Suggest Cassandra data model for an existing schema
- by Andriy Bohdan
Hello guys!
I hope there's someone who can help me suggest a suitable data model to be implemented using nosql database Apache Cassandra. More of than I need it to work under high loads and large amounts of data.
Simplified I have 3 types of objects:
Product
Tag
ProductTag
Product:
key - string key
name - string
.... - some other fields
Tag:
key - string key
name - unique tag words
ProductTag:
product_key - foreign key referring to product
tag_key - foreign key referring to tag
rating - this is rating of tag for this product
Each product may have 0 or many tags. Tag may be assigned to 1 or many products. Means relation between products and tags is many-to-many in terms of relational databases.
Value of "rating" is updated "very" often.
I need to be run the following queries
Select objects by keys
Select tags for product ordered by rating
Select products by tag order by rating
Update rating by product_key and tag_key
The most important is to make these queries really fast on large amounts of data, considering that rating is constantly updated.
