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Subject: RE: fc performance problem
Date: Fri, 21 Dec 2007 11:01:03 -0800
Message-ID: <BB375AF679D4A34E9CA8DFA650E2B04E073AC855@onstor-exch02.onstor.net>
In-Reply-To: <BB375AF679D4A34E9CA8DFA650E2B04E072E0DA6@onstor-exch02.onstor.net>
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Thread-Topic: fc performance problem
Thread-Index: AchDNp+VH2jFT8c+ShG8zYDV3AQn5QAAB4lwAAAGt8AAMz0vIA==
References: <BB375AF679D4A34E9CA8DFA650E2B04E072E0DA1@onstor-exch02.onstor.net> <BB375AF679D4A34E9CA8DFA650E2B04E018A6A9F@onstor-exch02.onstor.net> <BB375AF679D4A34E9CA8DFA650E2B04E072E0DA6@onstor-exch02.onstor.net>
From: "Eric Barrett" <eric.barrett@onstor.com>
To: "Maxim Kozlovsky" <maxim.kozlovsky@onstor.com>,
	"Jeff Miller" <jeff.miller@onstor.com>,
	"dl-Cougar" <dl-Cougar@onstor.com>

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Not unheard of under load.


> _____________________________________________=20
> From: 	Maxim Kozlovsky =20
> Sent:	Thursday, December 20, 2007 10:35 AM
> To:	Jeff Miller; dl-Cougar
> Subject:	RE: fc performance problem
>=20
> A disk with 50msec write time?=20
>=20
> _____________________________________________
> From: Jeff Miller=20
> Sent: Thursday, December 20, 2007 10:33 AM
> To: Maxim Kozlovsky; dl-Cougar
> Subject: RE: fc performance problem
>=20
> Could it also be the disk?
>=20
> _____________________________________________
> From: Maxim Kozlovsky=20
> Sent: Thursday, December 20, 2007 10:32 AM
> To: dl-Cougar
> Subject: fc performance problem
>=20
> The FC performance problem does not happen on the new cougars that QA
> has, the I/O times are more or less acceptable:
>=20
>=20
> g6r10 NIS-G6R10 diag> stats times show -c SCSI_FC
> kpi                                        calls        total seconds
> seconds/call
>   SCSI_READ                                    393
> 0.230130             0.000585
>   SCSI_WRITE                                116328
> 106.531880             0.000915
> SCSI_FC                                   116721           106.762010
> 0.000914
>=20
> Looks like a hardware problem with rev1.
>=20
>=20

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<TITLE>RE: fc performance problem</TITLE>
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<P><FONT SIZE=3D2 FACE=3D"Arial">Not unheard of under load.</FONT>
</P>
<BR>

<P><FONT SIZE=3D1 =
FACE=3D"Tahoma">_____________________________________________ </FONT>

<BR><B><FONT SIZE=3D1 FACE=3D"Tahoma">From: &nbsp;</FONT></B> <FONT =
SIZE=3D1 FACE=3D"Tahoma">Maxim Kozlovsky&nbsp; </FONT>

<BR><B><FONT SIZE=3D1 FACE=3D"Tahoma">Sent:&nbsp;&nbsp;</FONT></B> <FONT =
SIZE=3D1 FACE=3D"Tahoma">Thursday, December 20, 2007 10:35 AM</FONT>

<BR><B><FONT SIZE=3D1 =
FACE=3D"Tahoma">To:&nbsp;&nbsp;&nbsp;&nbsp;</FONT></B> <FONT SIZE=3D1 =
FACE=3D"Tahoma">Jeff Miller; dl-Cougar</FONT>

<BR><B><FONT SIZE=3D1 =
FACE=3D"Tahoma">Subject:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT>=
</B> <FONT SIZE=3D1 FACE=3D"Tahoma">RE: fc performance problem</FONT>
</P>

<P><FONT COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">A disk with 50msec =
write time? </FONT>
</P>

<P><FONT SIZE=3D2 =
FACE=3D"Tahoma">_____________________________________________<BR>
</FONT><B><FONT SIZE=3D2 FACE=3D"Tahoma">From:</FONT></B><FONT SIZE=3D2 =
FACE=3D"Tahoma"> Jeff Miller<BR>
</FONT><B><FONT SIZE=3D2 FACE=3D"Tahoma">Sent:</FONT></B><FONT SIZE=3D2 =
FACE=3D"Tahoma"> Thursday, December 20, 2007 10:33 AM<BR>
</FONT><B><FONT SIZE=3D2 FACE=3D"Tahoma">To:</FONT></B><FONT SIZE=3D2 =
FACE=3D"Tahoma"> Maxim Kozlovsky; dl-Cougar<BR>
</FONT><B><FONT SIZE=3D2 FACE=3D"Tahoma">Subject:</FONT></B><FONT =
SIZE=3D2 FACE=3D"Tahoma"> RE: fc performance problem</FONT>
</P>

<P><FONT COLOR=3D"#000080" SIZE=3D2 FACE=3D"Arial">Could it also be the =
disk?</FONT>
</P>

<P><FONT SIZE=3D2 =
FACE=3D"Tahoma">_____________________________________________<BR>
</FONT><B><FONT SIZE=3D2 FACE=3D"Tahoma">From:</FONT></B><FONT SIZE=3D2 =
FACE=3D"Tahoma"> Maxim Kozlovsky<BR>
</FONT><B><FONT SIZE=3D2 FACE=3D"Tahoma">Sent:</FONT></B><FONT SIZE=3D2 =
FACE=3D"Tahoma"> Thursday, December 20, 2007 10:32 AM<BR>
</FONT><B><FONT SIZE=3D2 FACE=3D"Tahoma">To:</FONT></B><FONT SIZE=3D2 =
FACE=3D"Tahoma"> dl-Cougar<BR>
</FONT><B><FONT SIZE=3D2 FACE=3D"Tahoma">Subject:</FONT></B><FONT =
SIZE=3D2 FACE=3D"Tahoma"> fc performance problem</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Arial">The FC performance problem does not =
happen on the new cougars that QA has, the I/O times are more or less =
acceptable:</FONT>
</P>
<BR>

<P><FONT SIZE=3D2 FACE=3D"Arial">g6r10 NIS-G6R10 diag&gt; stats times =
show -c SCSI_FC</FONT>

<BR><FONT SIZE=3D2 =
FACE=3D"Arial">kpi&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
calls&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; total =
seconds&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
seconds/call</FONT>

<BR><FONT SIZE=3D2 FACE=3D"Arial">&nbsp; =
SCSI_READ&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
 =
393&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; =
0.230130&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp; 0.000585</FONT>

<BR><FONT SIZE=3D2 FACE=3D"Arial">&nbsp; =
SCSI_WRITE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
116328&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
106.531880&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp; 0.000915</FONT>

<BR><FONT SIZE=3D2 =
FACE=3D"Arial">SCSI_FC&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp; =
116721&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
106.762010&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp; 0.000914</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Arial">Looks like a hardware problem with =
rev1.</FONT>
</P>
<BR>

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