Ubuntu 12.10 Virtualization vs. Ubuntu 12.04 LTS, CentOS 6.3
Written by Michael Larabel in Operating Systems on 22 October 2012. Page 2 of 5. 15 Comments

With the Dbench disk benchmarking program, Ubuntu 12.10 shows improvements over Ubuntu 12.04.1 LTS for both the bare metal and virtualized performance. CentOS 6.3 was the slowest performer in both cases, but it also showed a problem with the virtualized disk results being slightly faster than the bare metal results. This CentOS/RHEL issue may come down to that version having an issue not fsync'ing always to the disk, as spotted in past years with other virtualized configurations with certain workloads.

Ubuntu 12.10 was also faster than its predecessor for the compile task inside CompileBench, but here it looks like with 12.10 there's a change where it might not be synchronizing to the disk.

The initial create test results from CompileBench for Ubuntu 12.10 were also a bit odd in the KVM virtualized environment.


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