isolation

This tag is associated with 4 posts

Testing CloudNativePG Preferred Data Durability

Posted by Jeremy ⋅ October 5, 2025 ⋅ Leave a comment

This is the third post about running Jepsen against CloudNativePG. Earlier posts: First: shout out to whoever first came up with Oracle Data Guard Protection Modes. Designing it to be explained as a choice between performance, availability and protection was a great idea. Yesterday’s blog post described how the core of all data safety is copies of … Continue reading →

Losing Data is Harder Than I Expected

Posted by Jeremy ⋅ September 28, 2025 ⋅ 1 Comment

This is a follow‑up to the last article: Run Jepsen against CloudNativePG to see sync replication prevent data loss. In that post, we set up a Jepsen lab to make data loss visible when synchronous replication was disabled — and to show that enabling synchronous replication prevents it under crash‑induced failovers. Since then, I’ve been … Continue reading →

Run Jepsen against CloudNativePG to see sync replication prevent data loss

Posted by Jeremy ⋅ September 1, 2025 ⋅ 1 Comment

Are you in the Pacific Northwest? Want to learn more about topics related to this blog? At 3:15p on Thu Nov 13 in KubeCon Atlanta, I’ll be speaking with Leonardo Cecchi about distributed systems theory applied to standard open source postgres cluster reconfigurations. Jepsen is a testing framework for distributed systems that verifies safety guarantees … Continue reading →

Challenges of Postgres Containers

Posted by Jeremy ⋅ December 31, 2024 ⋅ Leave a comment

Many enterprise workloads are being migrated from commercial databases like Oracle and SQL Server to Postgres, which brings anxiety and challenges for mature operational teams. Learning a new database like Postgres sounds intimidating. In practice, most of the concepts directly transfer from databases like SQL Server and Oracle. Transactions, SQL syntax, explain plans, connection management, … Continue reading →