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revised HP DL380 G7 + Smart Array P410i + sysbench -> poor raid 10 performance
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accepted HP DL380 G7 + Smart Array P410i + sysbench -> poor raid 10 performance
May
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comment HP DL380 G7 + Smart Array P410i + sysbench -> poor raid 10 performance
I changed scheduler from cfq to noop, and benchmark results dramatically increased! )) Now sysbench shows for me 1500+ random reads / second ... Big, big thanks :)
May
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comment HP DL380 G7 + Smart Array P410i + sysbench -> poor raid 10 performance
Sorry, my bad. Command line: /usr/sbin/bonnie++ -c 16 -n 0
May
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comment HP DL380 G7 + Smart Array P410i + sysbench -> poor raid 10 performance
I am simulating PostgreSql database, that internally uses 4kb blocks. My app makes a lot of random reads/writes on big data files ( app stopped at the time of test )
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revised HP DL380 G7 + Smart Array P410i + sysbench -> poor raid 10 performance
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comment HP DL380 G7 + Smart Array P410i + sysbench -> poor raid 10 performance
Thanks for detailed answer! Your results are awesome ... >> I don't typically use LVM, especially with the flexibility offered by the HP RAID controllers What kind of flexibility do you mean? >> What is your RAID controller cache ratio? 75/25, default) >> I think the problem is deeper than that... yup! I appended bonnie++ v1.96 results at the end of my main post. It seems results are not so good :( At first i'll try to get away from LVM and run the test again. If it won't help - i suppose, there is something wrong with raid controller.
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comment HP DL380 G7 + Smart Array P410i + sysbench -> poor raid 10 performance
hpacucli says, that strip size is 256k. DM-x devices from iostat are not physical drives, but lvm partitions. DM-7 is 60gb lvm partition, where i ran sysbench.
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asked HP DL380 G7 + Smart Array P410i + sysbench -> poor raid 10 performance