Speaker
Lana Abadie
(CERN)
Description
The DPM (Disk Pool Manager) provides a lightweight and scalable
managed disk storage system. In this paper, we describe the new
features of the DPM.
It is integrated in the grid middleware and is compatible with
both VOMS and grid proxies. Besides the primary/secondary groups
(or roles), the DPM supports ACLs adding more flexibility in
setting file permissions.
Tools to interact with the DPM at different levels have been
extended so that site managers can more dynamically configure and
manage their DPM in a consistent way. In addition to rfio and
gsiftp, users can now use the xrootd and https protocols to
access the DPM.
A new version of Storage Resource Manager (SRM) interface, v2.2
has been implemented. One of the novelties is the reserve space
concept, useful to guarantee space for a specific user or a group
during a given period of time.
DPM has been deployed in roughly 80 Tier-2 sites and in several
medical institutes. Unlike physics data, medical data is very
sensitive. The DPM will offer the possibility to encrypt data
throughout the process in a very secure way by implementing a
key-distributed system.
Performance has been improved by the use of bulk queries.
Stressing tests have shown a good robustness of the DPM against
concurrent accesses.
Primary authors
Akos Frohner
(CERN)
Jean-Philippe Baud
(CERN)
Krzysztof Nienartowicz
(CERN)
Lana Abadie
(CERN)
Remi Mollon
(CERN)
Smith David
(CERN)
Sophie Lemaitre
(CERN)
