Workload Management with User Defined Functions and Table Operators
How does TASM enforce rules such as classification and workload exceptions against User Defined Functions? What about table functions and table operators, some of which do their work outside of...
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Cheetah - Distributed In-memory Dual-active Application Engine
Cover Image: Teradata has great perfomance in batch processing. As a typical OLAP system, Tereadata can't peform as well as OLTP in high concurrency real-time application. I wrote an open source...
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Statistics Collection Recommendations – Teradata Database 14.10
Cover Image: Statistical information is vital for the optimizer when it builds query plans. But collecting statistics can involve time and resources. By understanding and combining several different...
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Everything All the Time
Cover Image: During my first coding class, after the obligatory “Hello, World,” my assignment was to find the least cost path in a matrix of values (linear programming). The computer took some time to...
View ArticleWhen sample statistics go wild
The accuracy of sample statistics has been greatly improved over the last Teradata releases. So I usually try to use sample stats on most of the big tables and I found them to be reliable on many...
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Text Search pattern in Teradata with Java , SQLJ
Short teaser: Enhance Analytics, Text Seacrh Analytics, especially hadoop, Big dataCover Image: Unstructured data can be dealt with effortlessly in Teradata. Regular expression has been around for many...
View ArticleIdentifying Java Client Software
Beginning with Teradata Database 14.0 and Teradata JDBC Driver 13.10.00.21, the Client Attributes feature records a variety of information about the client system and client software in the system...
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A Closer Look at How to Set up a Parsing-Only Workload
When you think about priorities, you probably focus your attention on AMP work. Whether you are using Teradata Active System Management (TASM) or Teradata Integrated Workload Management (TIWM), AMP...
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Just a Little Bit More
Cover Image: The theme of this blog is an examination of forces that would disrupt existing data warehouse implementations. I categorize these as either long tail or black swan events.Data lakes (and...
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Example Java UDF for Table Hash Calculations
Short teaser: A Java UDF - with not good performance - is shared for a table hash calculationThere is a demand to have a functionality similar to the industry standard SHA256 hash function to condense...
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New, Simplified Approach to Parsing Workload Selection
Cover Image: As of Teradata Database 14.10.05 and 15.00.03, a simplified approach to determining which workload will support session management and parsing has been adopted This posting describes this...
View ArticleThe Teradata JDBC Driver's COP Discovery, LCC, Logon, and more
The Teradata JDBC Driver Engineering team receives a lot of questions about what happens when a JDBC connection is created. Let's clarify the concepts Laddered Concurrent Connect (LCC) versus COP...
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Using IOTAs to Determine the I/O Utilization of Your Workloads
I/O Token Allocations (IOTAs) are used in Teradata Database 14.10 with SLES 11 systems to enforce the I/O side of Workload Management Capacity on Demand (WM COD) and other SLES 11 hard limits.This...
View ArticleConfiguring Redrive and Recoverable Network Protocol in the .NET Data Provider
IntroductionThis blog will introduce the reader to a short description of Redrive and Recoverable Network Protocol in the .NET Data Provider and some of the restrictions that are present in supporting...
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How to Fix the Data Scientist Shortage
Cover Image: The amount of data that is now available for analysis is growing at an exponential rate. As the hardware to capture the data becomes cheaper, faster and omnipresent, the amount of data...
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Global Weights in SLES 11 Priority Scheduler
Think about the priority part of workload management for a minute.The settings that the administrator makes when defining priorities for different workloads are on the surface--things like workload...
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AMP Worker Task Resource Limits & Increased Load Limits for MLOADX
Cover Image: MLOADX is a new load utility enhancement introduced in Teradata Database 14.10 which is intended to overcome some of the limitations that are associated with standard MultiLoad. This...
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Teradata Basics: Parallelism
Cover Image: This “Teradata Basics” posting describes the current dimensions of parallelism in the Teradata Database, and how they work together. What is Query Parallelism?Executing a single SQL...
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Special Treatment For Users DBC and TDWM
Cover Image: If you are user DBC or user TDWM and you log onto a Teradata Database, you might get treated somewhat differently than other users. This posting describes what user DBC and user TDWM do,...
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TDPython Pivot
Short teaser: PoC which evaluated to TDPyton devobs approachCover Image: In July 2015 Eric shared on http://developer.teradata.com/tools/reference/teradata-python-module insights on the Teradata Python...
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