pinault wrote:
> > Hello all,
> > 
> > I would like to know where I could find some good links ( or
> > documentation) about "How ASM works internally".
> > I am especially interested about knowing how ASM maintains consistency
> > across multiple disks ( file hearers, time stamp, journaling , etc .. ).
> > 
> > We have :
> > * Oracle instances on ASM ( All active components reside on 1 VG :
> > +DATA )
> > * +DATA VG is based on multiple disks ( between 4 and 10 depending on
> > the guest )
> > * We flash the running instance with an hardware (IBM DS8100) or
> > software ( LVM snapshots) solution without any consistency groups
> > defined for the ASM disks.
> >    The operation is really quick ( < 1 second ) and basically flashes
> > the disks 1 by 1.
> > * Database is in backup mode during the flash (alter database begin/end
> > backup;)
> > 
> > ASM and DB seems to be in consistent mode every time when we start them
> > both on the flashed system.
> > I can understand the DB part but not really the ASM one. so is this just
> > luck ?
> > 
> > Thanks in advance,
> > 
> > D>
> 
> > _______________________________________________
> > suse-oracle mailing list
> > [email protected]
> > http://listx.novell.com/mailman/listinfo/suse-oracle
> 
>

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