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

Scalable Global Grid catalogue for LHC Run3 and beyond

Oct 13, 2016, 3:30 PM
1h 15m
San Francisco Marriott Marquis

San Francisco Marriott Marquis

Poster Track 7: Middleware, Monitoring and Accounting Posters B / Break


Miguel Martinez Pedreira (CERN)


The AliEn file catalogue is a global unique namespace providing mapping between a UNIX-like logical name structure and the corresponding physical files distributed over 80 storage elements worldwide. Powerful search tools and hierarchical metadata information are integral part of the system and are used by the Grid jobs as well as local users to store and access all files on the Grid storage elements.

The catalogue is in production since 2005 and over the past 11 years has grown to more than 2 billion logical file names. The back-end is a set of distributed relational databases, ensuring smooth growth and fast access. Due to the anticipated fast future growth, we are looking for ways to enhance the performance and scalability by simplifying the catalogue schema while keeping the functionality intact. We investigated different back-end solutions, such as distributed key value stores, as replacement for the relational database. This contribution covers the architectural changes in the system, together with the technology evaluation, benchmark results and conclusions.

Primary Keyword (Mandatory) Computing middleware
Secondary Keyword (Optional) Distributed data handling

Primary author


Presentation materials