Speaker
Dr
Simone Pagan Griso
(University and INFN Padova)
Description
Large international collaborations that use de-centralized computing
models are becoming a custom rather than an exception in High Energy Physics.
A good computing model for such big and spread collaborations has to
deal with the distribution of the experiment-specific software around the world.
When the CDF experiment developed its software infrastructure,
most computing was done on dedicated clusters. As a result,libraries,
configuration files, and large executable were deployed over a shared file system.
In order to adapt its computing model with the Grid CDF decided to distribute its software to all the European Grid sites using Parrot, a user-level application able to attach existing
programs to remote I/O systems through the filesystem interface.
This choice allows CDF to use just one centralized source of code and a
scalable set of caches all around Europe to efficiently distribute its code
and requires almost no interaction with the existing Grid middle-ware or
with local system administrators.
This system is in production at CDF in Europe since more than 1 year. Here,
we present the CDF implementation of Parrot and the performances. We will
discuss in detail scalability issues and the improved performances with the
usage of cache-coherence which has been developed inside CDF and integrated in the Parrot release.
| Presentation type (oral | poster) | oral |
|---|
Primary authors
Dr
Donatella Lucchesi
(University and INFN Padova)
Dr
Gabriele Compostella
(CNAF INFN)
Dr
Simone Pagan Griso
(University and INFN Padova)
Co-authors
Dr
Douglas Thain
(Notre Dame University)
Dr
Igor Sfiligoi
(Fermilab)
