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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=823174603-18112010>I thought I might add a bit on
this.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=823174603-18112010></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=823174603-18112010>I've done a number of investigations recently on
performance involving TCP/IP and VMs.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=823174603-18112010></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=823174603-18112010>Generally, I've found the access methodology is the
least of your worries. :)</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=823174603-18112010></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=823174603-18112010>The main culprit being 'old
faithful':</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=823174603-18112010> TCP performance = TCP
window/latency</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=823174603-18112010></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=823174603-18112010>I've seen a couple of cases of added latency of
virtualisation. One case where we did a packet cap in the VM, vs a packet cap vs
a mirror'd port closest to the physical host and there was a 6ms latency
differential. Where the rest of the path is sub 1ms latency, 6ms added latency
is a non-trivial hit to performance.</SPAN></FONT></DIV>
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<P class=MsoNormal><B><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Calibri">Craig
Meyers<o:p></o:p></SPAN></B></P>
<P class=MsoNormal><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Calibri">Senior
Data Communications Engineer<o:p></o:p></SPAN></P>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Calibri">Ph:
(07) 323 90283
<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Calibri">Mob:
0408 452 884<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Calibri">Email:
<A
href="mailto:craig.meyers@citec.com.au">craig.meyers@citec.com.au</A><o:p></o:p></SPAN></P>
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<P class=MsoNormal><SPAN
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w:st="on">Queensland</st1:State></st1:place></ST1:PLACE></ST1:STATE>: strong,
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<FONT face=Tahoma size=2><B>From:</B> ausnog-bounces@lists.ausnog.net
[mailto:ausnog-bounces@lists.ausnog.net] <B>On Behalf Of </B>Bruce
Renner<BR><B>Sent:</B> Thursday, 18 November 2010 1:23 PM<BR><B>To:</B> Jay
Mitchell<BR><B>Cc:</B> ausnog<BR><B>Subject:</B> Re: [AusNOG] VM throughput to
network<BR></FONT><BR></DIV>
<DIV></DIV>A quick google search revealed this.
<DIV><BR></DIV>
<DIV><A
href="http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1004048">http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1004048</A></DIV>
<DIV><BR></DIV>
<DIV><A
href="http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1004048"></A>The
short answer is yes, ESX can use 2 or more nics to improve throughput.</DIV>
<DIV><BR></DIV>
<DIV>Cheers All, Bruce</DIV>
<DIV><BR></DIV>
<DIV><BR><BR>
<DIV class=gmail_quote>On Thu, Nov 18, 2010 at 12:44 PM, Jay Mitchell <SPAN
dir=ltr><<A href="mailto:jay@miscreant.org">jay@miscreant.org</A>></SPAN>
wrote:<BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<DIV lang=EN-AU vlink="purple" link="blue">
<DIV>
<P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d">It’s
configurable at the VMWare side also:</SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d"></SPAN> </P>
<P><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d"><SPAN>-<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN></SPAN><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d">Route based
on the originating virtual port ID</SPAN></P>
<P><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d"><SPAN>-<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN></SPAN><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d">Route based
in IP hash </SPAN></P>
<P><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d"><SPAN>-<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN></SPAN><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d">Route based
on source MAC hash</SPAN></P>
<P><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d"><SPAN>-<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN></SPAN><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d">Use
explicit failover order</SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d"></SPAN> </P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d">--Jay</SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d"></SPAN> </P>
<P class=MsoNormal><B><SPAN lang=EN-US
style="FONT-SIZE: 10pt">From:</SPAN></B><SPAN lang=EN-US
style="FONT-SIZE: 10pt"> <A href="mailto:ausnog-bounces@lists.ausnog.net"
target=_blank>ausnog-bounces@lists.ausnog.net</A> [mailto:<A
href="mailto:ausnog-bounces@lists.ausnog.net"
target=_blank>ausnog-bounces@lists.ausnog.net</A>] <B>On Behalf Of </B>Daniel
Thoroughgood<BR><B>Sent:</B> Thursday, 18 November 2010 11:12 AM<BR><B>To:</B>
ausnog<BR><B>Subject:</B> Re: [AusNOG] VM throughput to network</SPAN></P>
<P class=MsoNormal> </P>
<DIV>
<P class=MsoNormal>I believe ESX load-balances outbound traffic based
upon destination MAC address. If traffic is mostly going to a default
gateway, or a storage device, then it's unlikely to be moved over more than
one link.</P>
<DIV>
<P class=MsoNormal> </P></DIV>
<DIV>
<P class=MsoNormal>Incoming traffic depends on the
switch.</P></DIV></DIV></DIV></DIV><BR>_______________________________________________<BR>AusNOG
mailing list<BR><A
href="mailto:AusNOG@lists.ausnog.net">AusNOG@lists.ausnog.net</A><BR><A
href="http://lists.ausnog.net/mailman/listinfo/ausnog"
target=_blank>http://lists.ausnog.net/mailman/listinfo/ausnog</A><BR><BR></BLOCKQUOTE></DIV><BR><BR
clear=all><BR>-- <BR><FONT color=#1f497d><B><FONT
face="arial, helvetica, sans-serif">Bruce Renner<BR></FONT></B></FONT><FONT
color=#1f497d size=4><SPAN style="FONT-SIZE: 10pt"><FONT
face="arial, helvetica, sans-serif">Hosted Services</FONT></SPAN></FONT>
<DIV><FONT color=#1f497d size=4><SPAN style="FONT-SIZE: 10pt"><FONT
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