Hardware: X4150, 8 cores, 8Gb RAM; 2 off
Dom0: b122, limited to 2 cores, 2Gb RAM
DomUs: 4 Solaris 10u7, 2 with 1 core 1Gb and 2 with 2 cores 2 GB
The single core DomUs act as DHCP/LDAP servers, the two core DomUs
act as fileservers
problem: Under heavy load the network on the DomU stops working. So for
example rsync between the servers on different metal will work fine for up
to 30 minutes and then stop. Cannot ping out of or in to the DomU, but
ifconfig and dladm appear to show everything OK. Reboot the DomU and it
is all back to normal. Happens if the LDAP and DHCP server comes under
heavy load (class of 150 trying to log in to workstations simultaneously)
When lightly loaded the machines have been Ok
The ports are at 1000Mb, but I don't remember the problem occurring when
they were going at 100Mb
So, several questions.
Has anyone else seen this?
What can I look at to track down the cause, I cannot see anything obvious
in the logs?
Two of the DomUs on each machine have dedicated network ports. At present
they are bridged through Dom0, I believe that in this situation I can go
straight to the port from the DomU. Is how to do this documented anywhere
and can I make the change without having to rebuild the DomU?
Relevant part of xml file:
<emulator>/usr/lib/xen/bin/qemu-dm</emulator>
<interface type='bridge'>
<mac address='52:54:00:11:48:0f'/>
<source bridge='e1000g2'/>
<script path='/usr/lib/xen/scripts/vif-vnic'/>
<target dev='vif11.0'/>
</interface>
Thanks for any help
John
--
John Landamore
Department of Computer Science
University of Leicester
University Road, LEICESTER, LE1 7RH
j.landam...@mcs.le.ac.uk
Phone: +44 (0)116 2523410 Fax: +44 (0)116 2523604
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