1. 卡桑德拉：
Cassandra 旨在处理许多商品服务器中的大量记录，提供过度的可用性而没有单一的故障因素。它是免费的、开源的、分布式的，它实际上是一个 NoSQL DBMS。
2. 弹性搜索：
它是一个开源的分布式搜索和分析引擎，可用于各种数据，具有近乎实时的存储和查找大量记录的能力。它支持Java语言。它是 Elastic Stack 最重要的元素，用于记录评估和可视化。它具有过度的可扩展性，并且执行操作的速度也过快，这使其成为用于数据分析、处理和可视化的轻松快捷的工具。
Cassandra 和 Elasticsearch 的区别：
| S.No. | Cassandra | Elasticsearch |
|---|---|---|
| 1. | It is created by Apache. | It is created by Facebook. |
| 2. | It is a NoSQL DBMS. | It is a distributed search and analytic engine. |
| 3. | It is more scalable than Elasticsearch. | It is having less scalable applications. |
| 4. | It does not have a feature of working with images. | Image work can be done with this. |
| 5. | Searching activity is not as quick as in Elasticsearch. | There is a quick searching activity which can be done with index basis. |
| 6. | It supports comparatively small scripts. | It supports comparatively large sort of scripts. |
| 7. | It does not work with transaction-related queries. | It can be work with transaction-related queries. |
| 8. | It is more flexible as compared to Elasticsearch. | It is less flexible as compared to Cassandra. |