linux-kernel - Re: Initial report on F2FS filesystem performance

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Message-Id: <E0328919-ACAA-4052-B922-952AFA375FD8@dubeyko.com>
Date:	Sun, 21 Oct 2012 13:09:05 +0400
From:	Vyacheslav Dubeyko <slava@...eyko.com>
To:	Pavel Machek <pavel@....cz>
Cc:	Sooman Jeong <77smart@...yang.ac.kr>, linux-kernel@...r.kernel.org
Subject: Re: Initial report on F2FS filesystem performance

On Oct 20, 2012, at 11:22 PM, Pavel Machek wrote:

> On Tue 2012-10-16 13:07:03, Sooman Jeong wrote:
>> 
>> This is a brief summary of our initial filesystem performance study of f2fs against existing two filesystems in linux: EXT4, NILFS2, and f2fs.
>> 
> 
> Hmm, flashes are actually optimized for VFAT, right? Can you compare
> against that?
> 

Do you mean SD-cards? Because, as I can understand, "raw" flash (I mean NAND chip) hasn't any special filesystem-related optimization. Moreover, as I know, this optimization takes place in the begin of device (because FAT metadata is placed in the volume's begin). But if you have several partition on a device then you haven't any optimizations for second and next FAT partitions. So, in-place modified metadata of f2fs is placed in the begin of the volume also.

Or, maybe, do you mean some another special optimization for VFAT? 

> What about something more complex like "untar of kernel tree"?
> 

Yes, it is very interesting use-case. Maybe, kernel compilation can be complimentary synthetic benchmark. :-)

With the best regards,
Vyacheslav Dubeyko.

> Ouch and... thanks for doing this.
> 									Pavel     
> -- 
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