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Re: btrfs: twice as fast as ext4

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____/ Lusotec on Friday 19 Aug 2011 19:57 : \____

> Homer wrote:
>> Just tried btrfs for the first time here, albeit on an ancient PC, but
>> it's the ratios that piqued my interest.
>> ext4 -> ext4:
>> rsync -v --progress /home/homer/videos/big_buck_bunny_720p_h264.mp4 /tmp
>> big_buck_bunny_720p_h264.mp4
>>    c 100%    9.92MB/s    0:00:40 (xfer#1, to-check=0/1)
>> btrfs -> btrfs:
>>  rsync -v --progress /mnt/test1/big_buck_bunny_720p_h264.mp4 /mnt/test2
>> big_buck_bunny_720p_h264.mp4
>>    416808280 100%   18.37MB/s    0:00:21 (xfer#1, to-check=0/1)
>> That's twice as fast on the same drive.
>> Holy shit!
>>    "WARNING! - Btrfs Btrfs v0.19 IS EXPERIMENTAL
>>     WARNING! - see http://btrfs.wiki.kernel.org before using"
> Copying just 400 MiB will not give you an accurate measure because of the
> cache. Try the same test on a good number of files and directories with
> several times the memory size of the machine. Then you will get a more
> realistic comparison of the file systems' performance.
> Regards.

Recently, on a friend's machine, she deleted about 200 files from a USB key
under Windows, Time taken: over a minute. In Linux: 2 seconds.

Why should Homer not also add Windows to the comparison. It would be fun!

- -- 
		~~ Best of wishes

Dr. Roy S. Schestowitz (Ph.D. Medical Biophysics), Imaging Researcher
http://Schestowitz.com  | GNU/Linux administration | PGP-Key: 0x74572E8E
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