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


  • To: xen-devel@xxxxxxxxxxxxxxxxxxxxx
  • From: jessie smart <jessiesmart354@xxxxxxxxx>
  • Date: Mon, 24 Jan 2005 15:07:03 -0800 (PST)
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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:

 

  1. 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

 

  1. 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

 

  1. 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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