[AG-TECH] Bridge availability chances.

Paul Mercer mercer at arsc.edu
Mon Apr 9 15:36:55 CDT 2007

I have noticed, at times, that I see "no bridges available" even  
though I'm running a bride on that venue.  I might have to restart  
the Venue Client several times for bridges to appear and my bridge is  
sometimes not listed.  I have extended the number of bridges listed  
to 20 and my bridge is still sometimes not shown.  Is it possible to  
have the Venue Client update the bridge list without restarting the  

On Apr 9, 2007, at 11:38 AM, Derek Piper wrote:

> 	I'm having a (possibly) similar problem with a participant in  
> Tokyo, Japan. I'm not sure of the way that bridges are chosen, but  
> it seems that from this participant's location, no bridges are  
> available at all. I'm not sure if it's firewalling or what that  
> might prevent even the LIST of bridges appearing, or what it is.
> 	Derek
> Jimmy Miklavcic wrote:
>> I'm working with Kansas University Medical Center to get a small  
>> Access  Grid node running. They most certainly don't have  
>> multicast available on their campus so we are stuck with unicast.  
>> They have a "very" stringent security policy and I'm forced to  
>> narrow down the number of bridges that they will allow through  
>> their fire wall.
>>  So the question is, if I give them a list of ten bridges, what  
>> are the chances that one or two of them will be listed in the  
>> bridge registry? Should they increase their bridge locator  
>> function from 10 to say 20 to increase their chances of seeing any  
>> of the ten? Also, if a bridge is not listed in the registry, does  
>> it mean that it is not available?
>>    -- Jimmy Miklavcic
>> Multimedia Specialist
>> Jimmy.Miklavcic at utah.edu
>> 155 SOUTH 1452 EAST RM 405
>> SALT LAKE CITY, UT 84112-0190
>> Office: 801.585.9335
>>  Fax: 801.585.5366
>> http://www.anotherlanguage.org
> -- 
> Derek Piper - dcpiper at indiana.edu - (812) 856 0111
> IRI 323, School of Informatics
> Indiana University, Bloomington, Indiana

Paul Mercer
Arctic Region Supercomputing Center
907 450 8649

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