Elasticsearch

Quick Tips

tf-idf scores with Terms filtering (available upon 2.x)

POST http://$host:9200/$Index/$Type/_termvectors

{
  "doc": {
    "goods_name": "幫寶適 Pampers 超薄乾爽嬰兒紙尿褲 S (74片x4包)"
  },
  "term_statistics": true,
  "field_statistics": true,
  "positions": false,
  "offsets": false,
  "filter": {}
}

Troubleshooting

ERROR: bootstrap checks failed (v5.x)

• As soon you provide a custom setting for network.host, Elasticsearch assumes that you are moving from development mode to production mode, and upgrades a number of system startup checks from warnings to exceptions.
• check ERROR message and check Bootstrap Checks sections.

Reference

• Elasticsearch – timing out queries

• Managing Elasticsearch time-based indices efficiently

• Elasticsearch from the Bottom Up, Part 1, Video

• Visualizing Lucene's segment merges

• Using Word2Vec in Fusion for Better Search Results

• 30x Faster Elasticsearch Queries