Kaushik Iska: What is direct I/O, and why does ClickHouse Managed Postgres use it for backups?
What is Direct I/O, and why would a managed Postgres care about it when taking a backup? Every day, a backup copies your whole database, hundreds of gigabytes, off the same NVMe drives that are answering your queries, and ships it to object storage. Linux treats those reads like any other file…