See inline below.

> -----Original Message-----
> From: IBM Mainframe Discussion List [mailto:[email protected]]
> On Behalf Of suresh chacko
> Sent: Tuesday, May 24, 2016 1:31 PM
> To: [email protected]
> Subject: Re: z/OS Master/User catalog dataset re-organization
> 
> Hi Dave
> 
> Thank you,
> 
> Some thoughts...
> 
> a. If we have an online application which switches its log datasets every 2 
> to 3
> minutes, how we can manage the disconnect of catalog? Will it lead to an
> allocation failure? In this situation how we can avoid an allocation failure,
> what is the solution?
> 

I wouldn't count on or risk it. By quiet, I mean shortly before an IPL with 
most everything shutdown.

You could try to define a new user catalog. REPRO MERGECAT and DELETE/DEFINE 
the ALIAS(s). Still very likely to take more time than you have.

> b. Repro backup - understood.
> 
> c. Delete and Define -  In this step, is it better to use a new large dataset 
> or
> delete and define the same as bigger?

Either or. I'd keep the same name if it was me

> 
> d. Populate - Is this is done by Import? If not kindly explain.

Repro back in

> 
> Are steps of Examine and diagnose required?

If it's already broken, yes. 

> 
> Best regards,
> Suresh
> 
> 
> 
> 
> On Tue, May 24, 2016 at 11:32 PM, Gibney, Dave <[email protected]> wrote:
> 
> > 1. Buy a tool. Dino, or CR+, or ....
> > Or
> > 2. At a very quiet time: a. Discconnect the catalog. b. back it up via
> > repro. c. delete and defining it bigger. d. repopulate. e. import.
> > And it would be a good idea to IPL here.
> >
> > > -----Original Message-----
> > > From: IBM Mainframe Discussion List
> > > [mailto:[email protected]] On Behalf Of suresh chacko
> > > Sent: Tuesday, May 24, 2016 12:29 PM
> > > To: [email protected]
> > > Subject: z/OS Master/User catalog dataset re-organization
> > >
> > > Hello Group,
> > >
> > > Like to know the best practices in z/OS Catalog dataset management
> > > and what all are the steps involved in z/OS catalog dataset
> > > re-organization
> > activity.
> > >
> > > Kindly share from your expert experience and knowledge.
> > >
> > > Regards,
> > >
> > > Suresh N C
> > >
> > > --------------------------------------------------------------------
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> 
> 
> 
> --
> *SureshNc*
> 
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