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IRC Hacks $26.38 IRC (Internet Relay Chat) may very well turn out to be the world’s most successful hack. In 1988, Jarkko Oikarinen wrote the original IRC program at the University of Oulu, Finland. As he says in his foreword, "IRC started as one summer trainee’s programming exercise. A hack grew into a software development project that hundreds of people participated in, and then became a worldwide environment where tens of thousands of people now spend time with each other. I have found many of my friends through IRC and learnt a significant part of my present software engineering knowledge while using and working with IRC. That would not have been possible without learning from code examples and hacks from others." IRC has continued to grow in popularity since its inception. Millions of people from all over the world now use IRC to chat with friends, discuss projects and collaborate on research. With a simple, clearly defined protocol, IRC has become one of the most accessible chat environments, with clients written for a multitude of operating systems. And IRC is more than just a simple chat system it is a network of intercommunicating servers, allowing thousands of clients to connect from anywhere in the world using the IRC protocol. While IRC is easy to get into and many people are happy to use it without being aware of what’s happening under the hood, there are those who hunger for more knowledge, and this book is for them. "IRC Hacks" is a collection of tips and tools that cover just about everything needed to become a true IRC master, featuring contributions from some of the most renowned IRC hackers, many of whom collaborated on IRC, grouping together to form the channel #irchacks onthe freenode IRC network (irc.freenode.net). Like all of our Hacks books, there are many different ways to use "IRC Hacks," You can read the book from cover to cover, but you might be better served by picking an interesting item from the table of contents and just diving in. If you’re relatively new to IRC, you should considering starting with a few hacks from each progressive chapter. Chapter 1 starts you off by showing you how to connect to IRC, while Chapter 2 acquaints you with the everyday concepts you’ll need to use IRC effectively. Chapter 3 is all about users and channels, and introduces the first pieces of code. Chapter 4 shows you how to make useful enhancements to IRC clients. Chapter 5 is where you will learn the basics about creating IRC bots, with Chapters 6-12 introducing more complex bots that can be used for logging, servicing communities, searching, announcing, networking, managing channels or simply for having fun. Chapter 13 delves into the IRC protocol in more detail, and Chapter 14 demonstrates some interesting alternative methods for connecting to IRC. Finally, Chapter 15 will move you on to new pastures by showing you how to set up your own IRC server. This book presents an opportunity to learn how |
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COLORrail™ IRC $249.99 The COLORrail™ IRC is an RGB LED linear wash/effect that uses 10mm LEDs. The fixture is DMX controllable in up to 8 sections or the user can call upon a multitude of captivating auto and sound-activated programs. These programs include chases and runway effects that need to be seen to believed. |
When to Scale for SQL Server Optimization
DBAs have the responsibility of maintaining and improving database production environments. This includes making the decision of whether or not they will scale the hardware systems. Adding even more difficulty to this decision are factors like budgeting and time frames. It is not easy for DBAs to choose whether they would like to scale up or scale out.
Scaling up means to move databases and applications to a larger class of hardware with more powerful processors, more memory, and faster disk drives. High levels of system resource use may require you to scale up your production environment to ensure optimum end user experiences.
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Scaling out means to implement the use of federated servers where data is partitioned or replicated across them. For instance, you could partition CRM or ERP functionality on separate servers and partition horizontal data across various databases.
Consider SQL Server Performance Tuning
Before scaling up or out, you must be sure that it is required. Sufficient SQL server performance tuning could be a great help when making that decision. Numerous scalability and performance difficulties can be relieved with the proper SQL server optimization efforts. You should optimize SQL server databases and applications with wait time performance data and historical trend data before you decide to scale up or scale out.
SQL Server optimization can resolve performance bottlenecks like inefficient locking, unprepared SQL statements, poor indexes that lead to increased CPU loads, and memory or disk I/O utilization that are often incorrectly mitigated by scaling up on hardware.
Scaling Up or Scaling Out
Once you’ve optimized applications and databases and are still seeing performance issues, you must decide whether you need to scale up or scale out. Scaling up usually comes first. It can be quite expensive to scale up, but it is surely easier and more productive than scaling out. Scaling up is essentially upgrading slower hardware with new, fast equipment and/or adding additional hardware components to the current configuration.
If, once you have scaled up on hardware, your system is still experiencing performance issues, you should consider scaling out and implementing a federated server environment. The decreased load on individual servers should alleviate most remaining performance issues.
Scaling out is also an option when budget constraints prohibit hardware scaling. If you have enough, or nearly enough, server capacity already, expenditures will be greatly reduced. You should certainly do some research and determine if the cost savings is worth the complex nature of utilizing a federated server environment.
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Start By Optimizing, Follow up by Scaling
It is important to stress that the most efficient and least costly performance enhancements come from the databases and applications. Focusing your SQL Server performance tuning there usually eliminates the need for any type of scaling. Ensure that you have looked into every optimization option prior to purchasing hardware or implementing complex scaling options.