Speaker
Stefano Bagnasco
(Universita e INFN (IT))
Description
In a typical scientific computing centre, diverse applications coexist and
share a single physical infrastructure. An underlying Private Cloud
infrastructure eases the management and maintenance of such heterogeneous
applications (such as multipurpose or application-specific batch farms,
Grid sites catering to different communities, parallel interactive data
analysis facilities and others), allowing to dynamically and efficiently
allocate resources to any application, precisely tailoring the virtual
machines according to the applications' requirements. Furthermore, the
maintenance of large deployments of complex and rapidly evolving middleware
and application software is eased by the use of virtual images and
contextualization techniques; for example, rolling updates can be performed
easily and minimizing the downtime. In this contribution we describe the
Private Cloud infrastructure at the INFN-Torino Computer Centre, that hosts
a full-fledged WLCG Tier-2 centre, a dynamically expandable PROOF-based
Interactive Analysis Facility for the ALICE experiment at the CERN LHC and
several smaller scientific computing applications. The private cloud
building blocks include the OpenNebula software stack, the GlusterFS
filesystem (used in two different configurations for worker- and
service-class hypervisors) and the OpenWRT Linux distribution (used for
network virtualization); a future integration into a federated higher-level
infrastructure is made possible by exposing commonly used APIs like EC2 and
OCCI. In this talk we describe the operational experience and the latest
developments in the integration with evolving experiment Computing Models.
Primary authors
Dario Berzano
(CERN)
Riccardo Brunetti
(Unknown)
Sara Vallero
(Universita e INFN (IT))
Stefano Bagnasco
(Universita e INFN (IT))
Stefano Lusso
(INFN-TO)
