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[Xen-users] Disk IO

To: Xen Users <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-users] Disk IO
From: Paras pradhan <pradhanparas@xxxxxxxxx>
Date: Mon, 25 Jan 2010 15:22:35 -0600
Delivery-date: Mon, 25 Jan 2010 13:25:57 -0800
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Hi,

I am doing disk IO test in dom0 and domU

dom0 has 1 CPU with 4GB of RAM
domU has 1 CPU with 1 GB of RAM. domU image is a filebacked image file in CLVM/GFS2 partition which connected to storage via Fibre SAN.

I am using iozone to test the performance and here are the outputs

dom0:

"Record size = 4 Kbytes "
"Output is in Kbytes/sec"

"  Initial write "  282829.86 

"        Rewrite "  469707.22 

"           Read "  657510.62 

"        Re-read " 1293660.70 

"   Reverse Read "  837261.74 

"    Stride read "  861772.51 

"    Random read "  574933.67 

" Mixed workload "  486711.21 

"   Random write "  395390.98 

domU:

"Record size = 4 Kbytes "
"Output is in Kbytes/sec"

"  Initial write "  133933.96 

"        Rewrite "  394235.88 

"           Read "  710423.94 

"        Re-read "  508824.84 

"   Reverse Read "  407579.28 

"    Stride read "  401205.93 

"    Random read "  410340.80 

" Mixed workload "  338249.12 

"   Random write "  309791.69 


As we can  see above in domU

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