不爲也 比不能也

The first challenge that had to be solved was how to make text searchable. Traditional databases store a single value per field, but this is insufficient for full-text search. Every word in a text field needs to be searchable, which means that the database needs to be able to index multiple values—words, in this case—in a single field.해결해야 할 첫 번째 과제는, 텍스트를 검색 가능하도록 만드는 방법이다. 전통적인 데이터베이스는 field당 ..

The next problem that needed to be solved was how to make an inverted index updatable without losing the benefits of immutability? The answer turned out to be: use more than one index.해결해야 할 다음 문제는, 불변성의 장점을 잃지 않고, inverted index를 업데이트 가능하도록 만드는 방법이다. 답은 하나 이상의 index를 사용하는 것이다.Instead of rewriting the whole inverted index, add new supplementary indices to reflect more-recent changes. Each invert..