Relatively speaking, retrieving data from hard disk drivers is always slow compared to CPU and memory access due to the mechanical nature of the magnetic disk. Disk arm movement is very expensive operation therefore operating systems use disk scheduling algorithms to reduce seek time. Below you can find a summary of some of the well
This is a summary of my notes on operating systems file allocation methods. In the context of operating systems file allocation refers to managing files on disk such that disk space is effectively utilized and files are accessed quickly. Contiguous Allocation All blocks of the file are consecutive on disk Deleting files leaves gaps Compacting
What is Virtualization? A virtual machine is an isolated runtime environment which consists from a guest operating system and applications. Virtualization enables a single computing system to look like many computers where multiple virtual machines can run on a single physical machine. The size and power of individual virtual machines is variable and configurable. Each
Introduction This is good news for donut lovers. We will develop a pixel shader to pixelate an input image and tile it with donut like shapes. We can control donut shape by specifying inner radius and outer radius. We can also specify the donut density which in turn determines the number of donuts used and
Introduction Welcome to another tutorial on creating Pixel Bender Shaders. Today we will create a flower image frame. The shader allows us to specify frame center, size, number of leaves and background color. It also allows us the shift and adjust the input image. Adobe Pixel Bender If you want to write an image shader
Introduction Today we are going to write a cool Pixel Bender Shader. We will create a heart image frame. The shader allows us to specify frame center, size, skew and background color. It also allows us the shift and adjust the input image. Adobe Pixel Bender If you want to write an image shader for
Introduction Welcome to another tutorial on Pixel Bender Shaders. In this tutorial we will create a solar like image frame. The shader allows us to specify frame center, size, background color, number and length of sun beams. It also allows us the shift and adjust the input image. Adobe Pixel Bender If you want to
Introduction In this tutorial we are going to learn how to write a pixel shader to create a circular frame for a given input image. The shader allows us to specify the circle center, radius and background color. It also allows us to shift the image to the left or right inside the frame. Adobe
Who said Geeks are not funny. On the contrary they are funny but the problem is when they have fun they do it in a geeky way. Google Search Fun Here is a short list of search queries you can try using Google Search. Try them and have some fun: Do a barrel roll Zerg
Perl Search for Files and Directories Perl Remove Directory Perl Extract File and Directory Names from Full Paths Perl Copy File Perl Command Line Options Perl Environment Variables Perl Check File Exists Perl Get User Input Perl Upper Case Perl String Comparison Perl Exit Error Perl Get Number of Lines of an Array Perl Change
