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Cassandra allows you to sort your query results in reverse clustering order, but it comes at a cost. Cassandra has to read all partition rows/columns and sort them in-memory, making your queries slower and increasing load on the cluster.
The slowdown is proportional to the number of rows and columns you have, and it can become a serious problem if your partitions grow to thousands of rows and dozens of columns.
See more info on StackOverflow.
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Cassandra stores columns on disk in the clustering order of your table. Therefore, to get the performance, your queries with ORDER BY should match the table's clustering order.
For example, if you often query the newest data in the table, then you should set your clusterin...
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