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Subject: RE: Wireshark Red Hat 3 and 5 NFS sequential performance 
Date: Mon, 24 Sep 2007 13:40:01 -0800
Message-ID: <BB375AF679D4A34E9CA8DFA650E2B04E05B46316@onstor-exch02.onstor.net>
In-Reply-To: <BB375AF679D4A34E9CA8DFA650E2B04E05A25C3D@onstor-exch02.onstor.net>
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Thread-Topic: Wireshark Red Hat 3 and 5 NFS sequential performance 
Thread-Index: Acf+RMKAn/1cdg8fR06ZJVlest05fwAq0kVw
References: <BB375AF679D4A34E9CA8DFA650E2B04E05A25C3D@onstor-exch02.onstor.net>
From: "Maxim Kozlovsky" <maxim.kozlovsky@onstor.com>
To: "Fay Chong" <fay.chong@onstor.com>,
	"Paul Hammer" <paul.hammer@onstor.com>,
	"Jonathan Goldick" <jonathan.goldick@onstor.com>,
	"Jobi Ariyamannil" <jobi.ariyamannil@onstor.com>,
	"Andy Sharp" <andy.sharp@onstor.com>
Cc: "Brian Montero" <brian.montero@onstor.com>

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What exactly was this test doing? Is it single direction, or
bidirectional? The excel spreadsheet seems to imply that it is
bidirectional.

I've tried bidirectional test and got completely different results with
almost identical performance:

rhel3 - read 30MB/sec write 46MB/sec,=20
rhel5 - read 29.6MB/sec write 53.1MB/s

The test that I was running:

Rh3

time dd if=3D/1/file1 of=3D/dev/zero bs=3D32k ; skill -INT dd &
86187+0 records in
86187+0 records out

real    1m27.021s
user    0m0.090s
sys     0m11.740s

time dd if=3D/dev/zero of=3D/1/file2 bs=3D32k count=3D131072 ; skill =
-INT dd &
131072+0 records in
131072+0 records out

real    1m28.539s
user    0m0.160s
sys     0m19.460s

rh5:

time dd if=3D/dev/zero of=3D/1/file2 bs=3D32k count=3D131072 ; skill =
-INT dd&
131072+0 records in
131072+0 records out
4294967296 bytes (4.3 GB) copied, 80.8301 seconds, 53.1 MB/s

real    1m20.834s
user    0m0.081s
sys     0m14.097s

time dd if=3D/1/file1 of=3D/dev/zero bs=3D32k ; skill -INT dd &
72297+0 records in
72296+0 records out
2368995328 bytes (2.4 GB) copied, 80.0069 seconds, 29.6 MB/s


real    1m20.023s
user    0m0.047s
sys     0m1.866s

Couple of things:

Do not post the results of running "vs stat agg" as actual performance,
who knows what this code is doing. For the case of dd the performance
can be measured directly as shown above.

With this high volume of traffic the Wireshark is lossy, you can not
rely on it to tell anything about dropped packets. Look at the TCP stats
for the number of retransmitted packets on the client and on the filer
instead (which by the way was 0 in my test on both rhel5 and rhel3).

In probably already doing this, but I thought I'll mention it just in
case - you should unmount and remount the volume on the client and vol
offline /vol online the volume on the filer between the tests to make
sure consistent initial state is used.

Could you please create a script(s) which can be used to run your
test(s) so we know we are on a same page?

Max

_____________________________________________
From: Fay Chong=20
Sent: Sunday, September 23, 2007 5:49 PM
To: Paul Hammer; Jonathan Goldick; Jobi Ariyamannil; Andy Sharp; Maxim
Kozlovsky
Cc: Brian Montero; Fay Chong
Subject: Wireshark Red Hat 3 and 5 NFS sequential performance=20

Hi,

Attached are some results from the Wireshark trace experiments on NFS
sequential read and write with Red Hat Linux release 3 and 5. The
Wireshark summaries seemed to have a lot of dropped packets as well as
TCP acked lost segment and TCP Previous segment lost messages. The
traces were saved so they can be reviewed by others. Also the vsvr stat
agg throughput results are included. Tests were run with and without the
wireshark. Let's talk about reviewing the data and refining the
experiment.

Thanks

Fay

 << File: wiresharkexp1.xls >>=20


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



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<P DIR=3DLTR><SPAN LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT =
COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">What exactly was this test =
doing? Is it single direction, or bidirectional?</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">The =
excel spreadsheet seems to imply that it is =
bidirectional</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 DIR=3DLTR><SPAN LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><BR>
<FONT COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">I</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">&#8217;</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">ve tried bidirectional test and got completely =
different results</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial"> with =
almost identical performance:</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT =
COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">rhel3</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"> <FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">&#8211;</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial"> read 30MB/sec write 46MB</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">/sec</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 DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">rhel5</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"> <FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">&#8211;</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial"> read =
29.6MB/sec write</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"> <FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">53.1MB/s</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><BR>
<FONT COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">The test that I was =
running:</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">Rh3</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT =
COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">time dd if=3D/1/file1 =
of=3D/dev/zero bs=3D32k ; skill</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"> <FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">&#8211;</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">INT</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"> <FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">dd</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">&amp;</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT =
COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">86187+0 records =
in</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">86187+0 records out</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">real&nbsp;&nbsp;&nbsp; 1m27.021s</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">user&nbsp;&nbsp;&nbsp; 0m0.090s</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">sys&nbsp;&nbsp;&nbsp;&nbsp; 0m11.740s</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT =
COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">t</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">ime dd if=3D/dev/zero of=3D/1/file2 bs=3D32k =
count=3D131072 ; skill -</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">INT</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial"> =
dd</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT =
COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial"> &amp;</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">131072+0 records in</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">131072+0 records out</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">real&nbsp;&nbsp;&nbsp; 1m28.539s</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">user&nbsp;&nbsp;&nbsp; 0m0.160s</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">sys&nbsp;&nbsp;&nbsp;&nbsp; 0m19.460s</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">rh5:</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT =
COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">time dd if=3D/dev/zero =
of=3D/1/file2 bs=3D32k count=3D131072 ; skill -INT dd</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">&amp;</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">131072+0 records in</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">131072+0 records out</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">4294967296 bytes (4.3 GB) copied, 80.8301 seconds, 53.1 =
MB/s</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">real&nbsp;&nbsp;&nbsp; 1m20.834s</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">user&nbsp;&nbsp;&nbsp; 0m0.081s</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">sys&nbsp;&nbsp;&nbsp;&nbsp; 0m14.097s</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT =
COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">time dd if=3D/1/file1 =
of=3D/dev/zero bs=3D32k ; skill -INT dd</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial"> &amp;</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">72297+0 records in</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">72296+0 records out</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">2368995328 bytes (2.4 GB) copied, 80.0069 seconds, 29.6 =
MB/s</FONT></SPAN></P>
<BR>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">real&nbsp;&nbsp;&nbsp; 1m20.023s</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">user&nbsp;&nbsp;&nbsp; 0m0.047s</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">sys&nbsp;&nbsp;&nbsp;&nbsp; 0m1.866s</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT =
COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">Couple of =
things</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">:</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">Do not post the results of running</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"> <FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">&#8220;</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">vs stat agg</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">&#8221;</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial"> as actual performance, who knows what this code =
is doing.</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"> =
<FONT COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">For the case of =
dd</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"> <FONT =
COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">the performance can be =
measured directly</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial"> as shown =
above.</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT =
COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">With this high volume of =
traffic t</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">he</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"> <FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">W</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">ireshark =
is lossy, you can not rely on it to tell anything about dropped packets. =
Look at the TCP stats for the number of retransmitted packets on the =
client and on the filer instead (which by th</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">e way was 0 in my test</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial"> on both rhel5 and rhel3</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 DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">In probably already doing this, but I thought =
I</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT =
COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">&#8217;</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">ll mention it just in case - =
y</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT =
COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">ou should unmount and remount =
the volume on the client and vol offline /vol online the volume on the =
filer between the tests to make sure consistent initial state is =
used.</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">Could you please create a script</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial">(s)</FONT></SPAN><SPAN =
LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" =
SIZE=3D2 FACE=3D"Arial"> which can be used to run your =
test</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">s</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"> so we =
know we are on a same page?</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT COLOR=3D"#000080" SIZE=3D2 =
FACE=3D"Arial">Max</FONT></SPAN><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"></SPAN><SPAN =
LANG=3D"en-us"></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"></SPAN><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"> Sunday, September 23, =
2007 5:49 PM<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"> Paul Hammer; Jonathan =
Goldick; Jobi Ariyamannil; Andy Sharp; Maxim Kozlovsky<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"> Wireshark Red Hat 3 and 5 NFS sequential =
performance</FONT></SPAN><SPAN LANG=3D"en-us"> </SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"></SPAN><SPAN LANG=3D"en-us"><FONT =
SIZE=3D2 FACE=3D"Arial">Hi,</FONT></SPAN></P>

<P DIR=3DLTR><SPAN LANG=3D"en-us"><FONT SIZE=3D2 FACE=3D"Arial">Attached =
are some results from the Wireshark trace experiments on NFS sequential =
read and write with Red Hat Linux release 3 and 5. The Wireshark =
summaries seemed to have a lot of dropped packets as well as TCP acked =
lost segment and TCP Previous segment lost messages. The traces were =
saved so they can be reviewed by others. Also the vsvr stat agg =
throughput results are included. Tests were run with and without the =
wireshark. Let&#8217;s talk about reviewing the data and refining the =
experiment.</FONT></SPAN></P>

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

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

<P DIR=3DLTR><SPAN LANG=3D"en-us">&nbsp;&lt;&lt; File: wiresharkexp1.xls =
&gt;&gt;</SPAN><SPAN LANG=3D"en-us"> </SPAN></P>
<BR>

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

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

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

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

<P DIR=3DLTR><SPAN LANG=3D"en-us"></SPAN></P>

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