1. GridPP storage status update Joint GridPP Board Deployment User Experiment Update Support Team, Imperial 12 July 2007, j.jensen@rl.ac.uk

2. Status Everybody running DPM or dCache –In some cases, and Roughly 2/3 running DPM, 1/3 dCache Unless not: –3-4 CASTOR, 1 StoRM

3. Support Community with about 50 members Includes members from Ireland, Germany, Canada, Poland, Italy, CERN Weekly VRVS meetings, mailing list, wiki, blogs Good relations to developers

4. Issues Overview (randomly) Migration Proactive support Stability Monitoring Accounting Other SRMs Usable storage CPU to storage ratios Security Upgrades Filesystems

5. Issues Details Migration  GLUE 1.3  SRM 2.2  …GLUE 2.0 Interoperability, testing “Proactive” support Short 1+ staff Help sites getting stuck (not naming names) Sites going AWOL (no stick)

6. Issues Details Stability Keep SE running & happy Software – robust vs feature Monitoring & Acct. Shared available space Account by VO subsets

7. Issues Details Other SRMs Bristol on StoRM CASTOR, CASTOR, CASTOR, and CASTOR CPU/Storage ratios Most Atlas and CMS sites short Does anyone care? If yes, what do we do…?

8. Issues Details Security SSC (Alessandra) Recent DPM vuln. Upgrades Regular, ongoing Trivial to non-trivial E.g. db schemas Manual vs YAIM

9. Issues Details Filesystems Optimised –Investigations Distributed –Not supported –But required? Usable Storage Performance WN-to-SE LAN Metrics Stability Experiment experts

10. Loose ends Contributions to Grid storage m’ware –Information systems (GIP), accounting –Upstream: Documentation, testing –Dissemination, publications, demos NGS Engineering Task Force (Jens) –Evaluated DPM (also for Solaris) –Distributed filesystems (AFS eval., GPFS?)

11. Other Contributions LCG –SRM testing community, WLCG GSSD –CASTOR International standards –GSM-WG, GLUE-WG

12. Conclusions Lots of DPM expertise (Graeme, Greig), dCache expertise (Derek, Greig) Plus SRM, GLUE, filesystems expertise Publications & disseminations Regular significant support issues (no asymptotic smoothness)