322 technical articles on Teradata, Snowflake, Databricks, SQL tuning and data warehouse architecture — written from production experience, not vendor decks.
To comprehend the issue of Teradata hash collisions, I will briefly explain how rows are allocated. If you are unfamiliar with Teradata Architecture or require a refresher, I suggest reading the following article beforehand: As you know, a hashing algorithm distributes a table’s rows to the AMPs. The Foundations The hashing algorithm accepts one or …
How to Abort the Teradata Rollback Executing a DML statement on a sizable table may trigger a prolonged ROLLBACK. In such cases, you must choose between waiting for the ROLLBACK to complete or terminating it. Cancelling a rollback avoids wasting additional resources, particularly when the system cannot run in parallel due to high skew, which …
Why is Teradata I/O so crucial? Minimizing Teradata I/O is a crucial aspect of performance tuning. IOs involve transferring data from storage to main memory, which is essential for Teradata to process data. Transferring data to the main memory is significantly slower than accessing data in the main memory or CPU cache. Minimizing IOs can …
Access the Amazon Redshift Documentation here: https://aws.amazon.com/de/redshift/
How Advanced Is The Teradata Columnar Solution? A Column Store is defined by three distinct properties: Why Is The Teradata Solution Great Even Though It Does Not Offer Columnar Processing? Assuming a standard query, a date range selection is frequently made with a WHERE condition imposing a date restriction. However, only a portion of the …
Teradata transitioned to the cloud to prevent disconnection from contemporary cloud-based databases. I will demonstrate the Teradata Cloud solution in AWS and how it addresses crucial aspects such as security, backups, and sizing.
Experienced Teradata users are familiar with the concept of a primary index. However, a new term has surfaced with the introduction of Teradata Release 15: Primary AMP Index. This blog post will demonstrate a Primary AMP Index’s benefits and optimal usage for improving load and query performance. First, let us examine Teradata’s approaches over the …
In this blog post, I will show you what you need to pay special attention to when switching from Teradata to Snowflake. We will analyze the impact of running DML statements (e.g., UPDATE or DELETE) in Snowflake and contrast it with Teradata’s Row Storage and Column Storage.
What Are Zero-Copy Clones? We are all familiar with creating table backups before performing specific operations. This is not a significant problem for smaller tables, as duplicates can be swiftly created and any errors can be rectified by reverting to the backup table. If the table is enormous, making a copy can take a long …
Introduction to Teradata in the Cloud Cloud databases are pressuring traditional data warehousing MPP systems. This blog post will illustrate the reasons for this and outline the pros and cons of each database system. The Architecture of an MPP Database System MPP database systems employ a shared-nothing architecture, wherein each node has its own CPU, …
Expert network for enterprise data platforms. Senior consultants, project teams built for your challenge — across Teradata, Snowflake, Databricks, and more.
📍Vienna, Austria & Jacksonville, Florida
Join 4,000+ data professionals.
Weekly insights on Teradata, Snowflake & data architecture.