Hi Les,
Some very late comments...
> -----Original Message-----
> From: [log in to unmask]
> [mailto:[log in to unmask]] On
> Behalf Of Cottrell, Les
> Sent: Wednesday, August 23, 2006 11:47 AM
> To: Su, Dong; Yang, Wei; atlas-sccs-planning-l
> Cc: iepm-l
> Subject: RE: Tier 2 web page
>
> Thanks, I found for the US: Boston U, Harvard U, Chicago U,
> Indiana U, Univ Texas at Arlington, Oklahoma U, Univ of New
> Mexico, Langston U, and I think SLAC, UCSD and LBNL should be
We can drop UCSD. It is not part of ATLAS. [I assume we are talking here only about the Tier 2 web page here, not the overall list of sites to monitor. That should of course have UCSD.]
> added, plus BNL & CERN. Are there others?
It may be interesting to add the so-called western community, i.e. the people who are mentioned in our T2 proposal:
LBNL (you have that already)
UCSC
Irvine
Oregon
Washington
Arizona
Wisconsin
>
> I can start with those. Maybe later if there is interest I
> can add other country Tier 1 & 2s.
>
> I need hosts at those sites that will respond to pings.
> Typically I use the web server. However pings are often
> blocked. Looking at the web servers Univ Texas at Arlington
> (www.uta.edu), Univ of New Mexico (www.unm.edu) and LBL
> (www.lbl.gov) all block pings, the others are OK. For LBL I
> can use ns1.lbl.gov, and for Univ Texas at Arlington I can
> use ns1.uta.edu. So I need someone to give me the name of a
> host at UNM that is always up and responds to pings. Do you
> have a contact I can work with?
>
> Currently we do not monitor any of these sites (we do monitor
> SDSC which is on the UCSD campus) using PingER (see
> http://www-iepm.slac.stanford.edu/pinger/), so we will need
> to add them to the list of hosts to be monitoted and also
> assign an ATLAS group to them. We could also add making
> traceroutes to them at 10 min intervals to assist in
> diagnosing problems/events. The goal if we do this is to
> enable long term tracking and visualization of simple
> performance measures between SLAC and the other sites. This
> can be very valuable for detecting when something changed to
> see if it correlates with a user perception of degraded
> performance. We are also working on detecting anomalous
> events on the end-to-end paths by analyzing the time series
> for changes. We will be looking for persistent events as
> opposed to momentary changes in performance due to say
> congestion. Apart from complete loss of connectivity, due to
> the low frequency of measurements (at 30 minute intervals in order to!
> limit
> network load) the events (step changes in performance seen in
> the time series) will be detected several hours after they
> occur. Emails can be sent to interested paries. Once we have
> some results (e.g. measurements going back a month or so,
> then we can add a pointer to the SLAC ATLAS Tier 2 web site.
>
> There is an ATLAS group already for PingER. It includes: BNL,
> UCSD, CERN, TRIUMF, ITEP (Russia), RAL, LFN.INFN among
> others. One way to view the existing results is to go to
> http://www-iepm.slac.stanford.edu/cgi-wrap/pingtable.pl?file=p
> acket_loss&by=by-node&size=100&tick=monthly&from=WORLD&to=ATLA
S&ex=none&dataset=hep&percentage=any One can choose other metrics (RTT, loss etc.) > from there plus other time ticks (aggregated hourly, monthly,
> daily etc.) for the data, monitoring sites and remote sites
> or groups of sites.
Many sites on this page are not ATLAS, e.g FNAL, Caltech. I guess someone decided it would be interesting to ATLAS people to monitor them? Ah, maybe these sites belong on the "World" side of "ATLAS seen from World". Cheers.
Charlie
>
> Is this of interest to the SLAC ATLAS community? It's not a
> lot of work, but if nobody cares then probably we should not
> embark on it or put it on some back-burner. From my viewpoint
> I would like to do it, I believe it will be useful and give
> PingER more exposure, but will need assistance to answer
> questions, add links, etc. from the SLAC ATLAS community.
>
> -----Original Message-----
> From: Su, Dong
> Sent: Wednesday, August 23, 2006 10:20 AM
> To: Cottrell, Les; Yang, Wei; atlas-sccs-planning-l
> Subject: RE: Tier 2 web page
>
> There was a pointer buried in my replies to Stephen's Aug/9
> meeting minutes which may be useful for locating the US Tier-2 sites:
> http://www.usatlas.bnl.gov/twiki/bin/view/Admins/WebHome#Tier2
> _Site_Web_Pages
> There is a separate page for BNL Tier-1
> http://www.acf.bnl.gov/
> but I am not sure either are really up to date.
> Su Dong
>
>
> > -----Original Message-----
> > From: [log in to unmask]
> > [mailto:[log in to unmask]] On Behalf Of
> > Cottrell, Les
> > Sent: Wednesday, August 23, 2006 9:58 AM
> > To: Yang, Wei; atlas-sccs-planning-l
> > Subject: RE: Tier 2 web page
> >
> > Is there a list of ATLAS Tier 1 and 2 sites such that we
> could set up
> > a web page showing connectivity, round-trip-time, loss, jitter to
> > those sites from SLAC, CERN & BNL?
> >
> > -----Original Message-----
> > From: [log in to unmask]
> > [mailto:[log in to unmask]] On Behalf Of
> > Yang, Wei
> > Sent: Tuesday, August 22, 2006 9:16 PM
> > To: atlas-sccs-planning-l
> > Subject: Tier 2 web page
> >
> > I discussed with Len about the Tier 2 web page. The issue can be
> > divided into two areas: content management tools and Tier
> > 2 content. Here is a summary. any comment?
> >
> > Content management tools:
> >
> > A static page is good at the beginning. In the near future,
> we might
> > want to look at the possibility of using Plone, which is a
> Wiki-like
> > tool but provides more features.
> >
> > Tier 2 content:
> >
> > The discussion focused on the needs of 'local users'. But
> now I am not
> > so sure if this is correct. I will add what I think about
> the needs of
> > grid users at the end.
> >
> > --------------------------------------------------------------
> > ---------
> > Notification
> > *) Outage, major changes
> > *) Events
> >
> > How to obtain computer accounts for SLAC Tier 2
> > *) Unix account + e-mail account, prefer to send e-mail to
> users' home
> > institutes.
> > *) Full SLAC accounts (unix, e-mail, Windows/exchange, link to
> > existing
> > page)
> > *) Procedures to obtain accounts (discussion: PI -> Charlie ->
> > HelpDesk ?)
> >
> > SLAC Tier 2 Facilities
> > *) SLAC computing environment, short text and a link to
> existing one.
> > *) Security page, a link to existing page.
> > *) Public machines
> > *) Setup Atlas environment, links to Stephen's page and
> Atlas workbook
> > *) Disk space
> > in general
> > AFS related issues
> > Atlas space areas
> > *) Batch
> > LSF documents
> > Commands to submit Atlas jobs to SLAC LSF farm
> > LSF resources available to Atlas local users
> >
> > Data Availability
> > *) DQ2 browser and space (Panda monitoring page)
> > *) How to bring in and transfer out datasets (discussion:
> do we allow
> > a
> > local user to do this?)
> >
> > Helps
> > *) HyperNews at CERN
> > *) [log in to unmask]
> > *) Other contact info
> >
> > Userful Links
> > ...
> > --------------------------------------------------------------
> > -----------
> > Grid users should not need much info about us. I am
> thinking to start
> > with the following:
> >
> > *) Outage, major change, events.
> > *) How to obtain a certificate/account for grid jobs to SLAC
> > including limitations of SLAC grid accounts.
> > *) Data availability (see above for local users)
> > *) Submit jobs via Panda, a link to BNL
> > *) HyperNews at CERN for discussion
> > *) BNL RT (for Western T2) for Tier 2 related help
> > *) Panda page/DQ2 page for various statistics.
> > *) Ganglia monitoring in the future?
> >
> > --
> > Wei Yang | [log in to unmask] | 650-926-3338(O)
> >
> >
> >
> >
>
>
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