topic Re: ping interval in HP-UX in Operating System - HP-UX

ping interval in HP-UX

Shabahang — Tue, 11 Sep 2007 11:06:23 GMT

i have a block lost problem on 10gR2 rac cluster.
Cluster wait is abnormally high on one of the 2 nodes.
i wanna check the interconnect connectivity, by a ping flood. but cant put a ping with a small Interval.
command (ping -I host )
accepts only integer .
please help me with my test.
1- any other idea with connectivity test
2- how to recude the interval value

Re: ping interval in HP-UX

Steven E. Protter — Tue, 11 Sep 2007 11:38:28 GMT

Shalom,

Linux ping might be a better tool here.

It has a -f flag that really floods the network.

I'm not sure ping with hpux can do what you need it to do.

SEP

Re: ping interval in HP-UX

rick jones — Wed, 12 Sep 2007 11:28:56 GMT

Statistically speaking, just using a normal one second interval and waiting for two minutes should give similar results.

Have you already looked at netstat and lanadmin statistics on the cluster node?

You could I suppose download netperf (www.netperf.org) and then ./configure --enable-histogram and run a ten second TCP_RR test between the suspect node and some other system with a verbosity of 2:

netperf -H -t TCP_RR -v 2

and then look at the resulting round-trip time histogram. Those that are >> the average RTT will likely have been retransmitted one or more times.

Re: ping interval in HP-UX

Shabahang — Wed, 02 Mar 2011 04:46:30 GMT

Tnx ,