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No, it's actually not. Cassandra is not columnar db. It means if you need all user_id from your table Cassandra will scan all your data (e.g. 10PB) on disks. B
by flr_null 10y ago
No, it's actually not.
Cassandra is not columnar db. It means if you need all user_id from your table Cassandra will scan all your data (e.g. 10PB) on disks. But ClickHouse will only scan 1 column file (e.g. 10GB).
ClickHouse is Russian Kudu.