Monthly Archives: December 2014

Samsung 840 EVO degradation

Rumour has it that our 25 lovely 1TB Samsung 840 EVO drives in our Net Archive search machine does not perform well, when data are left untouched for months. Rumour in this case being solid confirmation with a firmware fix … Continue reading

Posted in eskildsen, Low-level, Performance | 1 Comment

Changing field type in Lucene/Solr

The problem We have 25 shards of 900GB / 250M documents. It took us 25 * 8 days = half a year to build them. Three fields did not have DocValues enabled when we build the shards: crawl_date (TrieDateField): Unknown … Continue reading

Posted in eskildsen, Hacking, Low-level, Lucene, Solr | Leave a comment