Tanya tentang IO speed


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ouh gitu yah..kemarin udah sempet chat2 dengan providernya dan memank sepertiny ada masalah dengan vps yg kvm soal io speed akhirny udah beres juga.... saya udah dapat speed yg normal :D
 
Ikutan iseng ahh ...

Disk : 4 x 1TB WDC Caviar Black 64MB 7200RPM
RAID : Software (Linux mdadm) RAID10
Sistem : Supermicro

# dd if=/dev/zero of=test.file bs=64k count=16k conv=fdatasync;rm -f test.file
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 13.7926 seconds, 77.8 MB/s
Click to expand...

Disk : 4 x 1TB WDC Caviar Black 64MB 7200RPM
RAID : Software (Linux mdadm) RAID10
Sistem : Intel Server

# dd if=/dev/zero of=test.file bs=64k count=16k conv=fdatasync;rm -f test.file
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 9.34742 seconds, 115 MB/s
Click to expand...

Disk : 2 x 1TB Seagate Constellation.2 ST91000640NS 64MB 7200RPM
RAID : Software (Linux mdadm) RAID1
Sistem : Supermicro Server

# dd if=/dev/zero of=test.file bs=64k count=16k conv=fdatasync;rm -f test.file
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 14.5631 seconds, 73.7 MB/s
Click to expand...

Note: Ketiganya dalam kondisi normal run (tidak kosong dan tidak full load/peak - 70%-80% utilized)

Semoga berguna
 
pakde perdhanahost, coba check /sys/block/XdY/queue/scheduler (dimana X = type hard disknya dan Y = "nomer" hard disknya), kayaqnya masih bisa di tweak lagi tuh software raidnya.. :D coba aja ganti cfq ke deadline atau noop di node, dan sebaliknya di vps juga..
 
ikutan cobain juga aah.. heheh, tes di salah satu vps

16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 16.5608 seconds, 64.8 MB/s
 
cpserv said:
pakde perdhanahost, coba check /sys/block/XdY/queue/scheduler (dimana X = type hard disknya dan Y = "nomer" hard disknya), kayaqnya masih bisa di tweak lagi tuh software raidnya.. :D coba aja ganti cfq ke deadline atau noop di node, dan sebaliknya di vps juga..
Click to expand...

SanDisk Ultra SSD, 60GB, SATA II

$ time sh -c "dd if=/dev/zero of=iotest bs=8k count=500000 && sync"
500000+0 records in
500000+0 records out
4096000000 bytes (4.1 GB) copied, 16.993 s, 241 MB/s

utilisasi server masih <50%

VPS berada di DS3200 IBM dengan SAS Cable 3Gps, SATA hard disk. Utilisasi hampir 70%

$ time sh -c "dd if=/dev/zero of=iotest bs=8k count=100000 && sync"

100000+0 records in
100000+0 records out
819200000 bytes (819 MB) copied, 38.219 s, 21.4 MB/s

real 0m43.270s
user 0m0.024s
sys 0m0.816s

$ cat /sys/block/sda/queue/scheduler
noop anticipatory deadline [cfq]

hmm...
 
nyoba test juga disalah satu vps

2x1 tb - raid1 software

root@template:~# dd if=/dev/zero of=iotest bs=64k count=16k conv=fdatasync
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 10.6341 s, 101 MB/s
 
ikutan nimbrung,

SAS 15000 rpm, pake esxi

[root@rhel6 tmp]# dd if=/dev/zero of=test.file bs=64k count=16k conv=fdatasync;rm -f test.file
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 4.15903 s, 258 MB/s
[root@rhel6 tmp]# time sh -c "dd if=/dev/zero of=iotest bs=8k count=500000 && sync"
500000+0 records in
500000+0 records out
4096000000 bytes (4.1 GB) copied, 12.4123 s, 330 MB/s

sekrinsut

imageshack.us/photo/my-images/443/mbuh.jpg/
 
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