不爲也 比不能也

Mapping types are going away. Elasticsearch 6.0 supports a single mapping type per index only, and it represents the first step on the way to removing types altogether.mapping type이 없어진다. Elasticsearch 6.0은 index 당 하나의 mapping type만 지원하며, 그것은 type을 완전히 제거하는 것의 첫 번째 단계이다.This blog post explains what types are, why we are removing them, how you can migrate your indices to a single type world, and ..

_reindex and _update_by_query are coming to Elasticsearch 2.3.0 and 5.0.0-alpha1! Hurray!_reindex 와 _update_by_query 가 Elasticsearch 2.3.0 과 5.0.0 에 제공된다._reindex reads documents from one index and writes them to another index. It can be used to copy documents from one index to another, enrich documents with fields, or recreate the index to change settings that are locked when the index is creat..

Documents in Elasticsearch are immutable; we cannot change them. Instead, if we need to update an existing document, we reindex or replace it, which we can do using the same index API that we have already discussed in Indexing a Document.Elasticsearch에서 document는 불변 이다. document를 변경할 수 없다. 대신, 기존의 document를 업데이트하려면, reindex 또는 replace해야 한다. Indexing a Document에서 이미 이야기했던 것과 동일한 index API를 사용할 수 ..

When updating a document with the index API, we read the original document, make our changes, and then reindex the whole document in one go. The most recent indexing request wins: whichever document was indexed last is the one stored in Elasticsearch. If somebody else had changed the document in the meantime, their changes would be lost.index API를 사용하여 document를 업데이트하는 경우, 원래의 document를 읽고, 변경을 ..

Although you can add new types to an index, or add new fields to a type, you can’t add new analyzers or make changes to existing fields. If you were to do so, the data that had already been indexed would be incorrect and your searches would no longer work as expected.index에 새로운 type을 추가하거나 type에 새로운 field를 추가할 있지만, 새로운 analyzer를 추가하거나 기존 field를 변경할 수 없다. 그렇게 하면, 기존의 색인 데이터는 올바르지 않게 되고, 검색은 더 이상 ..

The problem with the reindexing process described previously is that you need to update your application to use the new index name. Index aliases to the rescue!위에서 언급한 reindex 프로세스의 문제점은, 새로운 index 이름을 사용하기 위해, 응용프로그램을 업데이트해야 한다는 점이다. index alias가 해결책이다.An index alias is like a shortcut or symbolic link, which can point to one or more indices, and can be used in any API that expects an index nam..

The removal of stopwords is handled by the stop token filter which can be used when creating a custom analyzer (see Using the stop Token Filter). However, some out-of-the-box analyzers come with the stop filter pre-integrated:불용어의 제거는, 사용자 정의(custom) analyzer(Using the stop Token Filter 참조)를 생성하는 경우 사용될 수 있는, stop token filter에 의해 처리된다. 그러나, 몇몇 내장된 analyzer는 stop filter가 이미 통합되어 들어 있다.Language a..