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From: Vyacheslav Dubeyko <slava@dubeyko.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: Sooman Jeong <77smart@hanyang.ac.kr>, linux-kernel@vger.kernel.org
Subject: Re: Initial report on F2FS filesystem performance
Date: Sun, 21 Oct 2012 13:09:05 +0400	[thread overview]
Message-ID: <E0328919-ACAA-4052-B922-952AFA375FD8@dubeyko.com> (raw)
In-Reply-To: <20121020192215.GB555@elf.ucw.cz>


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     
> -- 
> (english) http://www.livejournal.com/~pavelmachek
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  reply	other threads:[~2012-10-21  9:09 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-16  4:07 Initial report on F2FS filesystem performance Sooman Jeong
2012-10-16  6:58 ` Namjae Jeon
2012-10-17  4:44   ` Sooman Jeong
2012-10-20 19:22 ` Pavel Machek
2012-10-21  9:09   ` Vyacheslav Dubeyko [this message]
2012-10-21 10:26     ` Pavel Machek
2012-10-22 11:36       ` Sooman Jeong
2012-10-23  0:07         ` Pavel Machek
2012-10-23 17:10           ` Vyacheslav Dubeyko
2012-10-30 15:36             ` Pavel Machek

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