Linux stress / speed test
DRAFT!
test disk I/O
time sh -c "dd if=/dev/zero of=ddfile bs=8k count=250000 && sync"; rm ddfile
test with hdparm direct read:
hdparm -t /dev/sda2
test with hdparm cached read :
hdparm -T /dev/sda2
Stress test memory [fill memory up to 90%]:
stress --vm-bytes $(awk '/MemFree/{printf "%d\n", $2 * 0.9;}' < /proc/meminfo)k --vm-keep -m 1
Stress test cpu/io/vm:
stress --cpu 8 --io 16 --vm 32 --vm-bytes 256M --timeout 100000000s
Stres swith hdd
stress --cpu 12 --io 8 --vm 2 --vm-bytes 512M --hdd 1 --hdd-bytes 1024K --timeout 100000000s
You can also use cpuburn utility for cpu stress test
load 1 CPU core:
dd if=/dev/zero of=/dev/null
Load more cpu cores:
fulload() { dd if=/dev/zero of=/dev/null | dd if=/dev/zero of=/dev/null | dd if=/dev/zero of=/dev/null | dd if=/dev/zero of=/dev/null & }; fulload; read; killall dd
Stress test ALL RAM (99%),CPU,VM,IO:
//example may be varied on difer systems , decrease/increase hdd, cpu, io values up to your system load; monitor with tools like atop, also suggested to run in screen for 24h
stress --vm-bytes $(awk '/MemFree/{printf "%d\n", $2 * 0.99;}' < /proc/meminfo)k --vm-keep -m 1 --cpu 16 --io 8 --hdd 32 --hdd-bytes 1024k --timeout 900000000s
Test storage with bonnie++ and use all memory, assuming we have server with 96GB RAM:
bonnie++ -u root -d /vz/ -r 96000
ssd HW raid-10 test:
[root@node1 ~]# time sh -c "dd if=/dev/zero of=ddfile bs=512k count=250000 && sync"; rm ddfile dd: writing `ddfile': No space left on device 95899+0 records in 95898+0 records out 50278379520 bytes (50 GB) copied, 54.3888 s, 924 MB/s
Also use FIO for complete IOPS test:
http://wiki.vpsget.com/index.php/Fio_iops_test_;_centos