read replicas

Assess

Techniques

Duplicate database nodes that serve read queries and follow a primary database.

Why it's here

Placed in Assess: 1 article(s) of evidence from 1 source(s), led by research-stage coverage, with 1 in the last 30 days. Confidence 24%. Low accumulated evidence, so it defaults conservatively pending more signal.

Evidence (1)

6Hacker News·7/16/2026research
How 768 servers can appear as one database
The article explains how relational databases such as Postgres can scale from a single server to hundreds of servers by using read replicas and, ultimately, database sharding. It highlights the main limits of vertical scaling and replication, especially write bottlenecks and data capacity constraints, and describes sharding as the path to handling petabyte-scale workloads.