Is Cassandra DB free?

Related questions

1. What Kafka topics?
2. How does Cassandra write data?
3. How replication works in Cassandra?
4. What is Kafka in simple words?
5. What are the advantages of Cassandra?
6. Is Cassandra column based?
7. What is AWS Cassandra?
8. How does Kafka work?
9. Is Kafka free?
10. What is Cassandra DB used for?

Tags

1. #across
2. #store
3. #point
4. #providing
5. #handle
6. #apache
7. #large
8. #availability
9. #column
10. #management
11. #database
12. #single
13. #cassandra
14. #commodity
15. #servers
16. #amounts
17. #designed
18. #nosql
19. #source
20. #system
21. #failure
22. #distributed