Re: Paging file

["John Earl" <john.earl@xxxxxxxxxxxxxxxxxx>]

Right before he retired, I heard John Sears tell the WMCPA group at the
Abbey that if he had it to do all over again he would like to have seen
OS/400 use a Hierarchical File System rather than Single Level Store.  His
reason at the time was not security, it was that SLS made it too hard for
OS/400 to play in the SAN and NFS world.  How do you share disks across an
array of machines if one or more of those machines thinks that all of that
disk is part of it's main memory?

An interesting thought.

jte



--
John Earl - CTO
The Powertech Group Inc. Seattle, Washington
www.powertechgroup.com  john.earl@powertechgroup.com

Phone: +1-253-872-7788
Fax:      +1-253-872-7904
--
----- Original Message -----
From: "Don" <dr2@cssas400.com>
To: <midrange-l@midrange.com>
Sent: Monday, October 28, 2002 8:21 PM
Subject: Re: Paging file


>
>
> TOOOOOOO bad the AIX, linux and Windows boys haven't picked up on Single
> Level Storeage yet....
>
>
>
> On Tue, 29 Oct 2002, Mark Waterbury wrote:
>
> > Hello, all:
> >
> > If you want to "understand" the single-level storage concepts of
> > the S/38 and AS/400, I recommend you get a copy of the book:
> > "Inside the AS/400" by Frank Soltis, 29th Street Press, or the newer
> > edition "Fortress Rochester".  I prefer "Inside the AS/400" 2nd Ed.,
> > to the newer "Fortress Rochester" because it has more details on
> > some subjects.
> >
> > Regards,
> >
> > Mark S. Waterbury
> >
> > ----- Original Message -----
> > From: "Booth Martin" <Booth@MartinVT.com>
> > To: <midrange-l@midrange.com>
> > Sent: Monday, October 28, 2002 8:10 PM
> > Subject: Re: Paging file
> >
> >
> > >
> > >
> > > please...  more discussion on this, more explanation.
> > >
> > > Love the concept, love the results, haven't figured it out though.
> > >
> > >
> > >
> > > ---------------------------------------------------------
> > > Booth Martin   http://www.MartinVT.com
> > > Booth@MartinVT.com
> > > ---------------------------------------------------------
> > >
> > > -------Original Message-------
> > >
> > > From: midrange-l@midrange.com
> > > Date: Monday, October 28, 2002 09:20:30 PM
> > > To: midrange-l@midrange.com
> > > Subject: Re: Paging file
> > >
> > > Troy
> > >
> > > A significant result of Single Level Store compared with something
like
> > > a PC Paging File is that an Object is given one set of Virtual
Addresses
> > > for
> > > it's life(longer) when it is created.
> > >
> > > This means that two different processes "branch" to the same address
for
> > an
> > > object inherently. Inherent Object Code sharing.
> > >
> > > Turn power off, Turn Power On
> > >
> > > Same Virtual Address for the Object.
> > >
> > > (if Object is destroyed, It's addresses are automatically
> > > voided from any future use. (cuts down on some kinds of Viruses)
> > >
> > > PC, Unix, Mainframe, Power Off, Power On = New set of virtual
addresses.
> > >
> > > I believe It's not a normal Paging File architecture.
> > >
> > > John
> > >
> > >
> > > _______________________________________________
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