Mod-27, with the ZFS on a separate SMS managed Mod-27

> -----Original Message-----
> From: IBM Mainframe Discussion List <[email protected]> On
> Behalf Of Jousma, David
> Sent: Thursday, October 04, 2018 11:30 AM
> To: [email protected]
> Subject: Re: SYSRES Volume Size (Was: S106 abends ...)
> 
> Just to expand on this a bit.  I have all mod-54 sysres volumes that we rotate
> through. It’s the quantity of ZFS that has blown that out:
> 
> ZFS - 398454 tracks
> Traditional - ~150K tracks.
> 
> 
> 
> -----Original Message-----
> From: Jousma, David
> Sent: Thursday, October 04, 2018 1:00 PM
> To: 'IBM Mainframe Discussion List' <[email protected]>
> Subject: RE: SYSRES Volume Size (Was: S106 abends ...)
> 
> Mod-54.   70+% utilized.
> 
> -----Original Message-----
> From: IBM Mainframe Discussion List <[email protected]> On
> Behalf Of Ed Jaffe
> Sent: Thursday, October 04, 2018 12:16 PM
> To: [email protected]
> Subject: SYSRES Volume Size (Was: S106 abends ...)
> 
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> What size SYSRES do most shops use these days?
> 
> We have settled on Mod-27 as our "standard" volume for almost everything.
> We also have some Mod-9s and Mod-216s for special purposes.
> 
> No Mod-1s, Mod-2s, Mod-3s, Mod-54s, or any other "oddball" sizes. Just the
> three described above...
> 
> On 10/4/2018 8:26 AM, Jesse 1 Robinson wrote:
> > I sympathize with IBM's predicament in reading the future maintenance
> tea leaves. The 'fix rate' for a product might be subject to guesstimation 
> from
> past experience. But the effects of future enhancements like SPEs and
> customer requirements are a bundle of uncertainties wrapped in unknowns.
> The change from six month to two year release cycles further clouded space
> predictions.
> >
> > I think customers are best off expecting data set expansions. A few like
> LINKLIB and LPALIB can be deliberately oversized as likely candidates for
> increase in a variety of components. But the migratable sysres volume is
> limited to whatever size installation has settled on. Secondary extents, in my
> view, allow for unpredictable expansion with acceptable risk.
> >
> > .
> > .
> > J.O.Skip Robinson
> > Southern California Edison Company
> > Electric Dragon Team Paddler
> > SHARE MVS Program Co-Manager
> > 323-715-0595 Mobile
> > 626-543-6132 Office ⇐=== NEW
> > [email protected]
> >
> >
> > -----Original Message-----
> > From: IBM Mainframe Discussion List [mailto:IBM-
> [email protected]]
> > On Behalf Of John Eells
> > Sent: Thursday, October 04, 2018 4:35 AM
> > To: [email protected]
> > Subject: (External):Re: S106 abends after copying into LINKLIST
> >
> > Elardus Engelbrecht wrote:
> >
> >> This is why you see in Program Directories the required space for each
> dataset/OMVS files needed for each product you ordered.
> > Let's just be clear about what those space numbers represent.
> >
> > They are:
> >
> > - a fixed percentage larger (10 or 15%, I forget right now) than the
> > amount of space consumed by each data set at a particular point in
> > time
> > - are measured at the specified block sizes when the FMIDs represented
> > by that program directory were submitted to software manufacturing and
> > never updated
> > - provide information for only that product and no others that might share
> the data set.
> >
> > So if PTFs cause the space required to grow by more than the fixed
> percentage, or you use different block sizes than we specify (which is not to
> your advantage in general), or fail to add the space required by all products
> sharing a data set together, you will be in x37 City before you know it.
> >
> > ServerPac production is smart enough to adjust space on the fly, BTW, so
> the free space allocated by default stays at a fixed percentage even as PTFs
> consume more space in the data sets for the products included.  For CBPDO,
> you get to guess yourself.
> >
> > --
> > John Eells
> > IBM Poughkeepsie
> > [email protected]
> 
> 
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