Elastic search and OCR

Understanding integrated search

The integrated fulltext serach using Elatic search is a internal/active approach to indexing the content. Content will be added to a indexing queue every time it is updated - ensuring allways updated content, but consuming CPU ressources on the indexing server.

Beacuase file indexing is very CPU intensive, the file indexing functionality i seperated into a service that can run on a server seperated from te main application server. Anyway the fileindexer will run from a database queue.

The basic search service requires

• TS file indeing service (queue handler)
• Elastic search server (search engine)

If PDF OCR functionality is needed the following components needs installation too

• Ghostscript (PDF to TIFF conversion)
• Tesseract (OCR library)

The above components for OCR must be installed on the file indexing server.