On 4/29/2009 7:41:50 AM, Andrew Theurer wrote:
> I wanted to share some performance data for KVM and Xen. I thought it
> would be interesting to share some performance results especially
> compared to Xen, using a more complex situation like heterogeneous
> server consolidation.
>
> The Workload:
> The workload is one that simulates a consolidation of servers on to a
> single host. There are 3 server types: web, imap, and app (j2ee). In
> addition, there are other "helper" servers which are also
> consolidated: a db server, which helps out with the app server, and an
> nfs server, which helps out with the web server (a portion of the docroot is
> nfs mounted).
> There is also one other server that is simply idle. All 6 servers
> make up one set. The first 3 server types are sent requests, which in
> turn may send requests to the db and nfs helper servers. The request
> rate is throttled to produce a fixed amount of work. In order to
> increase utilization on the host, more sets of these servers are used.
> The clients which send requests also have a response time requirement
> which is monitored. The following results have passed the response
> time requirements.
>
> The host hardware:
> A 2 socket, 8 core Nehalem with SMT, and EPT enabled, lots of disks, 4
> x
> 1 GB Ethenret
>
> The host software:
> Both Xen and KVM use the same host Linux OS, SLES11. KVM uses the
> 2.6.27.19-5-default kernel and Xen uses the 2.6.27.19-5-xen kernel. I
> have tried 2.6.29 for KVM, but results are actually worse. KVM
> modules are rebuilt with kvm-85. Qemu is also from kvm-85. Xen
> version is "3.3.1_18546_12-3.1".
>
> The guest software:
> All guests are RedHat 5.3. The same disk images are used but
> different kernels. Xen uses the RedHat Xen kernel and KVM uses 2.6.29
> with all paravirt build options enabled. Both use PV I/O drivers. Software
> used:
> Apache, PHP, Java, Glassfish, Postgresql, and Dovecot.
>
Just for clarification. So are you using PV (Xen) Linux on Xen, not HVM? Is
that 32-bit or 64-bit?
.
Jun Nakajima | Intel Open Source Technology Center
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