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Displaying articles for: April 2013

A perspective on the use of machine learning in management of complex applications

Data centers are the backbone of the 21st century economies. They are used to serve, process and store information about everything that happens electronically. That includes pretty much most of what we do today, both as consumers and as business entities. Everything is managed by data centers.

 

A data center includes the physical hardware – racks of computers, all connected through a physical network, internally and externally, to other data centers. But it is not just the hardware – there are the operating systems, middleware software, applications and services, which make up what we see as end users on our desktops, mobile phones or browsers. These are the layers of abstractions that make up complex applications and services that serve us in our daily lives.

 

Keep reading to find out how data centers assist with complex applications.

 

Post written by Ira Cohen

Labels: Analytics

Oracle HAKAN Factor During Partition Exchange

Amongst the best performance functionalities in the Oracle Enterprise server is good old table partitioning, introduced way back in release 8.0.

If you are an experienced Oracle DBA, you've probably used partitioning at one point or another. As you added/dropped/exchanged/split/merged/rebuilt partitions in your data warehouse, you were quite confident that nothing would surprise you…

Well, what does the following message tell you?

ORA-14642
Bitmap index mismatch for tables in ALTER TABLE EXCHANGE PARTITION
Error Cause:
The two tables in the EXCHANGE have usable bitmap indexes, and the INCLUDING INDEXES option has been specified and the tables have different hakan factors.

 

H a k a n factor???

Labels: Databases

Using Regular Expressions to Evaluate Path Variables in a Spring MVC controller

Spring is a very popular dependency injection framework. One of its sub-projects is Spring-MVC which helps developer create a robust web-tier in their application.

 

This article shows an advanced (and little-known) feature that allows handling a set of requests URIs by matching them against a regular expression.

DevOps maturity model - Part 2

As DevOps gains momentum in the industry, it is taking on various interpretations and approaches. This article is based on HP’s research and industry experience. It will propose a maturity model for DevOps, evaluate the key success factors and their evolution. Application owners, development teams and IT operations personnel who are looking to adopt DevOps or mature their DevOps practices, will be able to learn the DevOps landscape, assess their current position and work out their evolution path.

Part 1 describes the proposed DevOps maturity model. Part 2 contains several practical examples on how the model is used to estimate the maturity level of different activities, and what is required to move from one level to the next.

DevOps maturity model - Part 1

As DevOps gains momentum in the industry, it is taking on various interpretations and approaches. This article is based on HP’s research and industry experience. It will propose a maturity model for DevOps, evaluate the key success factors and their evolution. Application owners, development teams and IT operations personnel who are looking to adopt DevOps or mature their DevOps practices, will be able to learn the DevOps landscape, assess their current position and work out their evolution path.

Part 1 describes the proposed DevOps maturity model. Part 2 contains several practical examples on how the model is used to estimate the maturity level of different activities, and what is required to move from one level to the next.

Tags: Olga Kogan
Labels: DevOps

CSS is dead, long live SASS

Any developer that has written some CSS probably knows the hard, sad, truth: CSS is ugly. Not only is it ugly,but it is very hard to maintain and change. CSS was the big promise of the early '00 - no more tables and HTML attributes - just add some CSS to classes and ID and style your HTML neatly with clear separation between content and design. Unfortunately that just hasn't happend.

 

Keep reading to find out what SASS stands for and what it means for you.

 

This article has been written by Ran Bar-Zik

Tags: CSS| Ran Bar-Zik| SASS
Labels: SCSS| web

The magical life of JavaScript properties

Object properties are one of the fundamental structures of JavaScript.

In this article we will explore the magical world of those JavaScript properties with emphasis on their metadata

Labels: web

Understanding the Async Await API - part 1 (.NET)

The new Async-await feature in the .NET 4.5 framework is great, it allows you to free up the main thread without breaking the usual code flow or losing readability, but it takes a bit of thinking to understand it fully. Here is a walkthrough, presenting answers to some of the common questions and explaining the misconceptions I encountered when I first used the API for the Await feature, and how it relates to the previously released Task Parallel Library (TPL).

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About the Author(s)
  • I've been all over the coding world since earning my degrees have worked several years in c++ and then several in java, finally setteling into c# about 7 years ago, where i spent a good amount of my time in Performance tweaking & memory debugging, as well as designing new solutions and hacking at old ones to stay in line. Computers never cease to amaze me, and i'm glad to have found a field where i get paid to do what i enjoy. some of my tools and thoughts are also stored in codeproject, and you are welcome to check them out there.
  • work as a Senior Technologist in HP Software ALM CTO office. Past experience include chief architect for Application performance management, QA manager for Business service management, developer for Real User management
  • This account is for guest bloggers. The blog post will identify the blogger.
  • Research Architect @HPSW, focused on what ALM means for developers, DevOps, user experience and other emerging practices. Previously was a functional architect and a developer in HP ALM and HP UFT products.
  • Seasoned architect with over 12 years of experience in the enterprise software business, contributing to setting the roadmap / vision, high level architecture and technology review, innovation management and product integration within HP Software portfolio.
  • Lior has over 15 years experience in the software industry in various roles – experienced in Enterprise Software and team build up . Lior Managed the HP Software ALM PCoE Group where he focused on the domain of application development and application performance management .
  • Malcolm is a functional architect, focusing on best practices and methodologies across the software development lifecycle.
  • Architect and User Experience expert with more than 10 years of experience in designing complex applications for all platforms. Currently in Operations Analytics - Big data and Analytics for IT organisations. Follow me on twitter @nuritps
  • CTO Office, Product Foundation Services, HP Software
  • Yaniv Sayers has over 15 years of experience in the IT and software industry, including software design, R&D and IT operations. Holds expertise in various spaces including IT operations, ITIL, ALM, Agile, Cloud, DevOps, Mobility and Software Architecture and Design. In current capacity Yaniv is a CTO in HP Software IT Management, responsible for planning and driving technology and innovations strategy with emphasized focus on solutions for agile development, DevOps, mobility and cloud.
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