不爲也 比不能也

Lucene 6.0 introduced new exciting feature called multi-dimensional points. While the name of the feature puts a lot of emphasis on the fact that it supports multiple dimensions, this feature behaves more than decently in the case of a single dimension and actually better than the trie encoding that was used in previous versions of Lucene. This caused us to refactor number-based fields (byte, sh..

Disable the features you do not need By default Elasticsearch indexes and adds doc values to most fields so that they can be searched and aggregated out of the box. For instance if you have a numeric field called foo that you need to run histograms on but that you never need to filter on, you can safely disable indexing on this field in your mappings:기본적으로, Elasticsearch는 대부분의 field가 검색되고 aggreg..