perfSONAR User Q&A and Other Discussion

[Andrew Lake <>]

> 
> 
> I just double checked, our pSB should register with this LS:
> 
> http://ndb1.internet2.edu:9995/perfSONAR_PS/services/hLS
> 
> Someone from ESnet can probably reply with information on theirs.

Ours can be found in http://ps2.es.net:8095/perfSONAR_PS/services/hLS or 
http://ps5.es.net:8095/perfSONAR_PS/services/hLS. They should be registered 
both places.

Thanks,
Andy


> 
> Thanks;
> 
> -jason
> 
>> Thanks
>> Madhav
>> 
>> 
>> Hi Madhav;
>> 
>> As Victor noted in his response, you may have more luck finding BWCTL and
>> OWAMP daemons instead of MPs. The service author can correct me if I am
>> misrepresenting the service - but I do not believe that the BWCTL MPs 
>> register
>> into the Information Services infrastructure.
>> 
>> Some more comments inline:
>> 
>> On 9/29/10 4:47 PM,
>> 
>> wrote:
>> Hi All,
>> 
>> I am a graduate student at Georgia Tech and as part of my research work I 
>> have
>> been exploring perfsonar deployment and looking to establish the set of
>> services I can use.
>> 
>> I am currently interested in performing some on-demand OWAMP measurement
>> between a set of nodes in a mesh manner.
>> 
>> I attempted to retrieve the list of access points for OWAMP MP's using the
>> following Xquery directed at Home look up services.
>> 
>> my $hLSXquery = "declare namespace
>> nmwg=\"http://ggf.org/ns/nmwg/base/2.0/\";\n";;;
>> $hLSXquery .= "declare namespace
>> perfsonar=\"http://ggf.org/ns/nmwg/tools/org/perfsonar/1.0/\";\n";;;
>> $hLSXquery .= "declare namespace
>> psservice=\"http://ggf.org/ns/nmwg/tools/org/perfsonar/service/1.0/\";\n";;;
>> $hLSXquery .= "declare namespace
>> nmtb=\"http://ogf.org/schema/network/base/20070828/\";\n";;;
>> $hLSXquery .= "for \$metadata in
>> /nmwg: "LSStore\"]/nmwg:metadata\n";
>> $hLSXquery .= " let \$metadata_id :=
>> \$metadata/
>> \n";
>> $hLSXquery .= " let \$data :=
>> /nmwg: "LSStore\"]/nmwg: ";
>> $hLSXquery .= " let \$eventType := \$data/nmwg:metadata/nmwg:eventType";
>> $hLSXquery .= " where
>> \$metadata/perfsonar:subject/psservice:service/psservice:serviceType=\"MP\"
>> and
>> \$eventType=\"http://ggf.org/ns/nmwg/tools/owamp/2.0\"";;;
>> $hLSXquery .= " return
>> \$metadata/perfsonar:subject/psservice:service/psservice:accessPoint";
>> 
>> I queried all the home look up services(i retrieved information about HLS 
>> from
>> the GLS) one by one using the above query.
>> 
>> Through this script I was able to retrieve all the MA's(changed 
>> serviceType to
>> MA) that support OWAMP data but when I change the serviceType to MP it
>> returned no OWAMP MP's. Same was the case when I queried for BWCTL MP's
>> 
>> I looked at the on-demand support in the document
>> www.geant2.net/.../PB_perfSONAR_MDM_3.0_20080125103826.pdf and it only
>> mentions about on-demand tests being supported for BWCTL (I was however not
>> able to retrieve any data on BWCTL MP's as well)
>> 
>> Has anyone been able to retrieve the list of OWAMP and BWCTL MP's ? I am 
>> able
>> to retrieve the list of
>> pinger MP's via the same script. Would I be correct in inferring that OWAMP
>> and BWCTL MP's have not seen much deployment?
>> 
>> 
>> The pS Performance Toolkit accounts for many of the OWAMP and BWCTL daemons
>> you will find in the wild. The Toolkit does not have an MP interface for 
>> these
>> services though. perfSONAR-BUOY is an MA type service that will expose
>> measurements on the Toolkit that are being collected regularly and would be
>> your best way to find measurements between arbitrary endpoints.
>> 
>> 
>> I basically want to be able to monitor the rtt and loss between the set of
>> nodes. Is there some other service in perfsonar besides OWAMP which I can 
>> use
>> to get the same data, considering the lack of OWAMP MP deployment.
>> 
>> If you guys can provide me pointers on how I can accomplish what I am 
>> looking
>> to do I would be great-full
>> 
>> 
>> 
>> I think you can try to get what you are looking for in one of two ways:
>> 
>> 1) use perfSONAR-BUOY to set up your own tests from a central point 
>> (perhaps
>> at Georgia Tech) to the daemons that you find via the information services.
>> This would not be a full mesh, but would be a start.
>> 
>> 2) Rely on perfSONAR-BUOY instances that may have the measurements 
>> available
>> that you are looking for. For example Internet2 and ESnet perform regular 
>> mesh
>> testing between points on the backbone networks. If you can find the MAs 
>> for
>> each deployment (e.g. Internet2's =
>> http://ndb1.net.internet2.edu:8085/perfSONAR_PS/services/pSB, ESnet's has
>> several, and they can be found in the Information services) you will be 
>> able
>> to get data for different paths.
>> 
>> Hope this helps;
>> 
>> -jason
>> 
>> 
>> Thanks!
>> Madhav
> 
> 
> -- 
> 
> Jason Zurawski, Network Software Engineer III & Research Liaison
> Internet2
> 
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