On 29 June 2013 06:07, Christopher Samuel <[email protected]> wrote:
> On 28/06/13 18:45, Jonathan Barber wrote: > > > The problem with SSH based approaches is when you have failed nodes > > - normally they cause the entire command to hang until the attempted > > connection times out. > > xdsh in xCAT can handle that for you, passing the -v option tells it to > use the nodes status as monitored to avoid down nodes. > That's interesting, I hadn't noticed that option before. 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). Cheers > I might suggest to them an environment variable to enable that by > default, rather than having to remember to add it. > > -- > Christopher Samuel Senior Systems Administrator > VLSCI - Victorian Life Sciences Computation Initiative > Email: [email protected] Phone: +61 (0)3 903 55545 > http://www.vlsci.org.au/ http://twitter.com/vlsci > _______________________________________________ > Beowulf mailing list, [email protected] sponsored by Penguin Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf > -- Jonathan Barber <[email protected]>
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