linux-ext4 - which IO-scheduler is best for flash based storage device with ext4

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Date:	Wed, 13 Jan 2016 06:33:28 +0000
From:	"HUANG Weller (CM/ESW12-CN)" <Weller.Huang@...bosch.com>
To:	Jan Kara <jack@...e.cz>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
Subject: which IO-scheduler is best for flash based storage device with ext4

Hi,

Could you tell me which  IO-scheduler is best for flash based storage device with ext4 ?
Just search from WWW, I saw it is said that the noop is best because the CFQ is design for the mechanical hard disk.
And I did the performance test with IOzone between the IO-scheduler noop and cfq. The performance difference is small.
So here I want to get some answer from you about this question.

Thanks.
Huang weller

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