[Swift-devel] Re: InternalHostname in sites file

[Jonathan S Monette]

Ok.  I have one I wrote up based on what Mihael mentioned.  But should we
just explain why someone would use the internalhostname key in sites.xml or
should we also explain how to tell if you need to set this value and also
here is how to find it?

On Fri, Jun 3, 2011 at 1:11 PM, David Kelly <davidkelly999 at gmail.com> wrote:

> Sure, Jon. The userguide is now kept in the docs/userguide directory of
> Swift. It's in asciidoc format. Feel free to make changes there, or email me
> the text and I can add it for you.
>
> David
>
>
> On Thu, Jun 2, 2011 at 3:10 PM, Jonathan S Monette <jonmon at utexas.edu>wrote:
>
>> I can write something up and send it to David to add somewhere for the
>> userguide.  Not sure where the files for the userguide are kept.
>>
>>
>> On Thu, Jun 2, 2011 at 3:08 PM, Michael Wilde <wilde at mcs.anl.gov> wrote:
>>
>>> Thanks for clarifying. Jon and/or David, can you address this with a
>>> cookbook entry on Coasters that heads towards a users guide section?
>>>
>>> We should tell users what they can run on their cluster (eg ping or
>>> telnet-style connect tests) to validate the setting of internalHostName.
>>>
>>> - Mike
>>>
>>>
>>>
>>> ----- Original Message -----
>>> > Right. If the head node has multiple network interfaces, only one of
>>> > which is visible from the worker nodes.
>>> >
>>> > The choice of which interface is the one that worker nodes can connect
>>> > to is a matter of the particular cluster. It's not particularly easy
>>> > to
>>> > have an automated mechanism that figures it out. We tried some scheme
>>> > to
>>> > pass all the interface addresses to the worker and let it try to
>>> > connect
>>> > to all of them in order, but that didn't work very well. Of course,
>>> > there might be a scheme that works, but I didn't want to spend too
>>> > much
>>> > time on that.
>>> >
>>> > So that's why it's needed. To clarify to the workers which exact
>>> > interface on the head node they are to try to connect to.
>>> >
>>> > Mihael
>>> >
>>> > On Thu, 2011-06-02 at 14:10 -0500, Jonathan S Monette wrote:
>>> > > Mihael,
>>> > >    I believe we have talked about this before but why is it
>>> > >    necessary
>>> > > for an InternalHostname to be specified for PADS? I know that the
>>> > > address that coasters connects to is wrong but I do not remember why
>>> > > that was. Could you give an explanation on why internalHostname
>>> > > needs
>>> > > to be set?
>>> > >
>>> > > --
>>> > >
>>> > >
>>> > > Any intelligent fool can make things bigger and more complex... It
>>> > > takes a touch of genius - and a lot of courage to move in the
>>> > > opposite
>>> > > direction.
>>> > >
>>> > > - Albert Einstein
>>> > >
>>> > >
>>> > >
>>> >
>>> >
>>> > _______________________________________________
>>> > Swift-devel mailing list
>>> > Swift-devel at ci.uchicago.edu
>>> > http://mail.ci.uchicago.edu/mailman/listinfo/swift-devel
>>>
>>> --
>>> Michael Wilde
>>> Computation Institute, University of Chicago
>>> Mathematics and Computer Science Division
>>> Argonne National Laboratory
>>>
>>>
>>
>>
>> --
>>
>> Any intelligent fool can make things bigger and more complex... It takes a
>> touch of genius - and a lot of courage to move in the opposite direction.
>>
>> - Albert Einstein
>>
>>
>> _______________________________________________
>> Swift-devel mailing list
>> Swift-devel at ci.uchicago.edu
>> http://mail.ci.uchicago.edu/mailman/listinfo/swift-devel
>>
>>
>


-- 

Any intelligent fool can make things bigger and more complex... It takes a
touch of genius - and a lot of courage to move in the opposite direction.

- Albert Einstein
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