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[Xen-devel] MYSQL bechmark results on XEN and NFS

From: jessie smart <jessiesmart354@xxxxxxxxx>

Date: Mon, 24 Jan 2005 15:07:03 -0800 (PST)

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List-id: List for Xen developers <xen-devel.lists.sourceforge.net>

I am trying to setup mysql on XEN. I need to set it up on NFS so I can migrate the domain when needed.

I am getting unexpected results and wanted to get some feedback.

Here is my setup:

NFS server

Dual 2.0 Ghz AMD Opteron

2GB of RAM

Broadcom GB NIC

Standard Fedora Core 3 (FC3)

Mysql w/tpc-c medium databases on the NFS share

XenU filesystem on the NFS share

Xen machine

Dual 2.0 Ghz AMD Opteron

2GB of RAM

Broadcom GB NIC

FC3 w/XEN kernel patch

Dom0 = 512MB RAM

DomU = 512MB RAM

TPC-C client

PIII 2.0 Ghz

512 MB RAM

Standard Fedora Core 2

TCP-C client

Results using the tpc-c benchmark:

Baseline ~3300 new-ops per second

Machine 2 booted to the standard FC3

Xen0 ~ 1700 new-ops per second

Machine 2 booted to Xen kernel with 512MB of RAM

XenU ~500 new ops per second

Machine 2 booted to Xen kernel with 512MB of RAM

DomU booted from NFS share with 512MB of RAM

Am I missing something here or is that much degradation expected when booting a virtual machine over NFS.

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