不爲也 比不能也

If you are a frequent reader of this blog, you probably know that a lot of effort has already been put into making range queries faster. This time we are going to talk about recent improvements to the specific yet common case of range queries when they are used in conjunctions, ie. when they are ANDed with other queries.이 blog를 자주 접한 독자라면, 이미 range query를 더 빠르게 하기 위해 많은 노력을 했다는 것을 알 것이다. 이번에는 ra..

Like this post? Love numbers and Elasticsearch? I’ll be at Elastic{ON} to meet with attendees face to face and answer your questions. Consider attending the event. Hope to see you there.Imagine being able index your calendar to quickly find all events whose time range conflicts with a proposed event. Or creating a global television guide to find all shows, movies, sports, or broadcasts that are ..

Give memory to the filesystem cache Elasticsearch heavily relies on the filesystem cache in order to make search fast. In general, you should make sure that at least half the available memory goes to the filesystem cache so that Elasticsearch can keep hot regions of the index in physical memory.Elasticsearch는 search 속도를 빠르게 하기 위해, filesystem cache에 많이 의존한다. 일반적으로, Elasticsearch가 index 중 많이 사용하는 ..

While Elasticsearch comes with many queries, you will use just a few frequently. We discuss them in much greater detail in Search in Depth but next we give you a quick introduction to the most important queries.Elasticsearch에는 많은 query가 있지만, 자주 사용하는 것은 소수일 것이다. Search in Depth에서, 훨씬 더 자세히 이야기할 것이다. 아래에서 가장 중요한 query들에 대해 빠르게 소개하겠다.match_all QueryeditThe match_all query simply matches all documen..

Real world search requests are never simple; they search multiple fields with various input text, and filter based on an array of criteria. To build sophisticated search, you will need a way to combine multiple queries together into a single search request.현실에서 검색 request는 결코 간단하지 않다. 다양한 입력 문자열과 여러 조건의 배열을 기반으로 한 filter를 가지고 다수의 field를 검색한다. 정교한 검색을 위해, 하나의 검색 request에 다수의 query를 함께 조합해야 한다.To ..

When dealing with numbers in this chapter, we have so far searched for only exact numbers. In practice, filtering on ranges is often more useful. For example, you might want to find all products with a price greater than $20 and less than $40.이 장에서 number를 다룰 때, 지금까지는 정확한 수만을 검색했었다. 실제로는, 범위를 filtering하는 것이 때때로 더 유용하다. 예를 들어, 가격이 $20보다 크고 $40보다 작은 모든 상품을 찾아보자.In SQL terms, a range can be express..