About

A log server is an application that is aimed to:

• receive log via a collector
• analyse them
• report on them
• and send alert if needed

They are mostly search engine where:

• the words are stored in a inverted index
• there is an index created for each key pair value

List

• Elastic Search (lucene based)
• New Relic (lucene based)
• Loki (Graphana)
• DataDog
• LogDna
• Loggly

A log server may also be part of a monitoring platform.