ScyllaDB has same architecture than Cassandra. Let me correct slightly my previous sayings...
Cassandra commit log can be configured to be synchronous (commitlog_sync: group) in which case commitlog_sync_group_window allow to configure how long the write waits to trigger another (grouped) flush eg 20ms. This makes it viable in a mono-node setup at the cost of a bit of write throughtput. Tombstones are for multi-node setup, but yes being myself a Cassandra nerd, Cassandra architecture is very cool!We ran distributed app on systems with hundred-thousand users and million-per-day messages, so yes it is mature. The intent with the PG backend is to make it easier and cheaper to operate to make self hosting a viable option. -- Best regards, Benoit TELLIER General manager of Linagora VIETNAM. Product owner for Twake-Mail product. Chairman of the Apache James project. Mail: [email protected] Tel: (0033) 6 77 26 04 58 (WhatsApp, Signal) Le sept. 30, 2026 8:45 AM, de Ilya Terskov <[email protected]>Well thats bad, there no DB with CQL compliance (like ScyllaDB) but for standalone? :c i like idea of Tombstones even sounds cool and mechanics too and as i understand disturbed-app better tested? ср, 30 сент. 2026 г. в 12:06, Benoit TELLIER via server-user < [email protected]>: > Answer: very bad > The point is that Cassandra is a distributed system, and relies on it for > data safety. > Eg the commit log is fsynced periodically, and reliability is achieved by > replicating to other nodes. In mono node setup, this 'eans a fault leads to > data loss. > Cassandra make big compromise which allow eg running 8 James on top of 20 > Cassandra for a critical system, but it comes at a price: harder > programming model and eventual consistency semantics.... > -- > > > Best regards, > > Benoit TELLIER > > General manager of Linagora VIETNAM. > Product owner for Twake-Mail product. > Chairman of the Apache James project. > > Mail: [email protected] > Tel: (0033) 6 77 26 04 58 (WhatsApp, Signal) > > > > Le sept. 30, 2026 1:30 AM, de Ilya Terskov <[email protected]>Good > morning guys! > > Learning about Cassandra make me really wanna try use it, how it good with > standalone single server? I see in 5.x and 6.x versions it became much more > stable and got acid right? Compared to postgres its same level of stability > in terms of power outrage? > >
