USE AT YOUR OWN RISK AIOMGR aiomgr.noContinueOnFailure aiomgr.numThreads aiomgr.simple aiomgr.unbuf ANSWER answer.msg.serial.disconnect BIOS bios.bootDelay bios.bootDeviceClasses bios.bootOrder bios.bootRetry.delay bios.bootRetry.enabled bios.forceSetupOnce bios.hddOrder CBTMOTION (Change Block Tracking) cbtmotion.compareDisks
Boot new machine with CENTOS LiveCD. Creating swap, boot and root partition fdisk /dev/sda # create swap n p 1 enter +16G # create boot
# stop iptables /etc/init.d/iptables stop # remove all rules iptables -F iptables -X iptables -t nat -F iptables -t nat -X iptables -t mangle -F
# if you have EPEL in your yum repo: yum -y install systester-cli # else install from source: yum -y groupinstall ‘Development Tools’ yum -y
time dd if=/dev/zero of=/shopcvs/tmp/test.img bs=1M count=2k conv=fdatasync 2048+0 records in 2048+0 records out 2147483648 bytes (2.1 GB) copied, 2.71921 s, 790 MB/s real 0m2.840s user
You should try to change the IO scheduler to deadline or noop, and test for a couple of days. The default CFQ scheduler is performing
echo deadline > /sys/block/sda/queue/scheduler To activate it after booting: echo “echo deadline > /sys/block/sda/queue/scheduler” >> /etc/rc.local
dmidecode –type memory # dmidecode 2.11 SMBIOS 2.7 present. Handle 0x1000, DMI type 16, 23 bytes Physical Memory Array Location: System Board Or Motherboard Use: