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Counting Keys In Cassandra

Blog post from DataStax

Post Details
Company
Date Published
Author
Richard Low
Word Count
1,143
Company Posts That Month
4
Language
English
Hacker News Points
-
Post removed?
No
Summary

Counting keys (rows) in Apache Cassandra is not straightforward due to its design principles focused on write optimization and avoiding reads during writes. While it's possible to get an estimate using 'nodetool cfstats', the exact count requires scanning through all rows, which can be time-consuming and resource-intensive for large datasets. Maintaining a manual count is also challenging due to issues like row deletes and replication consistency. It's recommended to evaluate if the count is truly necessary for your application before implementing any workarounds.

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