Found 623 Articles for Data Storage

This article helps you to configure and add a new disk to the Linux box. This is one of the most common problems encountered by system administrators these days since the servers are tending to run out of disk space to store excess data. Fortunately, disk space is now one of the cheapest. We shall look at the steps necessary to configure on Red Hat Enterprise Linux 6. x to add more space by installing the disk.ContentsMounted Filesystems or Logical VolumesGetting StartedFinding the New Hard Drive in RHEL 6Creating Linux PartitionsCreating a Filesystem on an RHEL 6 Disk PartitionMounting a ... Read More

A “cloud” in the technological sense, can be defined as a huge online place for storing and accessing data and program files in the internet, instead of your computer hardware- like local disk. When we talk about storing and accessing data, our first concern is how secure is our data, how much can we rely on the cloud environment. Cloud environment is as safe as data stored in an individual data server.Cloud is the latest trend in technology and most of us store all data in cloud housed in Dropbox, Google Drive. Generally, people assume that all the data stores ... Read More

Computer programming entirely revolves around data. It is data over which all the business logic gets implemented and it’s the flow of data which comprises the functionality of an application or project. Hence, it becomes critical to organize and store the data for its optimized use and perform effective programming with good data model. From the surface, both data type and data structure appear to be the same thing, as both deal with the nature and organizing of data, but there is a big difference between the two. One describes the type and nature of data, while the other represents ... Read More

Linear Data StructuresA Linear data structure have data elements arranged in sequential manner and each member element is connected to its previous and next element. This connection helps to traverse a linear data structure in a single level and in single run. Such data structures are easy to implement as computer memory is also sequential. Examples of linear data structures are List, Queue, Stack, Array etc.Non-linear Data StructuresA non-linear data structure has no set sequence of connecting all its elements and each element can have multiple paths to connect to other elements. Such data structures supports multi-level storage and often ... Read More

JPEG and PNG both are a type of image format to store images. JPEG uses lossy compression algorithm and image may lost some of its data whereas PNG uses lossless compression algorithm and no image data loss is present in PNG format.Following are the important differences between JPEG and PNG.Sr. No.KeyJPEGPNG1Stands forJPEG stands for Joint Photographic Experts Group.PNG stands for Portable Network Graphics.2Compression Algorithm typeJPEG uses lossy compression algorithm.PNG uses lossless compression algorithm.3Image QualityJPEG image may lose some image data causing quality loss.PNG image is of high quality.4Image sizeJPEG image is generally smaller than PNG image of same image.PNG image ... Read More

In a computer system, several types of secondary storage devices like HDD, CD, DVD, etc. are used to store permanent data and information. These devices can be categorized into two types namely – magnetic memory and optical memory. A magnetic memory like HDD consists of circular disks made up of non-magnetic materials and coated with a thin layer of magnetic material in which data is stored. On the other hand, optical disks are made up of plastic and consist of layers of photo-sensitive materials in which the data is stored using optical effects. A major advantage of the magnetic disk ... Read More

Both Primary Key and Candidate key are used to get records from tables. These keys are also used to create relationships between tables. Both primary keys and candidate keys are used to identify the records uniquely in a table. Read this article to find out more about primary keys and candidate keys and how they are different from each other. What is a Primary Key? A primary key helps us to uniquely identify a record in a relational database. a primary key is a unique identifier for each record or row of data. It ensures that no two records ... Read More

Volatile memory and non-volatile memory are two distinct types of computer memory with significant differences in terms of their functionality and data storage characteristics. Volatile memory is used for temporary storage and loses its data when the power is removed, while non-volatile memory is used for permanent or long-term storage and preserves data even when the power is off. What is Volatile Memory? Volatile memory is a type of computer memory that requires a continuous power supply to retain data. This means that when the power is turned off or interrupted, the data stored in volatile memory is lost. The ... Read More

Both RAM and HDD are types of computer memory. RAM is used to store computer programs and data that the CPU needs in real time. RAM data is volatile and is erased once the computer is switched off. HDD, hard disk, has permanent storage and it is used to store userspecific data and operating system files. HDD data is static and remains in the computer even if computer is switched off. Read this article to find out more about RAM and HDD and how they are different from each other. What is RAM? RAM stands for Random Access Memory. ... Read More

In computers, several types of secondary storage devices like CDs, DVDs, Blue-Ray Discs, HDDs, etc. are used for permanent storage of data and information. Both CD and DVD are the types of optical storage devices whose operation is based on the optical effects. Both CD and DVD use red LASER to perform read and write operations. However, they are quite different from each other in many aspects. In this article, we will discuss all the important differences between CD and DVD. Let's start with some basics of CD and DVD. What is a CD? CD stands for Compact ... Read More