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Xen Networking – Bonding with VLAN Tagging

The simple scripts in /etc/xen/scripts which manage networking are fine for most usages, however, when your server is using bonding together with VLAN tagging (802.11q) you should consider an alternative. A PDF document written by Mark Nielsen, GPS Senior Consultant, Red Hat, Inc (I lost the original link, sorry) named “BOND/VLAN/Xen Network Configuration” as a…

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Xen VMs performance collection

Unlike VMware Server, Xen’s HyperVisor does not allow an easy collection of performance information. The management machine, called “Domain-0” is actually a privileged virtual machine, and thus – get its own small share of CPUs and RAM. Collecting performance information on it will lead to, well, collecting performance information for a single VM, and not…

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Oracle RAC with EMC iSCSI Storage Panics

I have had a system panicking when running the mentioned below configuration: RedHat RHEL 4 Update 6 (4.6) 64bit (x86_64) Dell PowerEdge servers Oracle RAC 11g with Clusterware 11g EMC iSCSI storage EMC PowerPate Vote and Registry LUNs are accessible as raw devices Data files are accessible through ASM with libASM During reboots or shutdowns,…