Overview of the Biodiversity Heritage Library: Recent Activities” (Powerpoint, June 2017). It opens with a general introduction to the service, and only becomes relevant to the “Recent Activities” bit of the title from slide 36 through 46.

Initial prototypes of both SOLR and ElasticSearch full-text search installations were created … about 8Tb disk space (1.6Tb on high-speed SSD) for the [ElasticSearch] Search Index and the OCR text.