Migration off DSpace 1.8.2
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A presentation by Max and I for Aotearoa Instiutional Repositories Community Day (AKA NZIRC) 30 September 2021. Discusses challenges of moving off a very old version of DSpace to a mixed-model with a modern DSpace and figshare. The focus is on DSpace and metadata
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Sukanta Saha is a data warehousing and investment banking professional with over 3 years of experience implementing projects using Informatica Power Center. He has expertise in ETL processes, data modeling, working with databases like Oracle, SQL Server, and Teradata. Currently working as an Informatica developer at Tata Consultancy Services in Pune, his past projects include data migration for Barclays Bank and developing mappings for loading data into a Teradata data warehouse. He has certifications in Oracle Database SQL and skills in technologies like Unix, SQL, and data warehousing concepts.
Resume_sukanta_updated
Sukanta Saha is a data warehousing and investment banking professional with over 3 years of experience implementing projects using Informatica Power Center. He has expertise in ETL processes, data modeling, working with databases like Oracle, SQL Server, and Teradata. Currently working as an Informatica developer at Tata Consultancy Services in Pune, his past projects include data migration for Barclays Bank and developing mappings for loading data into a data warehouse serving the banking and financial services domain. He has certifications in Oracle Database SQL and skills in technologies like Unix, SQL, and data warehousing concepts.
Resume_APRIL_updated
Sukanta Saha is a data warehousing and investment banking professional with over 3 years of experience implementing projects using Informatica Power Center. He has expertise in ETL processes, data modeling, working with databases like Oracle, SQL Server, and Teradata. Currently working as an Informatica developer at Tata Consultancy Services in Pune, his past projects include data migration for Barclays Bank and developing mappings for loading data into a data warehouse serving the banking and financial services domain. He has certifications in Oracle Database SQL and seeks to further contribute his skills in data integration.
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- 1. Migration off DSpace 1.8.2 Max Sullivan Digital Research Services Coordinator max.sullivan@vuw.ac.nz Stuart Yeates Library Infrastructure Engineer stuart.yeates@vuw.ac.nz
- 2. Overview • Four instances of DSpace 1.8.2 • Both OS and application software out of support • All content exported as packages containing mets.xml and files. • Import to DSpace 6 via METS package and app using SWORD.
- 3. Issue 1 – SWORD Metadata – Stuart • SWORD transfers METS packages • SWORD originated in EPrints • → SWORD METS metadata defaults to EPDCX – "EPrints Dublin Core X" – Weird encoding of basic DC • METS supports every metadata schema • Determining which is used is hard • →We stripped 95% of it out for debugging
- 4. Issue 2 – Excel Identifiers – Stuart • Exporting from one DSpace into another overwrites identifiers by default • Identifiers needed to build httpd redirects • Used DSpace CSV metadata export and Excel 'match - lookup' to reconstruct the identifiers from other metadata. • There are good tutorials on the web
- 5. Issue 2 – Excel Identifiers – Stuart 1. Load CSVs into separate sheets in Excel 2. Bring first identifier into blank third sheet 3. Build a compound key from other columns 4. Use compound key to find row in other sheet 5. Bring second identifier to third sheet 6. Use two identifiers to build redirects 7. Cut-n-paste redirects to httpd config files
- 6. Issue 3 – File Ownership Conflicts – Max • Migrated 10,000 items via command line import script as the wrong Linux user. • This caused intermittent errors when attaching files to deposits. chown –R tomcat:tomcat /path/to/assetstore
- 7. Issue 4 – Permissions – Max • Double access policies. – Default policy from collection – Policy set in mets.xml • Any ideas on how to avoid this?
- 8. Wrap up and questions • Setting up redirects for public thesis handle URLs • Upgrade DSpace in the future, we hope ?