1. SCAPE Andy Jackson The British Library SCAPEdev1 AIT, Vienna - 6 th – 7 th June 2011 Welcome First SCAPE Developers’ Workshop

2. SCAPE SCAPEdev1 – The Goals Get to know each other. Get familiar with the major platforms. Outline and discuss the initial Preservation Component (a.k.a. tool) integration plan. 2

3. SCAPE Getting to know me Andrew Jackson, at the British Library Technical Coordinator for SCAPE, which means… Someone to go to when you get stuck Someone who will look for cross-work-package confusion or integration problems Someone who will propose solutions if necessary Chair of the Technical Coordination Committee Raising and resolving technical integration issues, etc. Open – let me know if you want to sit in or raise an issue Will meet via Skype monthly 3

4. SCAPE Getting to know each other Round-the-room Let’s get it out of the way… And… Talk together Debug together Eat together And finally, put your picture on the SCAPE wiki and/or Sharepoint… …if you don’t mind. 4

5. SCAPE Where are Preservation Components used? SCAPE Testbeds (TB) Taverna designs workflows that run the tools. SCAPE Platform (PT) Executing tools and workflows at scale. Preservation Planning & Watch (PW) PLATO uses tools on sample files during planning. And beyond… Integration into tools, repositories, institutions, command- line interfaces (CLI) & scripting, etc… 5

6. SCAPE Testbeds & Taverna SCAPE Testbeds are generating scenarios and preservation workflows that explore them Uses Taverna to build workflows that invoke our tools WSDL/SOAP calls mature RESTful style maturing rapidly Core integration of CLI plugin as of 2.3 We’ll play with it this morning 6

7. SCAPE The SCAPE Platform Initially, vanilla Hadoop, HDFS and HBase Pure Java preferred Local CLI okay too Later on, running Taverna workflows Pure Java, local CLI Or locally deployed web services if necessary Later on, may invoke services from inside VMs e.g. when tools need a particular OS Web services would make integration easier 7

8. SCAPE Why HBase? Hadoop+HDFS provides massive fault-tolerant file system and processing But HDFS does not cope well with lots of 'small' files See here for information:http://www.cloudera.com/blog/2009/02/the- small-files-problemhttp://www.cloudera.com/blog/2009/02/the- small-files-problem HBase architecture is a good fit for our use cases HBase is used in many places… Including web archiving at SCAPE partners We’ll play with Hadoop and HBase this afternoon 8

9. SCAPE PLATO & Wider Integration PLATO Planning Tool (PW) CC, PA and QA during planning process Stable API web services required (WSDL or REST) Repository Integration Local CLI for some (e.g. ePrints PLATO integration [*]) RESTful for others Web Integration RESTful style preferred 9

10. SCAPE The Challenges Reproducible tool invocation across all contexts: CLI, Java, SOAP / REST But ease of development and deployment is critical Interoperable data formats and consistent semantics across contexts where required So clients can understand tool outputs correctly Tomorrow we’ll explore the proposed integration plan 10

11. SCAPE Questions? 11

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