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Vitesse d'écriture et de lecture ?


hanico
09/09/2012, 23h08
Sur mon VPS4 :

#hdparm -t -T /dev/sda

/dev/sda:
Timing cached reads: 5174 MB in 2.00 seconds = 2591.26 MB/sec
Timing buffered disk reads: 260 MB in 3.00 seconds = 86.58 MB/sec

#dd if=/dev/zero of=test.data bs=4k count=128k
131072+0 enregistrements lus
131072+0 enregistrements écrits
536870912 octets (537 MB) copiés, 8,51049 s, 63,1 MB/s

# ./seeker /dev/sda
Seeker v2.0, 2007-01-15, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda [51200MB], wait 30 seconds............................
Results: 158 seeks/second, 6.32 ms random access time

# ./ioping /dev/sda
--- /dev/sda (device 50.0 Gb) ioping statistics ---
401 requests completed in 423406.7 ms, 18 iops, 0.1 mb/s
min/avg/max/mdev = 0.4/55.0/2077.2/194.7 ms


J'ai un ticket ouvert sur les performances d'IO de mon serveur car c'est vraiment pas terrible...

pyv001
14/08/2012, 12h19
Sur un VPS3

Code:
#dd if=/dev/zero of=test.data bs=4k count=128k
131072+0 records in
131072+0 records out
536870912 bytes (537 MB) copied, 4.95293 s, 108 MB/s

#hdparm -t -T /dev/sda

/dev/sda:
 Timing cached reads:   11236 MB in  2.00 seconds = 5626.59 MB/sec
 Timing buffered disk reads:  310 MB in  3.01 seconds = 103.11 MB/sec

fritz2cat
12/08/2012, 20h47
rps1:
Code:
dd if=/dev/zero of=test.data bs=4k count=128k
131072+0 records in
131072+0 records out
536870912 bytes (537 MB) copied, 49.8094 s, 10.8 MB/s
# hdparm -t -T /dev/sda

/dev/sda:
 Timing cached reads:   778 MB in  2.00 seconds = 389.01 MB/sec
 Timing buffered disk reads:   12 MB in  3.38 seconds =   3.55 MB/sec
vps chez Leaseweb:
Code:
# dd if=/dev/zero of=test.data bs=4k count=128k
131072+0 records in
131072+0 records out
536870912 bytes (537 MB) copied, 6.40097 s, 83.9 MB/s
# hdparm -t -T /dev/sda

/dev/sda:
 Timing cached reads:   12784 MB in  1.98 seconds = 6442.08 MB/sec
 Timing buffered disk reads:  24 MB in  3.01 seconds =   7.99 MB/sec
vKS chez OVH:
Code:
# dd if=/dev/zero of=test.data bs=4k count=128k
131072+0 records in
131072+0 records out
536870912 bytes (537 MB) copied, 8.4377 s, 63.6 MB/s

(hdparm n'est pas supporté sur un dev de type simfs)
Je n'ai pas de vps chez OVH.

Frédéric

starouille
12/08/2012, 16h20
pensez à supprimer test.data après

dededede4
12/08/2012, 00h19
Bonjour,
Pourriez-vous m'indiquer la vitesse de lecture/écriture de votre VPS ?

dd if=/dev/zero of=test.data bs=4k count=128k
hdparm -t -T /dev/sda

Merci beaucoup !