Hi, Gary.
Using a shared DCSS, along with some sort of signaling mechanism (IUCV?)
between the server and clients, should work. But be aware that the
maximum size of a DCSS is 2GB, which isn't all that large for file
systems these days.
Note that in z/VM 5.4, a DCSS can live above the 31 bit bar, but it is
still limited to the 2GB size.
Hope this helps.
Gary M. Dennis wrote:
As it is written. Guests pull from the server on read requests and
servers pull from the guests on write requests.
We seem to be missing an interrupt sequence don’t we?
Gary
On 4/3/09 6:15 PM, "Jeff Savit" <jsa...@gmail.com> wrote:
Do you mean 'pull' or 'poll' on read, or 'push' on write? :-)
In any case, Alan is right, and the lowest latency way for virtual
machin
es
to share data is with a DCSS.
cheers, Jeff
On Fri, 3 Apr 2009 16:47:58 -0500, Gary M. Dennis
<gary.den...@mantissa.c
om>
wrote:
>Something along these lines
>
>Guests pull on read
>Servers pull on write
>Async only
>
>
>--. .- .-. -.--
>
>Gary Dennis
>Mantissa
>
>0 ... living between the zeroes ... 0
>
>On 4/3/09 4:26 PM, "Alan Altmark" <alan_altm...@us.ibm.com> wrote:
>
> > On Friday, 04/03/2009 at 03:38 EDT, "Gary M. Dennis"
> > <gary.den...@mantissa.com> wrote:
> >> What I was trying to determine if there was a way to use ZFS on
> > OpenSolaris
> >> System z as a high speed space management vehicle while bypassing
> > conventional
> >> transport layers? For example, let?s say there existed a way to
push
> > data to
> >> the IO appliance cross-memory (guest to ZFZ, ZFS to guest) such
that
an
> >
> >> interface in the appliance could act as a local proxy for each guest
> > using the
> >> service.
> >
> > Just in case you are trying to connect Diag 0x248 with "push data" to
> > OpenSolaris, don't bother. First, Diag 0x248 is a read-only
function.
> > Second, OpenSolaris, like Linux, is DAT ON. That means they
cannot cr
eate
> > or access Data Spaces. Your only shared-memory solution is a DCSS.
> >
> > Alan Altmark
> > z/VM Development
> > IBM Endicott
> >
>========================
=========================
========================
--
Dave Jones
V/Soft
www.vsoft-software.com
Houston, TX
281.578.7544
