Re: Larry Ellison comments on Microsoft's benchmark

You can cross mount disks with shared nothing (also called drive mapping). Only one node owns the disk at any time. If the owner node fails, the mutual takeover node gets the IP of the failing node, and takes over the disk. Send me your e-mail if you want a white paper on doing this in the Solaris environment with DB2. You can also read about it in Chapter 34 of our Administration Guide: http://www.ibm.com/cgi-bin/db2www/data/db2/udb/winos2unix/support/document.d2w/report?fn=db2v7d0frm3toc.htm

See the section "Registering Database Drive Mapping for Mutual Takeover Configurations in a Partitioned Database Environment".

Does the 135461 Oracle result on Solaris use OPS?

Ivana Humpalot wrote:

> "Blair Kenneth Adamache" <adamache_at_ca.ibm.com> wrote:
> >
> > Mutual takeover uses machines doing other work to back each other
> > up. After a failure, performance goes down (11 machines are doing
> > work intended for 12 machines).
>
> This is not possible, to the best of my knowledge. "Shared nothing"
> means disk is not shared either. Each machine has its own disk and
> a portion of the database. If a machine dies the disk and the data
> on it become inaccessible, and you're screwed.
>
> If I am wrong, please supply technical details of how this is
> possible. I am willing to be educated.
Received on Thu Jul 06 2000 - 00:00:00 CDT