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Re: IO scheduling [message #6912 is a reply to message #6908]

Wed, 27 September 2006 11:41

Vasily Tarasov
Messages: 1345
Registered: January 2006

Senior Member

Quote:

Could you give a short explanation why anticipatory io scheduler is used as default io scheduler in OpenVZ?

Default OpenVZ IO-scheduler is inherited from kernel on which particular OpenVZ kernel is based. For example:
1. 2.6.16-026test* and 2.6.8-022stab* are based on appropriate vanilla kernel, that use anticipatory scheduler as default (only since recent 2.6.18 vanilla kernel uses CFQ). So these OpenVZ kernels use anticipatory scheduler.
2. 2.6.9-023stab* is based on rhel4 kernel, that uses cfq as default, hence OpenVZ uses this scheduler.
...

I don't think this is fundamentally what is default IO scheduler:
you can change it any time to scheduler that best fits you!

HTH,
vass.

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[Message index]

		SOLVED IO scheduling By: dagr on Wed, 20 September 2006 18:25
		Re: IO scheduling By: Vasily Tarasov on Thu, 21 September 2006 06:43
		Re: IO scheduling By: wfischer on Wed, 27 September 2006 11:04
		Re: IO scheduling By: Vasily Tarasov on Wed, 27 September 2006 11:41
		Re: IO scheduling By: wfischer on Wed, 27 September 2006 12:17
		Re: IO scheduling By: dagr on Thu, 21 September 2006 07:22
		Re: IO scheduling By: Vasily Tarasov on Thu, 21 September 2006 08:03
		Re: IO scheduling By: HaroldB on Mon, 25 September 2006 07:05
		Re: SOLVED IO scheduling By: HaroldB on Wed, 27 September 2006 11:29

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