不爲也 比不能也

Documents are indexed—stored and made searchable—by using the index API. But first, we need to decide where the document lives. As we just discussed, a document’s _index, _type, and _iduniquely identify the document. We can either provide our own _id value or let the index API generate one for us.document는 index API에 의해 색인된 (저장되고 검색 가능하도록 만들어진)다. 그러나 먼저, document를 어디에 저장할지를 결정해야 한다. 방금 이야기했듯이, d..

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 ..

The syntax for deleting a document follows the same pattern that we have seen already, but uses the DELETE method :document를 삭제하는 문법은 우리가 이미 보았던 것과 동일한 형태를 가진다. 하지만, DELETE method를 사용한다.DELETE /website/blog/123COPY AS CURLVIEW IN SENSE If the document is found, Elasticsearch will return an HTTP response code of 200 OK and a response body like the following. Note that the _version number has been..

Elasticsearch is distributed. When documents are created, updated, or deleted, the new version of the document has to be replicated to other nodes in the cluster. Elasticsearch is also asynchronous and concurrent, meaning that these replication requests are sent in parallel, and may arrive at their destination out of sequence. Elasticsearch needs a way of ensuring that an older version of a docu..

You should always run the most recent version of the Java Virtual Machine (JVM), unless otherwise stated on the Elasticsearch website. Elasticsearch, and in particular Lucene, is a demanding piece of software. The unit and integration tests from Lucene often expose bugs in the JVM itself. These bugs range from mild annoyances to serious segfaults, so it is best to use the latest version of the J..