> -Original Message-
> From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
> Behalf Of David Betten
> Sent: Friday, 24 February 2006 11:22 PM
> To: IBM-MAIN@BAMA.UA.EDU
> Subject: Re: CFW and DFSORT
>
> I apologize, my earlier append was not clear. DFSORT does c
; > From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
> > Behalf Of Bruce Black
> > Sent: Friday, 24 February 2006 10:52 AM
> > To: IBM-MAIN@BAMA.UA.EDU
> > Subject: Re: CFW and DFSORT
> >
> > >
> > > You're from IBM right? S
n when the controller
has CFW OFF. The IO chaining behaviour suggests otherwise.
Ron
> -Original Message-
> From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
> Behalf Of Bruce Black
> Sent: Friday, 24 February 2006 10:52 AM
> To: IBM-MAIN@BAMA.UA.EDU
>
You're from IBM right? So you are saying that ESS and DS8K ignore CFW and
put a copy in the NVS anyway? Then why does DFSORT change its IO chaining
behaviour when CFW is on.
No, he said that if you disable CFW in the control unit but enable it in
DFSORT, the control unit ignores the CFW request
M Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
> Behalf Of David Betten
> Sent: Friday, 24 February 2006 3:11 AM
> To: IBM-MAIN@BAMA.UA.EDU
> Subject: Re: CFW and DFSORT
>
> You should not have a problem with DFSORT if you disable cache fast write
> in your contoller. Even i
You should not have a problem with DFSORT if you disable cache fast write
in your contoller. Even if the DFSORT default is CFW, the controller will
simply ignore the CFW flag and treat it as a normal write. Generally, I
have not seen a significant perfomrance impact to DFSORT when CFW is turned
o
n the same
behaviour with Syncsort.
Ron
> -Original Message-
> From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
> Behalf Of John (IBM-MAIN)
> Sent: Friday, 24 February 2006 12:59 AM
> To: IBM-MAIN@BAMA.UA.EDU
> Subject: Re: CFW and DFSORT
>
> > Hi
> Hi all
> because of GDPS Hyperswap-Tests we want to disable Cache Fast Write. We
> were wondering which jobs would be affected by this change and we found
> out that DFSORT has an option CFW=Y, which is our default.
> 1. how will DFSORT react if option CFW=Y is used and on the HW it is
> disabled
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