[AG-TECH] Disconnections (was: AG bridge woes)

[Christoph Willing]

On 03/11/2008, at 10:15 AM, Gurcharan S. Khanna wrote:

> all,
>
> i have to agree with jeremy's point, that to the outside world and  
> the 'powers that be',
> that this kind of behavior makes AG look unstable, unreliable, and  
> dubious to invest in.
> it's certainly something that ought to rise in priority to 'fix' as  
> otherwise it will remain an
> obstacle to wider acceptance and even funding.
>
> on a related note, i continue to experience venue clients needing  
> to be restarted or venues
> re-entered every day or so. i leave my nodes up and in the venue  
> 24/7 in public places but
> that means as likely as not, the public sees error messages instead  
> of nice video. i too have
> started to re-started the whole machine to make sure it's up and  
> running, but this is surely
> a workaround to a more basic problem that the system is not robust  
> or reliable. it's especially
> difficult since i have 6-7 nodes on campus and am trying to deploy  
> more.


Gurcharan,

I believe this particular issue of VenueClients disconnecting (or  
being disconnected) can be fixed by upgrading to accessgrid3.2. Our  
UQVislab node which is up 24/7 has never had this problem since  
running the 3.2 version. On the other hand, 2 other machines in a  
special test environment and still running 3.1 are regularly  
disconnected. I've just now updated one of them to 3.2 to try to  
confirm that the issue is fixed after upgrading; I'm pretty confident  
though.


chris


> anything we can do to address and fix this would surely help AG  
> survive and thrive.
>
> -gurcharan
>
> Jason Bell wrote:
>> G'day Jeremy
>>
>> I honestly cannot explain why I need to do "regular" restarts, I just
>> find that if I do, the bridge is more stable and more reliable.
>>
>> For us, it is better that every time a person wants to connect to the
>> bridge, that the bridge is up and running.
>>
>> Sorry I cannot be anymore helpful!
>>
>> Thanks,
>> Jason.
>>
>> -----Original Message-----
>> From: Jeremy Mann [mailto:jeremymann at gmail.com] Sent: Monday, 3  
>> November 2008 09:48 AM
>> To: Jason Bell
>> Cc: ag-tech at mcs.anl.gov
>> Subject: Re: [AG-TECH] AG bridge woes
>>
>> On Sun, Nov 2, 2008 at 6:06 PM, Jason Bell <j.bell at cqu.edu.au> wrote:
>>
>>> G'day Jeremy
>>>
>>> For my personal AG bridge, I have a "cron" job that restarts the
>>>
>> bridge
>>
>>> every night.
>>>
>>> I am also in the process of assisting to setup a number of bridges
>>> around Australia and I am experimenting restarting the bridges just
>>>
>> once
>>
>>> a week.
>>>
>>
>> Thanks Jason, but is that really acceptable? While I don't have a
>> problem with restarting the bridge, but boss deems this unacceptable
>> and will probably drop our bridge service. If you can give me some
>> points I can show him, like why it's necessary to restart each day,
>> why it drops connections to the peer registry, etc... I would be
>> greatly appreciated.
>>
>>
>>
>
>
> -- 
> -------------------------
> Gurcharan S. Khanna, Ph.D.
> Director of Research Computing
> Office of the Vice President for Research
> http://rc.rit.edu
>
> Assistant Research Professor, Ph.D. Program
> Golisano College of Computing and Information Sciences
> http://people.rit.edu/gskpop
>
> Director, Interactive Collaboration Environments Laboratory,
> Center for the Advancing the Study of Cyberinfrastructure
> http://icelab.rit.edu
> ---
> Rochester Institute of Technology
> 1 Lomb Memorial Drive
> Rochester, New York 14623-5603
> Phone: 585-475-7504  ~  Cell: 585-451-8370
> Email: gurcharan.khanna at rit.edu
>

Christoph Willing                        +617 3365 8350
QCIF Access Grid Manager
University of Queensland