YugabyteDB is a distributed SQL database designed to overcome the challenges faced by PostgreSQL, including Disastrous Transaction ID (XID) Wraparound, Data Loss Likely During Failover, Inefficient Replication That Spreads Corruption, MVCC Garbage Frequently Painful, Process-Per-Connection = Pain at Scale, Primary Key Index Takes Up A Lot of Space, Major Version Upgrades Can Require Downtime, Cumbersome Replication Setup and Troubleshooting Process, Ridiculous No-Planner-Hints Dogma, and No Block Compression. YugabyteDB addresses these issues by employing a modern storage layer design, Hybrid Logical Time (HLC) for cluster synchronization, efficient sync replication, logical replication, per-column updates, one process per connection, log-structured merge-tree (LSM) with primary index structure, online upgrades, fully automated replication, and compression and encryption at rest and in transit. YugabyteDB is designed to be compatible with PostgreSQL, offering a scalable solution for cloud-native applications that require high availability and performance.