[Nsi-wg] Topology section

[Radek Krzywania]

Hi,
Regarding LDAP - it does not scale. It's just simple tree structure, not a graph so we can’t model too much with that. Never heard of any mechanisms for distributed maintenance. IMHO - Pro: easy to implement, Cons: all the rest.

Best regards
Radek

___________________________________
Radoslaw Krzywania          

Network Research and Development
  Poznan Supercomputing and  
      Networking Center

radek.krzywania at man.poznan.pl
+48 61 850 25 26             

http://www.man.poznan.pl
___________________________________

> -----Original Message-----
> From: nsi-wg-bounces at ogf.org [mailto:nsi-wg-bounces at ogf.org] On Behalf
> Of Jeroen van der Ham
> Sent: Wednesday, May 30, 2012 11:59 AM
> To: John MacAuley
> Cc: NSI WG
> Subject: Re: [Nsi-wg] Topology section
> 
> Hi,
> 
> On 29 May 2012, at 16:22, John MacAuley wrote:
> 
> > Hot dang, a heated debate.  I thought everyone had fallen into a volcano
> while in Iceland.
> 
> Some of the fire from the volcanoes spurred us back to the debate indeed ;)
> 
> > I nearly swallowed my tongue when I read OSPF.  I was hoping for
> something extremely simple that would just allow me to query a peer and
> control the retrieval of what they know. Something very similar in concept to
> a protocol like LDAP where I can list the top level branches of the tree
> (available networks), then do a detailed retrieval of the contents of a subtree
> (topology for the network).  I would also like to put a watcher on a subtree to
> be notified when anything was updated.
> 
> I have no close experience with LDAP, how does it work with multiple
> distributed sources of information? What about the subtree notifications?
> 
> > I am definitely big on reuse, but if my aging memory serves me correctly,
> the last time I implemented OSPF in a product it was not a trivial task.  I need
> a bit more of trivial these days ;-)
> 
> I indeed meant an OSPF-like protocol.
> It may not be trivial, but it's a proven technology. It has some great
> extensibility features using the TLV fields.
> 
> If that's off the table, we could of course also look into peer-to-peer like
> systems. There is some great work on distributed storage using distributed
> hash tables (DHT) that may also be applicable to this situation.
> 
> Jeroen.
> 
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