Netezza

Netezza Mako Architecture: N3001 Technical Specification

IBM PureData System for Analytics N3001 or Netezza Mako Architecture is the next generation of the PureDataTM System for Analytics family of appliances that is powered by Netezza technology. The Netezza Mako architecture integrates database, server (High available RH Linux Servers), storage (disks), and advanced analytic capabilities into a single, easy-to-manage system. The N3001 series servers includes hardware with an accelerated massively parallel-processing design that is specifically optimized for running complex analytics on large data volumes at very high speeds. The Netezza Mako server includes the design that is specifically…

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February 21, 2017
Netezza

Netezza Striper Architecture: N2001 Technical Specification

IBM PureData System for Analytics N2001 or Netezza Striper is a purpose-built, standards-based data warehouse and analytic appliance. The Netezza striper architecture integrates database, server (High available RH Linux Servers), storage (disks), and advanced analytic capabilities into a single, easy-to-manage system. The Netezza Striper includes the design that is specifically designed for running complex analytics on large volumes of data sets (petabytes of data) at high speed. Netezza Striper Architecture The IBM PureData System for Analytics N2001 series data warehouse appliances increases the storage capacity and performance of the Netezza TwinFin models. Within…

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February 21, 2017
Netezza

nzhealthcheck Command to identify Netezza Health Check

You can perform the Netezza health check by running nzhealthcheck command. The Netezza health check is a report on how well the system is performing. Read: Netezza Architecture nzhealthcheck Command to identify Netezza Health Check To perform Netezza health check you have to login as an nz user and run command: nzhealthcheck You don’t have to pass any parameter to the above command. The output of the command presents general system information in the section MINI SYSINFO and information about the issues found in the section Failures. You can easily identify the information…

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November 7, 2016
Netezza

Netezza Failover – High Availability Architecture

Netezza appliance include necessary components to function seamlessly in the event of any hardware issue so that its availability is more that 99.99%. This is called Netezza high availability architecture that perform seamlessly in case of Netezza failover. There are two host in a cluster in all Netezza appliances so that if one fails other once can take over the task that is being carried out. Netezza Failover - High Availability Architecture Overview Netezza appliance uses the Linux-HA (high availability) and Distributed Replicated Block Device (DRBD) for the host cluster…

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October 31, 2016
Netezza

How Netezza Update Records in Tables?

Netezza update records operation is costlier. IBM Netezza does not perform updates, but rather does deletes the records and inserts updated values. When you run nzsql command to update record, Netezza marks the record being updated as logically deleted by setting current transaction value to the deletexid field, but does not delete it. This ensures that the database system adheres to the ACID properties of RDBMS SQL standards. How Netezza Update Records in Tables? Each record in Netezza contains two slots, one for createxid another for deletexid. Deletexid allows you…

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October 5, 2016
Netezza

Netezza Encrypt Password with nzpassword Command Utility

Database user accounts must be authenticated during access requests to the IBM Netezza database. You can secure the password by using Netezza encrypt password facility. Local authentication requires a password for every account which connects to the Netezza server. You must enter the clear text password, when you use Netezza CLI commands. You can set the environment variable NZ_PASSWORD to avoid the type of password every time but this variable also stores the clear text password. Read: Commonly used Netezza Utility Netezza Best Practices to Improve Performance Netezza nzsql Commands and…

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October 4, 2016
Netezza

Netezza Cross Database Access and its Restrictions

Netezza cross database access does allows you to execute the objects such as tables, view, synonyms that are available on the same Netezza server. You can can INSERT, UPDATE or DELETE data from current database by referring objects in other database on same server. For example, TRAINING1.ADMIN(ADMIN)=>SELECT * FROM TRAINING1..TEST1; Read: Access Netezza Database, Tools and Examples Netezza nzsql Command and its Usage Netezza Synonym Best Practices and Examples Referencing Database Object from other Database To access objects in other databases on the same Netezza system, you must use three-level…

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September 28, 2016
Netezza

Netezza WITH Clause Syntax and Examples

If you have requirement to reuse the piece of query result in same query, then you can use the Netezza WITH clause. You can also use the WITH clause to improve the speed for Netezza complex sub-queries and improve overall performance. This is also called the sub query factoring and you can use it when sub query is called multiple times. You can use the WITH Clause command to run multiple sub queries in a SELECT statement. The main advantage of Netezza WITH clause is, you can use it wherever…

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September 12, 2016
Netezza

Download and Install Netezza SQL Extensions Toolkit

The Netezza SQL Extensions toolkit is an optional package that contains additional SQL functions for IBM Netezza data warehouse appliances. The Netezza SQL Extensions toolkit contains various functions and regular expressions that are useful in day to day computations. You can download this package from the IBM site and install to particular database. Read: Netezza Advanced Date Functions and Examples dasdas Download the Netezza SQL Extensions Toolkit Login to IBM fix central site given below and download sql-ext-version.tar.gz file. Download Extension toolkit here Once the software is downloaded copy that…

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September 9, 2016
Netezza

Netezza NZPLSQL Control Structures: IF, LOOP, WHILE, FOR and EXIT

Netezza NZPLSQL control structures are a useful and important part of the NZPLSQL language. You can use Netezza NZPLSQL control structures to perform some critical decisions based on data and manipulate SQL data in a flexible and powerful way. You can use the Netezza control structures only in procedures. There are two Netezza NZPLSQL control structures: Conditional control and Iterative control Read: Working with Netezza Stored Procedure nzsession command Netezza RECORD Type Variable, Usage and Examples Netezza Conditional Control You can use the IF statement to perform particular task based…

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September 8, 2016