Oct 10 – 14, 2016
San Francisco Marriott Marquis
America/Los_Angeles timezone

HTTP as a Data Access Protocol: Trials with XrootD in CMS' AAA Project

Oct 13, 2016, 11:30 AM
GG C3 (San Francisco Mariott Marquis)


San Francisco Mariott Marquis

Oral Track 4: Data Handling Track 4: Data Handling


Jean-Roch Vlimant (California Institute of Technology (US))


The main goal of the project to demonstrate the ability of using HTTP data
federations in a manner analogous to today.s AAA infrastructure used from
the CMS experiment. An initial testbed at Caltech has been built and
changes in the CMS software (CMSSW) are being implemented in order to
improve HTTP support. A set of machines is already set up at the Caltech
Tier2 in order to improve the support infrastructure for data federations
at CMS. As a first step, we are building systems that produce and ingest
network data transfers up to 80 Gbps. In collaboration with AAA, HTTP
support is enabled at the US redirector and the Caltech testbed. A plugin
for CMSSW is being developed for HTTP access based on the libdavix
software. It will replace the present fork/exec or curl for HTTP access.
In addition, extensions to the Xrootd HTTP implementation are being
developed to add functionality to it, such as client-based monitoring
identifiers. In the future, patches will be developed to better integrate
HTTP-over-Xrootd with the OSG distribution. First results of the transfer
tests using HTTP will be presented together with details about the setup.

Secondary Keyword (Optional) Network systems and solutions
Primary Keyword (Mandatory) Distributed data handling

Primary author

Justas Balcas (California Institute of Technology (US))


Brian Paul Bockelman (University of Nebraska (US)) Dorian Kcira (California Institute of Technology (US)) Harvey Newman (California Institute of Technology (US)) Jean-Roch Vlimant (California Institute of Technology (US)) Wayne Hendricks (California Institute of Technology (US))

Presentation materials