1. SAN DIEGO SUPERCOMPUTER CENTER Replication Policies for Federated Digital Repositories Robert H. McDonald Chronopolis Project Manager mcdonald@sdsc.edu Christopher Jordan Data Reliability Manager ctjordan@sdsc.edu Prepared for Science Archives in the 21 st Century Workshop – April 2007, University of Maryland.

2. SAN DIEGO SUPERCOMPUTER CENTER Federated Data Replication Replication using Storage Resource Broker (SRB) Federation NCAR MSS SDSC HPSS 2006-2010 50 TB – 300 TB HPSS Mass Store

3. SAN DIEGO SUPERCOMPUTER CENTER Summary Storage Swap between SDSC and NCAR 100 TB 2006 – 300 TB 2010 Offsite Geographically Distributed Replication via TeraGrid Network HPSS Growth 14 PB 2010 Automated Replication Policies Automated Reporting and Verification mechanisms for collections Demonstration for Chronopolis Preservation Environment SDSC – NCAR – Univ. of Maryland UMIACS