cassandra通过数据

请教下大家，cassandra 集群中gossip信息交换相关问题 1. 集群发现是通过seeds节点主动去pull呢还是节点各自固定频率交换信息； 2. 某个节点接受数据时，此时是主动push，还是按固定频率，节点pull获取信息。这个我没有找到相关官方文档，求教于大家告知下

Cassandra二级索引原理——新创建了一张表格，同时将原始表格之中的索引字段作为新索引表的Primary Key，并且存储的值为原始数据的Primary Key，然后再通过pk一级索引找到真正的值

1.什么是二级索引? 我们前面已经介绍过Cassandra之中有各种Key，比如Primary Key， Cluster Key 等等。如果您对这部分概念并不熟悉，可以参考之前的文章： [Cassandra教程] （四）使用Key的正确姿势对于Cassandra来说，一级索引就是Primary Key. 因为查询的时候，可以直接根据Key算出token然后直接获取对应的记录。而二级索引，作为...

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数据集成

数据集成（Data Integration）是阿里集团对外提供的可跨异构数据存储系统的、可靠、安全、低成本、可弹性扩展的数据同步平台，为400+对数据源提供不同网络环境下的全量/增量数据进出通道。

产品入门

产品动态

最佳实践