WalShadow: Sub-second Postgres replication to ClickHouse from physical WAL

WalShadow promises near-real-time Postgres-to-ClickHouse replication by using physical WAL, delivering commit-to-visible latency of around 200 ms while reducing source-database overhead and eliminating much of the complexity of traditional CDC stacks. For CIOs and technology leaders, this could meaningfully improve operational analytics and data freshness while simplifying architecture by removing dependencies like logical replication slots, Kafka, and JSON-based normalization. IT organizations should evaluate how this shifts their data platform strategy toward lower-latency, lower-maintenance pipelines that can better support modern analytics and schema evolution at scale.