<div dir="ltr">On 29 June 2013 06:07, Christopher Samuel <span dir="ltr"><<a href="mailto:samuel@unimelb.edu.au" target="_blank">samuel@unimelb.edu.au</a>></span> wrote:<br><div class="gmail_extra"><div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">On 28/06/13 18:45, Jonathan Barber wrote:<br>
<br>
> The problem with SSH based approaches is when you have failed nodes<br>
> - normally they cause the entire command to hang until the attempted<br>
> connection times out.<br>
<br>
</div>xdsh in xCAT can handle that for you, passing the -v option tells it to<br>
use the nodes status as monitored to avoid down nodes.<br></blockquote><div><br></div><div style>That's interesting, I hadn't noticed that option before.</div><div style><br></div><div style>Looking at what it does, the argument causes xcat to run "nmap -PE" (i.e. does an ICMP echo request to the host) before connecting. So it will also hang if the sshd blocks for some reason (such as with my past NFS woes).</div>
<div style><br></div><div style>Cheers</div><div style><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
I might suggest to them an environment variable to enable that by<br>
default, rather than having to remember to add it.<br>
<div class="im HOEnZb"><br>
--<br>
Christopher Samuel Senior Systems Administrator<br>
VLSCI - Victorian Life Sciences Computation Initiative<br>
Email: <a href="mailto:samuel@unimelb.edu.au">samuel@unimelb.edu.au</a> Phone: <a href="tel:%2B61%20%280%293%20903%2055545" value="+61390355545">+61 (0)3 903 55545</a><br>
<a href="http://www.vlsci.org.au/" target="_blank">http://www.vlsci.org.au/</a> <a href="http://twitter.com/vlsci" target="_blank">http://twitter.com/vlsci</a><br>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br>Jonathan Barber <<a href="mailto:jonathan.barber@gmail.com">jonathan.barber@gmail.com</a>>
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