21-27 March 2009
Prague
Europe/Prague timezone

Dealing with orphans: catalogue synchronisation with SynCat

26 Mar 2009, 08:00
1h
Prague

Prague

Prague Congress Centre 5. května 65, 140 00 Prague 4, Czech Republic
Board: Thursday 020
poster Grid Middleware and Networking Technologies Poster session

Speaker

Dr Paul Millar (DESY)

Description

In the gLite grid model a site will typically have a Storage Element (SE) that has no direct mechanism for updating any central or experiment-specific catalogues. This loose coupling was a deliberate decision that simplifies SE design; however, a consequence of this is that the catalogues may provide an incorrect view of what is stored on a SE. In this paper, we present work to allow catalogue re-synchronisation. This shows how catalogues can be more certain that the files are stored on the SE and how more transitory metadata may be propagated with low latency; for example, whether a file stored on tape is currently available on disk.

Primary author

Dr Paul Millar (DESY)

Co-author

Presentation Materials