操作文档 ——读写文档

1、Introduction

https://www.elastic.co/guide/en/elasticsearch/reference/8.8/docs-replication.html

Each index in Elasticsearch is divided into shards and each shard can have multiple copies. These copies are known as a replication group and must be kept in sync when documents are added or removed. If we fail to do so, reading from one copy will result in very different results than reading from another. The process of keeping the shard copies in sync and serving reads from them is what we call the data replication model.

在Elasticsearch，每个索引都被划分为多个分片，每个分片可以有多个副本。这些副本称为 replication group(复制组)。 在添加或删除文档时必须保持同步。如果我们不这样做，将导致从一个副本读取的数据与从另一个副本中读取的数据表现出截然不同的结果。保持主分片、副本间，两两副本间数据同步并提供读取数据的过程称为 data replication model(数据复制模型）。