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Rychlost disku


Liquid
02-28-2012, 10:23 AM
Kimsufi Limitovaná edice 2012 Procesor IntelE8400 2x750GB sata

/dev/sda:
Timing cached reads: 14450 MB in 2.00 seconds = 7232.54 MB/sec
Timing buffered disk reads: 248 MB in 3.01 seconds = 82.52 MB/sec

/dev/sdb:
Timing cached reads: 12782 MB in 2.00 seconds = 6397.77 MB/sec
Timing buffered disk reads: 248 MB in 3.00 seconds = 82.62 MB/sec

Liquid
02-21-2012, 09:10 AM
Nový Kimsufi 2G 2012...

hdparm -tT /dev/sda

/dev/sda:
Timing cached reads: 1672 MB in 2.00 seconds = 835.47 MB/sec
Timing buffered disk reads: 358 MB in 3.01 seconds = 118.78 MB/sec

lubos
10-12-2009, 12:18 PM
Zdá se, že všichni máte rychlost +/- v normě, všichni sda namísto hda. Kdyby to někomu blbnulo moc, zkuste si ověřit verzi kernelu (uname -r) - když je moc starý, nepodporuje SATA disky a je třeba ho updatnout... Tam bude pravděpodobně i tomvomův problém.

Kumar
10-12-2009, 11:49 AM
/dev/sda:
Timing cached reads: 1088 MB in 2.00 seconds = 543.39 MB/sec
Timing buffered disk reads: 120 MB in 3.02 seconds = 39.68 MB/sec

Lecco
10-11-2009, 10:07 AM
Kimsufi :

hdparm -d

HDIO_GET_DMA failed: Inappropriate ioctl for device

hdparm -tT

cached reads : 480-495MB/s
buffered reads : 40-50MB/s

karel
10-06-2009, 06:11 PM
SP:
Kód:
/dev/sda:
 Timing cached reads:   6908 MB in  2.00 seconds = 3450 MB/sec
 Timing buffered disk reads:  202 MB in  3.01 seconds =  65 MB/sec
(průměr několika měření, za normálního provozu)

Výsledky zhruba odpovídají použitému HW (předpokládám běžné disky, žádný extra řadič atd.)

Pro srovnání, Thinkpad, 5400 RPM, LVM+dm-crypt a nad tím teprve cokoliv dalšího:
Kód:
/dev/sda:
 Timing cached reads:   3328 MB in  2.00 seconds = 1664.28 MB/sec
 Timing buffered disk reads:  160 MB in  3.01 seconds =  53.08 MB/sec

tomvom
10-06-2009, 02:28 PM
ns:~# hdparm -tT /dev/hda

/dev/hda:
Timing cached reads: 5866 MB in 2.00 seconds = 2934.81 MB/sec
Timing buffered disk reads: 10 MB in 3.35 seconds = 2.98 MB/sec

Kenji
10-06-2009, 06:50 AM
EG AMD:
Timing cached reads: 3096 MB in 2.00 seconds = 1548.19 MB/sec
Timing buffered disk reads: 300 MB in 3.01 seconds = 99.75 MB/sec

Kimsufi:
Timing cached reads: 1182 MB in 2.00 seconds = 590.33 MB/sec
Timing buffered disk reads: 210 MB in 3.01 seconds = 69.70 MB/sec

lubos
10-05-2009, 01:48 PM
Podpora má momentálně "keine Ahnung", ale jak jsem psal v e-mailu (vám, že?), zkuste nejprv restartovat v rescue módu a udělat hw test -> pošlete screenshoty.

Mně moje kimsufi sype tohle:
=====================================
admin@ks354308:~$ sudo hdparm -d /dev/hda

/dev/hda:
using_dma = 1 (on)

admin@ks354308:~$ sudo hdparm -tT /dev/hda

/dev/hda:
Timing cached reads: 1062 MB in 2.00 seconds = 530.57 MB/sec
Timing buffered disk reads: 186 MB in 3.02 seconds = 61.56 MB/sec


Stolní PC sype tohle:
=====================================
DMA to nemá (HDIO_GET_DMA failed: Inappropriate ioctl for device)

lubos@lubos-desktop:~$ sudo hdparm -tT /dev/sda

/dev/sda:
Timing cached reads: 1446 MB in 2.00 seconds = 722.47 MB/sec
Timing buffered disk reads: 74 MB in 3.07 seconds = 24.10 MB/sec


Kolik to sype vám?

tomvom
10-04-2009, 06:11 PM
Dobry den vsichni,

mohl bych Vas poprosit, abyste na svych serverech zkusili nasledujici prikazy?

mate disky /dev/hda nebo /dev/sda? zmente podle potreby:

"hdparm -d /dev/hda" - je vystupem prikazu using_dma = 1 nebo 0?

"hdparm -tT /dev/hda" - jake jsou rychlosti disku?

Snazim se prijit na problem s pomalymi disky na MG Best Of serveru ktery mame...Diky

Pokud podpora OVH vi, rad uslysim v cem je problem :-)