我正在构建一个用于MongoDB的Java API。更具体地说,现在我正在尝试将连接到MongoDB并从该数据库中选择数据库和集合的过程封装到它自己的类中。import java.util.*; public DBCollection mongoEasy (String hostname, int port) {
Mongo m =
我正在考虑使用ElasticSearch作为大型对象的搜索引擎。在一台机器上大约有5亿个物体。对于执行高级查询,far is Elasticsearch是一个很好的解决方案。但有一个问题是,我确实找到了在文档字段上创建二级索引的技术。在elasticsearch中,是否有可能像在列上的MySQL中那样创建第二个indecies?或者,是否实现了其他技术来加速对字段值的搜索?我使用的是单个服务器环境,每个行/对象必须存储大约300个字段。目前,我的数据库中大约有5亿个对象。
- Required org.gradle.usage 'java-api' and found compatible value 'java-api'.- Required org.gradle.usage 'java-api' and found compatible value 'java-api'.- Required org.gradle.usage 'java-api' and found co
- Required org.gradle.api.attributes.Usage 'java-api' and found compatible value 'java-api- Required org.gradle.api.attributes.Usage 'java-api' and found incompatible value 'java-runtime- Required org.gradle.api.attributes.Usage 'java
- Required org.gradle.usage 'java-api' and found compatible value 'java-api'.- Required org.gradle.usage 'java-api' but no value provided.- Required org.gradle.usage 'java-api' and found incompatible value 'java-runtime
- Required org.gradle.usage 'java-api' and found compatible value 'java-api'.- Required org.gradle.usage 'java-api' and found compatible value 'java-api'.- Required org.gradle.usage 'java-api' and found co