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Subject: RE: max number Concurrent TCP sessions ?
Date: Thu, 4 Jan 2007 09:56:10 -0800
Message-ID: <BB375AF679D4A34E9CA8DFA650E2B04E01F15085@onstor-exch02.onstor.net>
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Thread-Topic: max number Concurrent TCP sessions ?
thread-index: AccwHhD3a3NzurKzQgOVSJxk9Y98SwAAG7FAAAK6nVA=
From: "Eric Barrett" <eric.barrett@onstor.com>
To: "Doug Cook" <doug.cook@onstor.com>,
	"Steffen Thuemmel" <steffen.thuemmel@onstor.com>,
	"dl-se" <dl-se@onstor.com>,
	"dl-cstech" <dl-cstech@onstor.com>

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Yes, it was raised a while back (1.3.1?).
=20
Steffen, I think it's unlikely the customer would see that problem -- I
believe Windows disconnects even a mapped drive after a certain period
of idleness, somewhere around 30 minutes.  And if they have all 2500
CIFS users active at once, they certainly need more than two Bobcats...
=20
NFS over TCP does not disconnect, so it's more subject to this
limitation.
=20
=20

________________________________

From: Doug Cook=20
Sent: Thursday, January 04, 2007 8:37 AM
To: Steffen Thuemmel; dl-se; dl-cstech
Subject: RE: max number Concurrent TCP sessions ?


I believe we are at 8K TCP connections in the current release. =20
=20
DC

________________________________

From: Steffen Thuemmel=20
Sent: Thursday, January 04, 2007 11:33 AM
To: dl-se; dl-cstech
Subject: max number Concurrent TCP sessions ?



The SAG on page 9-9 states a max. number of Concurrent TCP sessions of
4k.

If I would have a cluster, each unit serving one vsvr. Each vsvr has one
volume with 2500 CIFS user home shares. All users are present and logged
into their desktops. One unit breaks, the vsvr would fail over.

What happens ? Will the limit be hit and some of the users lose access
to their home_dirs ?

=20

Thanks for your help,

St.

=20

Steffen Thuemmel=20

Manager Systems Engineering

Central Europe

=20

ONStor

Schleussner Str. 42

D-63263 Neu-Isenburg

Germany

=20

telf.       +49 6102 884 84-0

mobil.     +49 173 673 3434

mail.       steffen.thuemmel@onstor.com

web.       www.onstor.com <http://www.onstor.com/>=20

=20


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<DIV dir=3Dltr align=3Dleft><SPAN class=3D685435417-04012007><FONT =
face=3DArial=20
size=3D2>Yes, it was raised a while back (1.3.1?).</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D685435417-04012007><FONT =
face=3DArial=20
size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D685435417-04012007><FONT =
face=3DArial=20
size=3D2>Steffen, I think it's unlikely the customer would see that =
problem -- I=20
believe Windows disconnects even a mapped drive after a certain period =
of=20
idleness, somewhere around 30 minutes.&nbsp; And if they have all 2500 =
CIFS=20
users active at once, they certainly need more than two=20
Bobcats...</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D685435417-04012007><FONT =
face=3DArial=20
size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D685435417-04012007><FONT =
face=3DArial=20
size=3D2>NFS over TCP does not disconnect, so it's more subject to this=20
limitation.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D685435417-04012007><FONT =
face=3DArial=20
size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D685435417-04012007><FONT =
face=3DArial=20
size=3D2></FONT></SPAN>&nbsp;</DIV><BR>
<DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr align=3Dleft>
<HR tabIndex=3D-1>
<FONT face=3DTahoma size=3D2><B>From:</B> Doug Cook <BR><B>Sent:</B> =
Thursday,=20
January 04, 2007 8:37 AM<BR><B>To:</B> Steffen Thuemmel; dl-se;=20
dl-cstech<BR><B>Subject:</B> RE: max number Concurrent TCP sessions=20
?<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D386353616-04012007><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>I believe we are at 8K TCP connections in the =
current=20
release.&nbsp; </FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D386353616-04012007><FONT =
face=3DArial=20
color=3D#0000ff size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D386353616-04012007><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>DC</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> Steffen Thuemmel =
<BR><B>Sent:</B>=20
Thursday, January 04, 2007 11:33 AM<BR><B>To:</B> dl-se;=20
dl-cstech<BR><B>Subject:</B> max number Concurrent TCP sessions=20
?<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=3DSection1>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">The SAG on page 9-9 states =
a max.=20
number of Concurrent TCP sessions of 4k.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">If I would have a cluster, =
each unit=20
serving one vsvr. Each vsvr has one volume with 2500 CIFS user home =
shares. All=20
users are present and logged into their desktops. One unit breaks, the =
vsvr=20
would fail over.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">What happens ? Will the =
limit be hit=20
and some of the users lose access to their home_dirs=20
?<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"><o:p>&nbsp;</o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Thanks for your=20
help,<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">St.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"><o:p>&nbsp;</o:p></SPAN></FONT></P>
<DIV>
<P class=3DMsoNormal><B><FONT face=3D"Times New Roman" size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt">Steffen Thuemmel=20
<o:p></o:p></SPAN></FONT></B></P>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt">Manager Systems =
Engineering<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><st1:place w:st=3D"on"><FONT face=3D"Times New =
Roman"=20
size=3D2><SPAN style=3D"FONT-SIZE: 10pt">Central=20
Europe</SPAN></FONT></st1:place><FONT size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt"><o:p></o:p></SPAN></FONT></P>
<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>
<P class=3DMsoNormal><B><FONT face=3DTahoma size=3D1><SPAN lang=3DDE=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 8pt; FONT-FAMILY: =
Tahoma">ONStor<o:p></o:p></SPAN></FONT></B></P>
<P class=3DMsoNormal><FONT face=3DTahoma size=3D1><SPAN lang=3DDE=20
style=3D"FONT-SIZE: 8pt; FONT-FAMILY: Tahoma">Schleussner Str.=20
42<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DTahoma size=3D1><SPAN lang=3DDE=20
style=3D"FONT-SIZE: 8pt; FONT-FAMILY: Tahoma">D-63263=20
Neu-Isenburg<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><st1:country-region w:st=3D"on"><st1:place =
w:st=3D"on"><FONT=20
face=3DTahoma size=3D1><SPAN=20
style=3D"FONT-SIZE: 8pt; FONT-FAMILY: =
Tahoma">Germany</SPAN></FONT></st1:place></st1:country-region><o:p></o:p>=
</P>
<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>
<P class=3DMsoNormal><B><FONT face=3DTahoma size=3D1><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 8pt; FONT-FAMILY: =
Tahoma">telf.</SPAN></FONT></B><B><FONT=20
face=3DTahoma size=3D2><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: =
Tahoma">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
</SPAN></FONT></B><B><FONT face=3DTahoma size=3D1><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 7.5pt; FONT-FAMILY: Tahoma">+49 =
6102 884=20
84-0</SPAN></FONT></B><B><FONT face=3DTahoma size=3D1><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 8pt; FONT-FAMILY: =
Tahoma"><o:p></o:p></SPAN></FONT></B></P>
<P class=3DMsoNormal><B><FONT face=3DTahoma size=3D1><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 8pt; FONT-FAMILY: Tahoma">mobil.=20
&nbsp;&nbsp;&nbsp; </SPAN></FONT></B><B><FONT face=3DTahoma =
size=3D1><SPAN=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 7.5pt; FONT-FAMILY: Tahoma">+49 =
173 673=20
3434<o:p></o:p></SPAN></FONT></B></P>
<P class=3DMsoNormal><B><FONT face=3DTahoma size=3D1><SPAN lang=3DFR=20
style=3D"FONT-WEIGHT: bold; FONT-SIZE: 8pt; FONT-FAMILY: =
Tahoma">mail.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
<A=20
href=3D"mailto:steffen.thuemmel@onstor.com">steffen.thuemmel@onstor.com</=
A><o:p></o:p></SPAN></FONT></B></P>
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style=3D"FONT-WEIGHT: bold; FONT-SIZE: 8pt; FONT-FAMILY: =
Tahoma">web.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
<A =
href=3D"http://www.onstor.com/">www.onstor.com</A></SPAN></FONT></B><SPAN=
=20
lang=3DFR><o:p></o:p></SPAN></P></DIV>
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