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Subject:

Re: Fwd: Collecting input for the networking session at the WLCG workshop

From:

Duncan Rand <[log in to unmask]>

Reply-To:

Testbed Support for GridPP member institutes <[log in to unmask]>

Date:

Thu, 29 Sep 2016 13:49:28 +0100

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (103 lines)

Hi Jeremy

Yes, I can do that. I already have one response, please could other 
sites send me their replies.

cheers
Duncan

On 28/09/2016 20:27, Jeremy Coles wrote:
> Dear All,
>
> As I cannot see to whom this message has gone I thought it worth
> forwarding to the list. It would be useful to compile a GridPP response
> between those who are most interested in the questions raised. Duncan,
> perhaps this is something you may like to lead please?
>
> Many thanks,
> Jeremy
>
>
>
>> Begin forwarded message:
>>
>> *From: *Tony Cass <[log in to unmask] <mailto:[log in to unmask]>>
>> *Subject: **Collecting input for the networking session at the WLCG
>> workshop*
>> *Date: *28 September 2016 20:12:58 GMT+1
>> *Cc: *Shawn Mc Kee <[log in to unmask] <mailto:[log in to unmask]>>,
>> Edoardo Martelli <[log in to unmask]
>> <mailto:[log in to unmask]>>, Marian Babik <[log in to unmask]
>> <mailto:[log in to unmask]>>
>>
>> Dear Colleagues and WLCG Workshop attendees,
>>
>> To help encourage productive discussions during the networking
>> session, we’d like to circulate some thoughts and questions
>> beforehand. On the thoughts side, we see networking issues on varying
>> time horizons as:
>>
>> -          Short term (the rest of Run2): can we cope with the extra
>> load due to the better than expected LHC performance? Can we be IPv6
>> ready? Can we monitor, diagnose and manage our networks sufficiently
>> for HEP needs?
>> -          Medium term (LS2/Run 3): Upgrading the networks for Run 3;
>> moving towards complete availability of data over IPv6. How do we
>> integrate Software Defined Networking capabilities that exist in our
>> networks to support our needs?
>> -          Long term (HL-LHC): Do we influence the international
>> network environment or live in an environment built for more demanding
>> customers? To frame this another way,  will HEP continue to enjoy
>> abundant bandwidth and prioritised attention or will we need to adapt
>> to an environment filled with other network intensive science domains
>> competing for the network?
>>
>> In the background there is also the issue of integrating commercial
>> cloud resources into our networking infrastructure. For this, though,
>> we imagine that you (and especially the experiments) just want the
>> network engineers to “make it work” rather than to have any detailed
>> discussion of the issues at the workshop.
>>
>> With this in mind, we’ve scheduled talks on IPv6, network technology
>> evolution and LHCOPN/LHCONE status.
>>
>> In terms of questions, we would like to ask
>>
>> Sites
>> ====
>> -          What fraction of your LAN capacity is used? What fraction
>> of your WAN capacity?
>> -          On what timescale will you upgrade your LAN? Your WAN?
>> -          If you don’t have an upgrade planned, what are you waiting for?
>> o   Money?
>> o   Increased traffic?
>> o   Guidance?
>>
>> Experiments
>> ==========
>> -          What bandwidths (LAN & WAN) should Tier-1 and Tier-2 sites
>> be targeting for Run3? HL-LHC?
>> -          Do you want Tier2 sites to separate clearly into ones with
>> disk and ones without? Will networking infrastructure influence the
>> choice or have to be adapted to a choice that is made for other reasons?
>> -          Will there be an experiment focused update of the Bos/Fisk
>> networking document (http://lhcone.web.cern.ch/node/2935)? If so, when?
>>
>> Both
>> ====
>> -          What obstacles do you see preventing you migrating to an
>> IPv6 only environment?
>>
>> Please send answers to these questions as well as any comments or
>> thoughts to us ([log in to unmask]
>> <mailto:[log in to unmask]>, [log in to unmask]
>> <mailto:[log in to unmask]>) by noon Geneva time on Thursday 6^th
>>  October and we’ll use the input to organise the session. Bonus! If we
>> get lots of input, you won’t have to sit through presentations of
>> material available to read on Indico!
>>
>> Regards — and apologies if you receive two copies of this mail,
>> Tony & Shawn
>> Network Session co-chairs
>

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