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Date: Thu, 14 Feb 2008 18:31:09 -0800
From: Andrew Sharp <andy.sharp@onstor.com>
To: "Raj Kumar" <raj.kumar@onstor.com>
Cc: "Tim Gardner" <tim.gardner@onstor.com>
Subject: Re: Cougar to Bobcat migration strategy document for review
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You said "onto it"

On Thu, 14 Feb 2008 17:21:15 -0800 "Raj Kumar" <raj.kumar@onstor.com>
wrote:

> LOL.
> 
> -----Original Message-----
> From: Tim Gardner 
> Sent: Thursday, February 14, 2008 5:20 PM
> To: Andy Sharp; Raj Kumar
> Subject: RE: Cougar to Bobcat migration strategy document for review
> 
> Now we have the picture for the poster for the cougar migration
> project. Quick, put Andy L onto it!
> 
> -----Original Message-----
> From: Andy Sharp 
> Sent: Thursday, February 14, 2008 5:04 PM
> To: Raj Kumar
> Cc: Sripal Surendiran (HCL); dl-Design Review
> Subject: Re: Cougar to Bobcat migration strategy document for review
> 
> On Thu, 14 Feb 2008 16:09:19 -0800 "Raj Kumar" <raj.kumar@onstor.com>
> wrote:
> 
> > Hi all,
> > 
> >  
> > 
> > Is everybody ok with this requirement?
> > 
> >  
> > 
> > 1.	"Migration requires downtime of the entire Bobcat cluster.
> > 
> >  
> > 
> > The following operation will add up to the total downtime while we
> > migrate from BC to CG.
> > 
> >  
> > 
> > For Each node in a cluster:
> > 
> >  
> > 
> > 1.	Power down BC and take care removing all cables, label
> > them, remove power cable, flash cards, label them.
> > 2.	Remove BC from the rack
> > 3.	mount cougar
>         ^^^^^^^^^^^^
> 
> Hmm, sounds rather zoological.  Perhaps "Install Cougar in rack"?
> 
> > 4.	Installing FP/FC cables and modifying MAC and rebooting it
> > again.
> > 5.	Usual boot up time + updating config from 2ndry flash
> > 
> >  
> > 
> > The above tasks can take anywhere between 50 minutes to 2 hours
> > depends on the racking conditions and/or labor skills/availability. 
> > 
> >  
> > 
> > If you have a 2 node, total down time: 1 hours 40 minutes to 4 hours
> > 
> > If you have 4 node: 3 hours 20 minutes to 8 hours.
> > 
> >  
> > 
> > We need to be prepared for the worst case scenario as well. If for
> > any reason we run into some issues bringing up services in cougar,
> > we will need to revert back to BC. It will be the same time it
> > takes to migrate to cougar.
> > 
> >  
> > 
> > Is this downtime acceptable? 
> > 
> >  
> > 
> > Did we consider some kind of rolling upgrade? Possibly supporting
> > BC-CG cluster just for upgrade purposes?
> > 
> >  
> > 
> > Thanks.
> > 
> >  
> > 
> >  
> > 
> > ________________________________
> > 
> > From: Sripal Surendiran (HCL) 
> > Sent: Thursday, February 07, 2008 8:07 AM
> > To: dl-Design Review
> > Cc: Sripal Surendiran (HCL)
> > Subject: Cougar to Bobcat migration strategy document for review
> > 
> >  
> > 
> > Hi all,
> > 
> >  
> > 
> > PFA Bobcat to Cougar migration strategy functional specification
> > document. Please do respond me with your review comments.
> > 
> >  
> > 
> > Regards,
> > 
> > Sripal.
> > 
