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If you're drawing using page units, transformations, and regions, it's likely that you're heavy into drawing If that's the case, you'll be interested in ways to optimize your drawings for responsiveness and smooth operation First and foremost, you'll want to avoid drawing anything that doesn't need drawing You can do that in one of two ways: redraw only what needs to be redrawn, or don't draw unnecessarily in the first place First, invalidate only the portion of your drawing surface that needs to be refreshed In other words, when drawing the internal state of your form or control, don't invalidate the whole thing if only a small part of the state has changed: float[] lotsOfNumbers; Region GetRegionWhereNumberIsShown(int number) {} public float OneNumber { set { lotsOfNumbers[1] = value; // Don't do this: thisInvalidate(); // Do this: thisInvalidate(GetRegionWhereNumberIsShown(1)); } } The Invalidate function takes an optional rectangle or region as the first argument, so you'll want to invalidate only the portion that needs redrawing, not the entire client area Now, when the Paint event is triggered, all drawing outside the invalid rectangle will be ignored: void NumbersForm_Paint(object sender, PaintEventArgs e) { for( int i = 0; i != lotsOfNumbersLength; ++i ) { DrawNumber(g, i); // Will draw only in invalid region } } Also, there's an optional second argument that says whether to invalidate children If the state of your children doesn't need updating, don't invalidate What's even better than having drawing operations ignored for efficiency Not drawing at all Sometimes the client area will be too small to show all of the state[4] When that happens, there's no need to draw something that lies entirely outside the visible clip region To determine whether that's the case, you can use the IsVisible method of the Graphics object, which checks to see whether a point or any part of a rectangle is visible in the current clipped region:.

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15, Distributed File System, discusses one of the greatest challenges in a distributed environment: managing data and making the data available to all users in a timely fashion The Distributed File System (DFS) consists of two components: Distributed File System Namespace (DFSN) and Distributed File System Replication (DFSR) 15 closes with a look at best practices to design a DFSR topology and how to troubleshoot and monitor the overall health of replication 16, Deploying Windows, starts with a brief history of deployment and then introduces the technologies required to deploy modern operating systems (OSs) Installing and con guring WDS is covered, along with the considerations of running WDS and DHCP together and separately After WDS installation is explained, the process of importing images is introduced and the process discussed Automated installations are key in large environments, and the process of creating an unattended answer file using the Windows System Image Builder is explained 16 also looks at creating custom images from reference installations and then maintaining the images by installing xes, additional drivers, and even language packs Finally, multicast deployments are explored 17, Managing and Maintaining Windows Server 2008, looks at the major tasks and utilities that relate to managing and maintaining Windows Server 2008 The majority of the chapter is spent exploring Server Manager: how to manage the roles and features of Windows Server 2008 using Server Manager and, more than just management actions, how Server Manager gives consolidated insight into each role and is a go-to point to troubleshoot 17 then looks at Windows Server Backup, the major changes in Windows Server 2008, and details on the Volume Shadow Copy Service (VSS) Patch Updates are critical to keeping your environment healthy and secure The chapter looks at the options for patching systems, their advantages and disadvantages, and nally, the Registry 18, Highly Available Windows Server 2008, looks at the two high availability features of Windows Server 2008: Network Load Balancing (NLB) and Failover Cluster Validating hardware for Windows Server 2008 clustering is shown, as well as the process.

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Ideally, services should run in full isolation With full isolation, they have their own server or virtual private server instances, completely separate code bases and repositories, and their own data stores Over time, a system could phase from one form of

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