wide-column-store

问题 A few days ago I read about wide-column stored type of NoSql and exclusively Apache-Cassandra. What I understand is that Cassandra consist of : A keyspace(like database in relational databases) and supporting many column families or tables (Same as table in relational databases) and unlimited rows. From Stackoverflow tags : A wide column store is a type of key-value database. It uses tables, rows, and columns, but unlike a relational database, the names and format of the columns can vary from

问题 How can I paginate data inside partition? I can`t use token for this, so I made microtime field with creation time and ordered records by it. Now I am slicing data using '<' and '>' and it makes a lot of constraints for my queries. Is there better way to do this? 回答1: For forward pagination, most of drivers (I definitely know about Java & Node.js) have notion of paging. You're basically execute your query, but set fetch size to value of number of entries that you want to have on page. You can

问题 Columnar database should store group of columns together. But Cassandra stores data row-wise. SS Table will hold multiple rows of data mapped to their corresponding partition key. So I feel like Cassandra is a row wise data store like MySQL but has other benefits like "wide rows" and every columns are not necessarily to be present for all the rows and of course it's in memory . Please correct me if I'm wrong. 回答1: If you go to the Apache Cassandra project on GitHub, and scroll down to the