When would you choose LOCAL_QUORUM over QUORUM?

QUORUM requires a majority of replicas across all datacenters to respond, which means every read or write pays a cross-datacenter network round trip, even when the application only cares about consistency within its own region. LOCAL_QUORUM requires a majority only among replicas in the coordinator's local datacenter, avoiding that cross-region latency entirely.

Choose LOCAL_QUORUM for the common case of a multi-datacenter deployment where each region primarily serves its own local traffic and cross-datacenter replication exists mainly for disaster recovery or read locality, not for enforcing strict global ordering on every request. Reach for QUORUM only when an operation genuinely needs to reflect state across all datacenters immediately, which is rare and usually confined to specific coordination paths, since the latency cost of a full cross-datacenter quorum on every request is substantial at scale.

Invest now in Acorns!!! 🚀
Join Acorns and get your $5 bonus!

Acorns is a micro-investing app that automatically invests your "spare change" from daily purchases into diversified, expert-built portfolios of ETFs. It is designed for beginners, allowing you to start investing with as little as $5. The service automates saving and investing. Disclosure: I may receive a referral bonus.

Invest now!!! Get Free equity stock (US, UK only)!

Use Robinhood app to invest in stocks. It is safe and secure. Use the Referral link to claim your free stock when you sign up!.

The Robinhood app makes it easy to trade stocks, crypto and more.

Webull! Receive free stock by signing up using the link: Webull signup.