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[Xen-users] CPU load balancing
- To: xen-users@xxxxxxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx
- From: Andreï V. Fomitchev <fomitchev@xxxxxxxx>
- Date: Wed, 23 Jul 2008 02:39:17 -0700 (PDT)
- Cc:
- Delivery-date: Wed, 23 Jul 2008 02:39:59 -0700
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Hi all.
I continue to study the XEN possibilities and currently I search a 'CPU load balancing tool' which answers the scenario below:
Configuration: using sched-credit command, the 4 DomU are the same weight and each uses only 15% of CPU.
The balancing tool monitors the DomU CPU loads and if two (or more) consecutive measures of CPU load equal to 100% of CPU and if the other domains are in Idle mode, the tool increases the Domain weight and allocates more of CPU. When the Domain terminated and "returns" to Idle, the tool returns the Domain configuration in nominal mode.
1) Because I did not find a response in XEN documentation, my first questions are "philosophical":
- this kind of tools is it interesting? Can it provide some improvements of performances on-the-fly?
2) I found some tools which manage the load balancing
of entire clusters. I think that it is possible to adapt them or their algorithm to CPU balancing but I think also that I am not the first to meet this issue... Did you read something about a tool which can answer my needs?
Thank you for your answers.
Best regards,
--
Andreï V. FOMITCHEV
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