http://www.refmanual.com/2012/11/16/measure-unix-iops/
IOPS = (MBps Throughput / KB per IO) * 1024 Or MBps = (IOPS * KB per IO) / 1024
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1.yum install tuned tuned-utils 2. tuned-adm profile virtual-guest 3. dd if=/dev/zero of=tmpfile bs=1M count=1000 See the tables below : Profile explanation : default The default power-saving profile. This is the most basic power-saving profile. It enables only the disk and CPU plug-ins. Note that this is not the same as turning tuned-adm off, where […] Refer to http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2011861 The scheduler can be set for each hard disk unit. To check which scheduler is being used for particular drive, run this command: cat /sys/block/disk/queue/scheduler For example, to check the current I/O scheduler for sda: # cat /sys/block/sda/queue/scheduler [noop] anticipatory deadline cfq In this example, the sda drive scheduler is set to […] |
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