1. Mirroring an OAI archive with an I2-DSI channel Ryan Richardson Edward A. Fox Digital Library Research Laboratory Virginia Tech May 7 th, 2002

2. OAI and I2-DSI OAI – metadata harvesting – OAI-PMH – Data providers/Service providers I2-DSI – mirroring and replication Can we put them together to get benefits of both? Is this the first of many higher level mirroring schemes for Internet2, that provide independence from lower level representation issues?

3. Architectural Diagram Mirror User Internet OAI Server Distributed Director

4. Technical Issues Resumption tokens – Mirrors are stateless, so any mirror can answer (any part of) a request Every client request to the mirror is logged, to enable log comparison among the mirror archives Mirroring time is dependent on # of records sent in each chunk

5. The interface

6. Additional Partners UT-Knoxville developed the I2-DSI tools software Hussein Suleman at VT developed the Repository Explorer for OAI Mirrors are planned across the US and in Mexico and Germany NSF grant IIS-0080748 provided funding