HyperFabric configuration

[marie-noelle jeanson_1]

Marius,

I talked to the lab who was puzzled by your case. Here is what I got from their analysis: not sure it will clarify your problem...

HyperFabric uses gethostbyname() to retrieve the Node Name information (Hostname & all the aliases for that Host). gethostbyname() depends on the configuration specified in nsswitch.conf. With the Node Host Name Expansion Product Bundle, HyperFabric will support 63 char hostnames.

In some cases, clic_probe is unable to connect to the HF deamon. One case is when clic_start was not executed. Another one is if the HyperFabric subsystem doesn't find the Node Name specified in clic_probe. This may happen if a Node has a 'primary' hostname & an alias associated with it and if nsswitch.conf is configured to lookup only files, then, assuming /etc/hosts mentions only the 'primary' hostname, HyperFabric will not be aware of the alias. In this case, clic_probe may return "Host not Found" or something similar when using the alias.

I am not familiar with this nsswitch.conf myself,

Regards,

Marie

[Marius Pana_1]

Thanks for the inquiry!

nsswitch.conf is configured to use files (/etc/hosts which contains entries for the official hostname and the alias for the IP assigned to clic0) then dns. In my case only the official hostname of the machine is registered in DNS. I could try to register the interconnect clic0 interface in dns and see if that changes anything.

I am pretty much convinced that this is normal behavior but it is strange that clic_probe does not find it. I will try to register it in DNS in see if that changes anything.

As for the hostname being too long I changed them all to contain a maximum of 8 characters.

Thanks for the feedback.

Marius