不爲也 比不能也

As the project manager of stagemonitor, an open source performance monitoring tool, I've recently been looking for a database to replace the cool-but-aging Graphite Time Series DataBase (TSDB) as the backend. TSDBs are specialised packages for storing (performance) metric data, like the response time of your app or the CPU utilisation of a server. Ultimately, we were looking for a datastore that..

Running Elasticsearch 2.0? Check out this updated post about performance considerations for Elasticsearch 2.0 indexing. Elasticsearch 2.0을 운영 중이라면? Elasticsearch 2.0 indexing에 대한 성능 고려 사항에서 update된 post를 확인해 보자. Elasticsearch users have delightfully diverse use cases, ranging from appending tiny log-line documents to indexing Web-scale collections of large documents, and maximizing indexing thro..

UPDATE: This article refers to our hosted Elasticsearch offering by an older name, Found. Please note that Found is now known as Elastic Cloud.이 게시물은 기존에 Found라는 이름으로 제공된 Elasticsearch 서비스에 관한 것이다. Found은 이제 Elasticsearch Cloud로 알려져 있다.Simple Suggestions for Speedier SearchesElasticsearch can query, filter and aggregate in many ways. Often there are several ways to solve the same problem – and p..

UPDATE: This article refers to our hosted Elasticsearch offering by an older name, Found. Please note that Found is now known as Elastic Cloud.이 게시물은 기존에 Found라는 이름으로 제공된 Elasticsearch 서비스에 관한 것이다. Found은 이제 Elasticsearch Cloud로 알려져 있다.In this article series, we look at Elasticsearch from a new perspective. We'll start at the "bottom" (or close enough!) of the many abstraction levels, and gradua..

Strict REST query string parameter parsingeditPrevious versions of Elasticsearch ignored unrecognized URL query string parameters. This means that extraneous parameters or parameters containing typographical errors would be silently accepted by Elasticsearch. This is dangerous from an end-user perspective because it means a submitted request will silently execute not as intended. This leniency h..

Optimize APIeditThe Optimize API has been deprecated, all new optimize actions should use the new Force Merge API.optimize API는 deprecate되었다. 모든 최적화 작업은 새로운 Force Merge API를 사용해야 한다.Queue size statseditThe value for the queue_size in nodes info/stats was sometimes shown as "1k" instead of 1000. These values are always shown as an integer now.node info/stats에서 queue_size 에 대한 값은 가끔씩 1000 이 아닌 "1k..

In Life Inside a Cluster, we introduced the shard, and described it as a low-level worker unit. But what exactly is a shard and how does it work? In this chapter, we answer these questions:Life Inside a Cluster에서, low-level worker unit 이라 묘사된, shard를 소개했었다. 이 장에서는 shard가 정확이 무엇이고, shard가 동작하는 방법에 대한 설명을 하도록 하겠다.Why is search near real-time?왜 검색은 실시간에 가까운가?Why are document CRUD (create-read-updat..

With the automatic refresh process creating a new segment every second, it doesn’t take long for the number of segments to explode. Having too many segments is a problem. Each segment consumes file handles, memory, and CPU cycles. More important, every search request has to check every segment in turn; the more segments there are, the slower the search will be.매초마다 자동 refresh 프로세스가 새로운 segment를 ..

As time-based data ages, it becomes less relevant. It’s possible that we will want to see what happened last week, last month, or even last year, but for the most part, we’re interested in only the here and now.시간 기반의 데이터는 오래 될수록, 관련성이 적어진다. 지난 주, 지난 달, 심지어 지난해에 무슨 일이 있었는지 알고 싶을 수도 있지만, 대부분의 경우, 지금, 여기에만 관심이 있다.The nice thing about an index per time frame is that it enables us to easily delete o..