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[Xen-users] About the time of live migration, it is too long

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: "Yin Xu" <ronee.9@xxxxxxxxx>
  • Date: Thu, 29 May 2008 22:09:05 +0800
  • Delivery-date: Thu, 29 May 2008 07:09:36 -0700
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>

I am currently doing some research about the live migration feature of xen. It is said that the downtime can be less than 1 sec. But I can not get this result. I being the live migration ,and "ping" the guest IP,and found the total down is more than 30 seconds. Than I tried migration without live it only stop about 15 minutes!
So I am really puzzled about the result, why this happen?
By the way, my system configuration is:
The source server: cpu:Intel(R) Xeon(TM) CPU 2.40GHz Mem:512M(I also try with Intel(R) Pentium(R) D CPU 2.80GHz Mem 512M, the same as the dest server)
The dest server: Intel(R) Pentium(R) D CPU 2.80GHz Mem 512M
the guest os:Mem 128
all the operation system kernel is 2.6.18, the xen is 3.1.1, installed with centos5
All the machine is interconnected by a 1 Gbps Ethernet switch
I am not sure am I describe my situation clearly. Any question about my environment is welcome.
And any suggestion is welcome, thanks.

Yin Xu(ronee)
Information Security
Department of Computing and Information Technology
Fudan University
Shanghai, P.R.C.
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