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10 Mar 2014

A couple of recent articles in Wired got me thinking about just how social media services, and thus the value of the big data that they create, could be under threat from their own customers.

07 Mar 2014

The SLES 11 priority scheduler implements priorities and assigns resources to workloads based on a tree structure.   The priority administrator defines workloads in Viewpoint Workload Designer and places the workloads on one of several different available levels in this hierarchy. On some levels the admin assigns an allocation percent to the workloads, on other levels not.

How does the administrator influence who gets what?  How does tier level and the presence of other workloads are on the same tier impact what resources are actually allocated?  What happens when some workloads are idle and others are not?

This posting gives you a simple explanation of how resources are shared in SLES 11 priority scheduler and what happens when one or more workloads are unable to consume what they have been allocated.

26 Feb 2014

Learn how to unlock data in SAP® Enterprise Resource Planning (ERP) solutions to discover deeper business insights. Teradata Analytics for SAP® Solutions is the newest addition to Teradata’s portfolio of SAP® integration tools and services. This product demonstration shows out-of-the-box functionality from the powerful pre-built and custom reporting capabilities to the easy cross-functional integration of SAP® data.

 

07 Feb 2014

Translating descriptive dates, like last-week, with in line SQL code to achieve Partition elimination.

06 Feb 2014

An earlier blog post focused on simple steps to get started using the Teradata 14.10 Automated Statistics Management (AutoStats) feature.  One of the new capabilities that AutoStats relies on when it streamlines statistics collection is the new “Threshold” option.  Threshold applies some intelligence about when statistics actually need to be re-collected, allowing the optimizer to skip some recollections.  

Although you will probably want to begin relying on AutoStats when you get to 14.10, you don’t have to be using AutoStats to take advantage of threshold, as the two features are independent from one another.  This post will give you a simple explanation of what the threshold feature is, what default threshold activity you can expect when you get on 14.10, and what the options having to do with threshold do for you.  And you’ll get some suggestions on how you can get acquainted with threshold a step at a time.  

30 Jan 2014

.NET Data Provider for Teradata version 14.11.0.1 (or above) supports integration with Visual Studio 2012 and Visual Studio 2013. This exposes the .NET Data Provider for Teradata objects necessary for development of ADO.NET applications utilizing the Teradata Database within Microsoft Visual Studio 2012 and 2013.

21 Jan 2014

Many experienced SQL and procedure developers use SQL functions to perform common tasks and simplify their code narratives. The function concept is a good programming technique, but adopting it literally in a Set SQL statement may force the statement to execute as a serial process; that is, it can make parallel processing impossible.  This is one reason Teradata SQL does not allow functions to access tables.

20 Jan 2014

Most Teradata systems support different processing windows, each which has a somewhat different set of business priorities.  From 8 AM to 12 noon the most important work may be the Dashboard application queries.  But from 12 noon to 6 PM it could be the ad hoc business users.   At night maybe it’s the batch loads and reporting.   Planned Environments function within the TASM state matrix to support the ability to automatically manage changes to workload management setup during those different windows of time.

17 Dec 2013
Besides collecting statistics on your columns on your Teradata database, the compressing of the data to save disk space is a very important maintaining task. So why not connect these two tasks? The idea is to extract the values for the multi value compression of the columns out of the collected statistics.
 
16 Dec 2013

The following batches 5 rows of data, 2 of them with errors. The JDBC FastLoad PreparedStatement.executeBatch attempts to INSERT the batched rows into a database table but throws a JDBC SQLException. Here is how to capture the chain of JDBC FastLoad SQLException messages and stack trace from JDBC FastLoad PreparedStatement.executeBatch and the chain of JDBC FastLoad SQLWarning messages and stack trace from JDBC FastLoad Connection.rollback:

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