Le 29/03/10 18:48, Olivier Le Cam a écrit :
Bonjour Aurélien,
Aurelien ROUGEMONT wrote:
r...@test4:/var/www# dd if=/dev/zero of=./test count=10000 bs=1024
10000+0 records in
10000+0 records out
10240000 bytes (10 MB) copied, 17.8632 s, 573 kB/s
I have posted the exact same results just a few days ago (using the
sid package backported to lenny):
http://gluster.org/pipermail/gluster-users/2010-March/004240.html
BTW, this seems to be related to the block size. Performances might be
very different with different block sizes:
gl2:/web-nunki# dd if=/dev/zero of=./test count=10000 bs=2000
10000+0 enregistrements lus
10000+0 enregistrements écrits
20000000 bytes (20 MB) copied, 3,25723 s, 6,1 MB/s
gl2:/web-nunki# dd if=/dev/zero of=./test count=10000 bs=10000
10000+0 enregistrements lus
10000+0 enregistrements écrits
100000000 bytes (100 MB) copied, 3,30255 s, 30,3 MB/s
gl2:/web-nunki# dd if=/dev/zero of=./test count=10000 bs=40000
10000+0 enregistrements lus
10000+0 enregistrements écrits
400000000 bytes (400 MB) copied, 5,97635 s, 66,9 MB/s
gl2:/web-nunki# dd if=/dev/zero of=./test count=10000 bs=80000
10000+0 enregistrements lus
10000+0 enregistrements écrits
800000000 bytes (800 MB) copied, 9,12432 s, 87,7 MB/s
gl2:/web-nunki# dd if=/dev/zero of=./test count=10000 bs=160000
10000+0 enregistrements lus
10000+0 enregistrements écrits
1600000000 bytes (1,6 GB) copied, 15,0147 s, 107 MB/s
gl2:/web-nunki# dd if=/dev/zero of=./test count=10000 bs=320000
10000+0 enregistrements lus
10000+0 enregistrements écrits
3200000000 bytes (3,2 GB) copied, 28,8645 s, 111 MB/s
TBH, I don't know what to conclude from these results.
Regards,
Bonsoir Olivier,
I did not have the time to write a proper addendum to my earlier emails.
I came to the very same conclusions. And I am now in front of some
questions like :
will this be ok for a web servers farm ?
what dies it mean ? What is the most common bs= equivalent for a www
server ? Do i have to change the block size of the underlying filesystem ?
(by the way, i've managed to get the same results with an opensolaris
2009.06 + glusterfs 3.0.3)
I would be glad to get some more explanations about this
Thank you all for taking the time to answer to my wonderings.
Best regards,
Aurélien
!DSPAM:4bb12b3b212821458925448!
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