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Subject: RE: Cougar to Bobcat migration strategy document for review
Date: Thu, 14 Feb 2008 16:59:37 -0800
Message-ID: <BB375AF679D4A34E9CA8DFA650E2B04E0856E7E0@onstor-exch02.onstor.net>
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Thread-Topic: Cougar to Bobcat migration strategy document for review
Thread-Index: AchpodZPB1Qz2CcxRe6MoPEft3LLGAFwsTqAAAIuT4A=
References: <BB375AF679D4A34E9CA8DFA650E2B04EC247CD@onstor-exch02.onstor.net> <BB375AF679D4A34E9CA8DFA650E2B04E0856E776@onstor-exch02.onstor.net>
From: "Brian DeForest" <brian.deforest@onstor.com>
To: "Raj Kumar" <raj.kumar@onstor.com>,
	"Sripal Surendiran (HCL)" <sripal.surendiran@onstor.com>,
	"dl-Design Review" <dl-designreview@onstor.com>

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Supporting a mixed BC/CG cluster is not currently a requirement for
Cougar software.   If that were to become a new requirement, this
document would need to be revised to accomodate that.

________________________________

From: Raj Kumar=20
Sent: Thursday, February 14, 2008 4:09 PM
To: Sripal Surendiran (HCL); dl-Design Review
Subject: RE: Cougar to Bobcat migration strategy document for review



Hi all,

=20

Is everybody ok with this requirement?

=20

1.	"Migration requires downtime of the entire Bobcat cluster.=20

=20

The following operation will add up to the total downtime while we
migrate from BC to CG.

=20

For Each node in a cluster:

=20

1.	Power down BC and take care removing all cables, label them,
remove power cable, flash cards, label them.=20
2.	Remove BC from the rack=20
3.	mount cougar=20
4.	Installing FP/FC cables and modifying MAC and rebooting it
again.=20
5.	Usual boot up time + updating config from 2ndry flash=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

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.

=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

Is this downtime acceptable?=20

=20

Did we consider some kind of rolling upgrade? Possibly supporting BC-CG
cluster just for upgrade purposes?

=20

Thanks.

=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

Hi all,

=20

PFA Bobcat to Cougar migration strategy functional specification
document. Please do respond me with your review comments.

=20

Regards,

Sripal.


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<DIV dir=3Dltr align=3Dleft><SPAN class=3D483345400-15022008><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>Supporting a mixed BC/CG cluster is not =
currently a=20
requirement for Cougar software.&nbsp;&nbsp; If that were to become a =
new=20
requirement, this document would need to be revised to accomodate=20
that.</FONT></SPAN></DIV><BR>
<DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr align=3Dleft>
<HR tabIndex=3D-1>
<FONT face=3DTahoma size=3D2><B>From:</B> Raj Kumar <BR><B>Sent:</B> =
Thursday,=20
February 14, 2008 4:09 PM<BR><B>To:</B> Sripal Surendiran (HCL); =
dl-Design=20
Review<BR><B>Subject:</B> RE: Cougar to Bobcat migration strategy =
document for=20
review<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=3DSection1>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Hi=20
all,<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p>&nbsp;</o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Is everybody =
ok with=20
this requirement?<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p>&nbsp;</o:p></SPAN></FONT></P>
<OL style=3D"MARGIN-TOP: 0in" type=3D1>
  <LI class=3DMsoNormal=20
  style=3D"TEXT-ALIGN: justify; mso-list: l0 level1 lfo1"><FONT =
face=3DArial=20
  color=3Dnavy size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial">&#8220;</SPAN></FONT>Migration=20
  requires downtime of the entire Bobcat cluster.<o:p></o:p> </LI></OL>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p>&nbsp;</o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">The following =
operation=20
will add up to the total downtime while we migrate from BC to=20
CG.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p>&nbsp;</o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">For Each node =
in a=20
cluster:<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p>&nbsp;</o:p></SPAN></FONT></P>
<OL style=3D"MARGIN-TOP: 0in" type=3D1>
  <LI class=3DMsoNormal style=3D"COLOR: navy; mso-list: l1 level1 =
lfo2"><FONT=20
  face=3DArial color=3Dnavy size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Power down BC and take =
care=20
  removing all cables, label them, remove power cable, flash cards, =
label=20
  them.<o:p></o:p></SPAN></FONT>=20
  <LI class=3DMsoNormal style=3D"COLOR: navy; mso-list: l1 level1 =
lfo2"><FONT=20
  face=3DArial color=3Dnavy size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Remove BC from the=20
  rack<o:p></o:p></SPAN></FONT>=20
  <LI class=3DMsoNormal style=3D"COLOR: navy; mso-list: l1 level1 =
lfo2"><FONT=20
  face=3DArial color=3Dnavy size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">mount=20
  cougar<o:p></o:p></SPAN></FONT>=20
  <LI class=3DMsoNormal style=3D"COLOR: navy; mso-list: l1 level1 =
lfo2"><FONT=20
  face=3DArial color=3Dnavy size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Installing FP/FC cables =
and=20
  modifying MAC and rebooting it again.<o:p></o:p></SPAN></FONT>=20
  <LI class=3DMsoNormal style=3D"COLOR: navy; mso-list: l1 level1 =
lfo2"><FONT=20
  face=3DArial color=3Dnavy size=3D2><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Usual boot up time + =
updating=20
  config from 2ndry flash<o:p></o:p></SPAN></FONT> </LI></OL>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p>&nbsp;</o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">The above =
tasks can=20
take anywhere between 50 minutes to 2 hours depends on the racking =
conditions=20
and/or labor skills/availability. <o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p>&nbsp;</o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">If you have a =
2 node,=20
total down time: 1 hours 40 minutes to 4 =
hours<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">If you have 4 =
node: 3=20
hours 20 minutes to 8 hours.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p>&nbsp;</o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">We need to be =
prepared=20
for the worst case scenario as well. If for any reason we run into some =
issues=20
bringing up services in cougar, we will need to revert back to BC. It =
will be=20
the same time it takes to migrate to =
cougar.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p>&nbsp;</o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Is this =
downtime=20
acceptable? <o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p>&nbsp;</o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Did we =
consider some=20
kind of rolling upgrade? Possibly supporting BC-CG cluster just for =
upgrade=20
purposes?<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p>&nbsp;</o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial">Thanks.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p>&nbsp;</o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"><o:p>&nbsp;</o:p></SPAN></FONT></P>
<DIV>
<DIV class=3DMsoNormal style=3D"TEXT-ALIGN: center" align=3Dcenter><FONT =

face=3D"Times New Roman" size=3D3><SPAN style=3D"FONT-SIZE: 12pt">
<HR tabIndex=3D-1 align=3Dcenter width=3D"100%" SIZE=3D2>
</SPAN></FONT></DIV>
<P class=3DMsoNormal><B><FONT face=3DTahoma size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Tahoma">From:</SPAN></FONT></B><FONT=20
face=3DTahoma size=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Tahoma"> Sripal=20
Surendiran (HCL) <BR><B><SPAN style=3D"FONT-WEIGHT: =
bold">Sent:</SPAN></B>=20
Thursday, February 07, 2008 8:07 AM<BR><B><SPAN=20
style=3D"FONT-WEIGHT: bold">To:</SPAN></B> dl-Design Review<BR><B><SPAN=20
style=3D"FONT-WEIGHT: bold">Cc:</SPAN></B> Sripal Surendiran =
(HCL)<BR><B><SPAN=20
style=3D"FONT-WEIGHT: bold">Subject:</SPAN></B> Cougar to Bobcat =
migration=20
strategy document for review</SPAN></FONT><o:p></o:p></P></DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt"><o:p>&nbsp;</o:p></SPAN></FONT></P>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial color=3Dblack size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">Hi=20
all,</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt">&nbsp;<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">PFA Bobcat to Cougar =
migration=20
strategy functional specification document. Please do respond me with =
your=20
review comments.</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt">&nbsp;<o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Regards,</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Sripal.</SPAN></FONT><o:p></o:p></P></DIV></DIV></BODY></HTML>

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