Articles by Shiv Iyer

About Shiv Iyer

Open Source Database Systems Engineer with a deep understanding of Optimizer Internals, Performance Engineering, Scalability and Data SRE. Shiv currently is the Founder, Investor, Board Member and CEO of multiple Database Systems Infrastructure Operations companies in the Transaction Processing Computing and ColumnStores ecosystem. He is also a frequent speaker in open source software conferences globally.

From Snowflake to ClickHouse: How ChistaDATA Enabled the World’s Largest Ad Tech Platform’s Migration and Built an Optimal Real-Time Analytics Infrastructure

Shiv Iyer

Introduction The world of advertising technology is fast-paced, data-intensive, and requires real-time insights for efficient decision-making. In this case study, we explore how ChistaDATA, a leading provider of advanced analytics solutions, helped the world’s largest […]

Real-Time Analytics Strategy for Telcos

Shiv Iyer

Introduction: Real-Time Analytics for Telcos The telecommunications industry is experiencing unprecedented growth and transformation, driven by technological advancements, increasing customer demands, and evolving market dynamics. To stay relevant and competitive in this rapidly changing landscape, […]

Achieving Real-time Analytics with ChistaDATA’s ClickHouse

Shiv Iyer

Introduction: Achieving Real-time Analytics Once upon a time, in a rapidly evolving digital landscape, businesses faced the challenge of delivering real-time analytics to gain valuable insights and stay ahead of the competition. One company, ChistaDATA, […]

Do Parallel Query Execution Plans improve ClickHouse Performance?

Shiv Iyer

Introduction Parallel query execution in ClickHouse can have both positive and negative effects on performance, depending on the specific use case and the characteristics of the data set. Potential Impact on ClickHouse performance Here’s an […]

Direct Path Load and Space Management in ClickHouse

Direct Path Load and Space Management for Optimal ClickHouse Storage & Ingestion

Shiv Iyer

Introduction Space management and direct path load are important considerations in ClickHouse for optimizing storage efficiency and data loading performance. Here are some tips and tricks for space management and direct path load in ClickHouse: […]

Accuracy of Cardinality Estimates in ClickHouse Execution Plans

ClickHouse Performance: How to assess Accuracy of Cardinality Estimates in Execution Plans

Shiv Iyer

Introduction In ClickHouse, evaluating the accuracy of cardinality estimates in a query plan can be challenging since ClickHouse relies on different heuristics and sampling techniques to estimate cardinalities. Accuracy of Cardinality Estimates However, you can […]