For join datatypes, the parent allows re-indexing/adding/deleting specific children. However, using has_child or has_parent queries can have a significant impact on performance. If you need better performance, always use nested datatypes. Nonetheless, as long as you have to update, you need to re-index all children to their parent. The nested datatype approach is also easier to manage than the join datatype approach. You must be very careful while using the join datatype method because you can index children without a parent. Also, if you want to remove a parent, it is not an automatic cascading task to delete all of its children. You need to clean it up by yourself. On the other hand, if you want to update parent or child document, the join datatypes approach will be more convenient because you can update the values in the parent field or the child field...
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Wai Tak Wong is a faculty member in the Department of Computer Science at Kean University, NJ, USA. He has more than 15 years professional experience in cloud software design and development. His PhD in computer science was obtained at NJIT, NJ, USA. Wai Tak has served as an associate professor in the Information Management Department of Chung Hua University, Taiwan. A co-founder of Shanghai Shellshellfish Information Technology, Wai Tak acted as the Chief Scientist of the R&D team, and he has published more than a dozen algorithms in prestigious journals and conferences. Wai Tak began his search and analytics technology career with Elasticsearch in the real estate market and later applied this to data management and FinTech data services.
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Wai Tak Wong is a faculty member in the Department of Computer Science at Kean University, NJ, USA. He has more than 15 years professional experience in cloud software design and development. His PhD in computer science was obtained at NJIT, NJ, USA. Wai Tak has served as an associate professor in the Information Management Department of Chung Hua University, Taiwan. A co-founder of Shanghai Shellshellfish Information Technology, Wai Tak acted as the Chief Scientist of the R&D team, and he has published more than a dozen algorithms in prestigious journals and conferences. Wai Tak began his search and analytics technology career with Elasticsearch in the real estate market and later applied this to data management and FinTech data services.
Read more about Wai Tak Wong