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Subject: RE: Free BSD for Yahoo test
Date: Fri, 14 Sep 2007 08:12:21 -0800
Message-ID: <BB375AF679D4A34E9CA8DFA650E2B04E0346A978@onstor-exch02.onstor.net>
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Thread-Topic: Free BSD for Yahoo test
Thread-Index: Acf26Im0tCY1uYWmRo2snDYAjReFggAAA2Eg
From: "John Rogers" <john.rogers@onstor.com>
To: "Brian Montero" <brian.montero@onstor.com>
Cc: "Fay Chong" <fay.chong@onstor.com>,
	"Paul Hammer" <paul.hammer@onstor.com>,
	"Brian Baker" <brian.baker@onstor.com>,
	"Maxim Kozlovsky" <maxim.kozlovsky@onstor.com>,
	"Andy Sharp" <andy.sharp@onstor.com>

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Brian,

We are hearing this story too much!! We have a performance problem with
modern kernels. The following list of Operating Systems have been
reported to SUCK at nfs.

Red Hat EL 4
Red Hat EL 5
Ubuntu Feisty Fawn
Debian the latest version?
SUSE 10
FreeBSD 6.2

Either something is majorly wrong with NFS or we have a problem handling
it.

While this latest occurrence may jeopardize our Yahoo deal, if we don't
figure out what the problem is and how to fix it, we will be in deep doo
doo in similar situations.

I had reported previously that there were several red hat bugs that
definitely could cause this. However this is starting to be far too
prevelant. I know recently that NFS has become more complex adding
additional overhead for checking various operations and supporting more
file acls.

John

_____________________________________________
From: Fay Chong=20
Sent: Friday, September 14, 2007 9:02 AM
To: John Rogers
Cc: Brian Montero; Fay Chong
Subject: Free BSD for Yahoo test

John,
As I mentioned yesterday, I see about 15 MB/sec doing dd with FreeBSD6.2
while using RHEL3 with the same dd statement yields about 50MB/sec. I
downloaded FreeBSD 4.11 so I will burn the CD's and install on
10.3.62.21. I'll keep you posted.
Thanks
Fay

Fay Chong
Sr. Performance Engineer
ONStor, Inc.
fay.chong@onstor.com
408.376.3130 (w)



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<TITLE>RE: Free BSD for Yahoo test</TITLE>
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<!-- Converted from text/rtf format -->

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">Brian,</FONT></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">We are hearing this story too much!! We have a =
performance problem with modern kernels</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">. The following list of Operating Systems have =
been reported to SUCK at nfs.</FONT></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">Red Hat EL 4</FONT></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">Red Hat EL 5</FONT></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">Ubuntu Feisty Fawn</FONT></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">Debian the latest version?</FONT></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">SUSE 10</FONT></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">FreeBSD 6.2</FONT></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">Either something is majorly wrong with NFS or we have a =
problem handling it</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">.</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">While this latest</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"> <FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">occurrence</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial"> may</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"> <FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">jeopardize</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial"> our Yahoo deal, if we</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"> <FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">don&#8217;t</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial"></FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"> <FONT COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">figure =
out what the problem is and how to fix it, we will be in deep doo doo in =
similar situations.</FONT></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">I had reported previously that there were several red hat =
bugs that definitely could cause this.</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial"> However this is starting to be far too =
prevelant. I know recently that NFS has become more complex adding =
additional overhead for checking various operations and supporting more =
file acls.</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">John</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT SIZE=3D2 =
FACE=3D"Tahoma">_____________________________________________<BR>
</FONT></SPAN><SPAN LANG=3D"en-us"><B></B></SPAN><SPAN =
LANG=3D"en-us"><B><FONT SIZE=3D2 =
FACE=3D"Tahoma">From:</FONT></B></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"><FONT SIZE=3D2 FACE=3D"Tahoma"> Fay Chong<BR>
</FONT></SPAN><SPAN LANG=3D"en-us"><B></B></SPAN><SPAN =
LANG=3D"en-us"><B><FONT SIZE=3D2 =
FACE=3D"Tahoma">Sent:</FONT></B></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"><FONT SIZE=3D2 FACE=3D"Tahoma"> Friday, September 14, =
2007 9:02 AM<BR>
</FONT></SPAN><SPAN LANG=3D"en-us"><B></B></SPAN><SPAN =
LANG=3D"en-us"><B><FONT SIZE=3D2 =
FACE=3D"Tahoma">To:</FONT></B></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"><FONT SIZE=3D2 FACE=3D"Tahoma"> John Rogers<BR>
</FONT></SPAN><SPAN LANG=3D"en-us"><B></B></SPAN><SPAN =
LANG=3D"en-us"><B><FONT SIZE=3D2 =
FACE=3D"Tahoma">Cc:</FONT></B></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"><FONT SIZE=3D2 FACE=3D"Tahoma"> Brian Montero; Fay =
Chong<BR>
</FONT></SPAN><SPAN LANG=3D"en-us"><B></B></SPAN><SPAN =
LANG=3D"en-us"><B><FONT SIZE=3D2 =
FACE=3D"Tahoma">Subject:</FONT></B></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT SIZE=3D2 =
FACE=3D"Tahoma"> Free BSD for Yahoo test</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT SIZE=3D2 =
FACE=3D"Arial">John,</FONT></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT SIZE=3D2 FACE=3D"Arial">As I =
mentioned yesterday, I see about 15 MB/sec doing dd with FreeBSD6.2 =
while using RHEL3 with the same dd statement yields about 50MB/sec. I =
downloaded FreeBSD 4.11 so I will burn the CD&#8217;s and install on =
10.3.62.21. I&#8217;ll keep you posted.</FONT></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT SIZE=3D2 =
FACE=3D"Arial">Thanks</FONT></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT SIZE=3D2 =
FACE=3D"Arial">Fay</FONT></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"></SPAN><A NAME=3D""><SPAN =
LANG=3D"en-us"><FONT SIZE=3D2 FACE=3D"Arial">Fay =
Chong</FONT></SPAN></A></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT SIZE=3D2 FACE=3D"Arial">Sr. =
Performance Engineer</FONT></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT SIZE=3D2 =
FACE=3D"Arial">ONStor, Inc.</FONT></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT SIZE=3D2 =
FACE=3D"Arial">fay.chong@onstor.com</FONT></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"><FONT SIZE=3D2 =
FACE=3D"Arial">408.376.3130 (w)</FONT></SPAN></P>

<P ALIGN=3DLEFT><SPAN LANG=3D"en-us"></SPAN></P>

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