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[Xen-users] Disk IO

To: Xen Users <xen-users@xxxxxxxxxxxxxxxxxxx>

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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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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