Yes sir, you are right. I have successfully installed PCP in another node, say
compute node B, which can poll head node A. But head node A can not poll
compute node B. That means some network services in compute node B is not open.
But I can still use ssh and sftp to connect the two nodes. I am not sure what
service it is to accept PCP connection request.
Thank you very much for your help. I am really grateful.
Best regards.
Jie Xu
Quoting Max Matveev <makc@xxxxxxx>:
> >>>>> "jxu" == Jie Xu <jxu004@xxxxxxxxxx> writes:
>
>
> jxu> I am a graduate student in Louisiana Tech Univeristy currently
> jxu> doing research on cluster monitoring. I am investigating the
> jxu> monitoring capabilities provided by PCP. I have installed PCP on
> jxu> three machines, PMCD in every machine is up and running. But if
> jxu> I want to poll metric from other two machines, it won't work.
> jxu> The log says no route to the host, connection refused.
> jxu> eg. From host haoscar, type following command:
> jxu> #pminfo -h oscarnode1 kernel
>
> Make sure that you can get from haoscar to oscarnode1 - quite often
> cluster setup would only allow head-compute node communication but not
> compute-compute node. Try ping or telnet to confirm that you can talk
> between the two. If this works, check /var/pcp/config/pmcd/pmcd.conf
> for any [access] configuration. Check which port pmcd is using. If
> nothing helps, then come back.
>
> max
>
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