DatabasesInfoQ
Databases
Uber introduced a high-throughput financial ledger processing system designed to handle hot account write contention at scale. Using 250ms batching, Redis coordination, and optimistic atomic updates, the system supports 30+ updates per…
Percona ClusterSync for MongoDB (PCSM) replicates data between MongoDB clusters to keep migrations with near-zero downtime. Prior to version 0.9.0 it required the source and target to run the same major version, which ruled out the…
Most PostgreSQL outages that trace back to file descriptor exhaustion get misread as a database problem. The failure is one layer down: the kernel runs out of file descriptors and PostgreSQL takes the hit. This post covers how that happens…
Percona Transparent Data Encryption for PostgreSQL (pg_tde) is an open-source PostgreSQL extension that provides Transparent Data Encryption (TDE) to protect data at rest. pg_tde ensures that data stored on disk is encrypted and cannot be…