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Subject: RE: Cougar to Bobcat migration strategy document for review
Date: Thu, 14 Feb 2008 20:05:37 -0700
Message-ID: <BB375AF679D4A34E9CA8DFA650E2B04E0856E87A@onstor-exch02.onstor.net>
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Thread-Topic: Cougar to Bobcat migration strategy document for review
Thread-Index: AchvetMEzCIMMTwNRYKfaLNB+Prr5AAAGt7wAACOSfAAAHyQMA==
References: <BB375AF679D4A34E9CA8DFA650E2B04E0856E85E@onstor-exch02.onstor.net> <BB375AF679D4A34E9CA8DFA650E2B04E0856E868@onstor-exch02.onstor.net>
From: "Tim Gardner" <tim.gardner@onstor.com>
To: "Raj Kumar" <raj.kumar@onstor.com>,
	"Andy Sharp" <andy.sharp@onstor.com>

light snow yesterday
temps around 0C
Drank some great beer last night. Looking forward to some more tonight.
The Canadians sure are friendly.

-----Original Message-----
From: Raj Kumar=20
Sent: Thursday, February 14, 2008 6:51 PM
To: Tim Gardner; Andy Sharp
Subject: RE: Cougar to Bobcat migration strategy document for review

You in Canada eh? How is the weather? Must be 30 cm snow and -40 C
outside. I had been there and glad to be back here.

-----Original Message-----
From: Tim Gardner=20
Sent: Thursday, February 14, 2008 6:34 PM
To: Andy Sharp; Raj Kumar
Subject: RE: Cougar to Bobcat migration strategy document for review

must be the Canadian influence.

-----Original Message-----
From: Andy Sharp=20
Sent: Thursday, February 14, 2008 6:31 PM
To: Raj Kumar
Cc: Tim Gardner
Subject: Re: Cougar to Bobcat migration strategy document for review

You said "onto it"

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

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