Re: inventory

[Peter Badovinatz <tabmowzo@yahoo.com>]

--- "David L. Nicol" <david@kasey.umkc.edu> wrote:
<snip>
> It's stunning the level of not-made-here-itis that these projects
> can accumulate.
> 
> 
> Lets focus on one thing that we know all clustering schemes have, and
> see if we can standardize it, then go from there.  My nominee of a
> suitable case for this treatment remains node numbering.
> 
> Consensus appears that there is a standard file that can be read from
> to determine one's node number, or written to to change it.

I would love to see 'one way' to set/read the node number.  This would greatly
simplify my life.  In the small, I am working on a distributed lock manager
project (http://oss.software.ibm.com/developerworks/projects/dlm) that needs to
know each node's number, but, other cluster pieces, such as heartbeating,
likewise need such info.  

Right now, they only "sort of" coordinate this setting, and since we anticipate
the DLM working in many different cluster environments, I am worried about real
ugliness trying to keep this straight in all environments.

> 
> Mosix "clutters up" /proc with all of its controls and displays; and
> it has been suggested that it is preferable to define a New File System
> for a clustering architecture's controls and mount it somewhere rather
> than doing this.  I like this approach since not only does it reduce
> the amount of patching (new clusterfs instead of altered procfs) it
> trivially allows participation in multiple clusters by mounting multiple
> clusterfses at multiple places
> 
> Are all in agreeement with the above notes and ideas?

Right now we're looking to put various DLM information into /proc, but if we
have a "common" area for cluster components, we'll use it.  We're much smaller
than Mosix, but since we're not all that exciting on a single node, we only get
interesting on a cluster, and in that case if everyone gets used to looking
there for information/controls, fine here!
> 
> -- 
>                       David Nicol 816.235.1187 dnicol@cstp.umkc.edu
>                            Damn! Someone stole my book on security!
> 


=====
These have been the opinions of:
Peter R. Badovinatz -- (503)578-5530 (TL 775)
wombat@us.ibm.com/tabmowzo@yahoo.com
and in no way should be construed as official opinion of 
IBM, Corp.

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