Thanks， but i am not quite understand how to determine weather monitor overloaded？ and if yes，will start several monitor help？
发自我的 iPhone
在 2013-5-15，23:07，"Jim Schutt" <jaschut@xxxxxxxxxx> 写道：
> On 05/14/2013 09:23 PM, Chen, Xiaoxi wrote:
>>> How responsive generally is the machine under load? Is there available CPU?
>> The machine works well, and the issued OSDs are likely the same, seems because they have relative slower disk( disk type are the same but the latency is a bit higher ,8ms -> 10ms).
>>
>> Top show no idle % but still have 30+% of io_wait, my colleague educate me that io_wait can be treated as free.
>>
>> Another information is offload the heartbeat to 1Gb nic doesn't solve the problem, what's more, when we doing random write test, we can still see this flipping happen. So I would like to say it may related with CPU scheduler ? The heartbeat thread (in busy OSD ) failed to get enough cpu cycle.
>>
>
> FWIW, also take a close look at your monitor daemons, and
> whether they show any signs of being overloaded.
>
> I frequently see OSDs wrongly marked down when my
> mons cannot keep up with their workload.
>
> -- Jim
>
>
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