The role of databases has shifted significantly as modern applications must deliver real-time analytics, dashboards, and machine learning alongside low-latency transaction processing. Handling these diverse demands with a single relational database has become unsustainable under growing data volumes. Consequently, organizations are adopting specialized database architectures where multiple engines work together based on their strengths, allowing […] The post Postgres + ClickHouse Architectural Patterns appeared first on Severalnines.
Sometimes, we see ClickHouse queries that should normally complete in milliseconds take several seconds to finish or worse, time out entirely. When that happens, there is a good chance that the schema is the real culprit. The problem is often not the query itself, nor is it a hardware bottleneck. Instead, it can stem from […] The post ClickHouse Schema Design and Data Modeling appeared first on Severalnines.
Historically, relational databases did double duty. The same PostgreSQL / MySQL instance that handled your application’s writes also answered your business questions. A well-indexed schema, a few GROUP BY reports, done. And that works, right up until it doesn’t: the reports get slower, the dashboards start eating the same I/O budget as the application; or, […] The post Building a Modern Analytics Stack Around ClickHouse appeared first on Severalnines.
When people first deploy ClickHouse, their initial reaction is often surprise. Queries that used to take minutes now finish in seconds. Dashboards feel instant even when reading billions of rows. To see this in action, here is a simple aggregation query running against a 200 million row events table: ClickHouse delivers exceptional speed, scanning 200 […] The post Managing ClickHouse Resources in Multi-Tenant Environments appeared first on Severalnines.
For many organizations, migrating from Microsoft SQL Server to PostgreSQL is no longer only about reducing licensing costs. The transition is often part of a broader modernization initiative focused on improving flexibility, scalability, and operational efficiency. PostgreSQL has evolved into one of the most mature open-source database platforms available today. It is widely adopted across […] The post How to Migrate from SQL Server to PostgreSQL HA for Dockerized Apps appeared first on Severalnines.
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