Archives

The brain of any operating system is its kernel. But a computer with only an operating system(kernel) is of no use, because nobody really uses an operating system. The end user of a computer is always concerned about programs, and not the operating system.

What an operating system really does is to provide an environment, where these programs can run. So the only job of an operating system is to provide resources to program's, so that the program can complete its task. People forget the difference between programs and operating systems, simply because, modern day operating system installs a good number of programs along with the operating system itself.

Our introductory guide to NFS did not contain some major topics, that requires special attention when we talk about NFS. These topics must always be given an extra bit of care, while configuring NFS. We purposely skipped out most of the serious topics in NFS in that tutorial guide, because of the simple reason that they are serious topics and must always be discussed separate. For those who did not read our NFS introductory guide, i will recommend reading that before beginning this tutorial.

Read: NFS(Network File System) in Linux

During the infancy period of computer's, SUN Microsystems developed a technology, which made accessing files from other computer's over network easy. This technology gave a new dimension to access data through network, and is heavily used even today in organizations. The advantage of this technology is the fact that it made directories and partition's on remote system's available as if it is a local directory or file system.

Most people ask why is database so faster when compared to flat file entries of data. There are many reasons behind that, one of them is indexing. Of course the speed of the underlying disk subsystem's also plays a major role in increasing database speed. Due to the heavy use of Relational database in almost all companies that employ heavy database, it has become very important to understand the internal working of the database, or i must say what factors makes a database efficient in terms of performance.

Let's get back to some computer basics before getting inside indexing in databases.

The foundational building block of any software or a web based application is the data it holds. Imagine the scale and size of data that websites like twitter and Facebook deals with each day, as users are increasing day by day their database is becoming bigger and bigger each minute.

Each and every organization needs to store the very critical information about their product,users,sales etc in an organized way so that they can be retrieved later without pain. Advancement in computer and storage technology has catered this need very efficiently. System administrators deal with very big and critical databases in their day to day life. The major factor that increases the efficiency of retrieval of this data is the "the method used to organize the data".

Although Understanding concepts of RAID is very necessary, including configuration methods and explanation for a specific vendor based RAID controller is not advisable. Because different controller's from different companies use their own proprietry methods to configure hardware RAID.

So we have decided to include a thearitical study of RAID and configuration of different level's of software RAID in Linux. We have already included methods to configure Software raid level 0 & 1.

Read: Software Raid Level 0 configuration in linux

From the different level's of raid available, raid 1 is better known for redundancy without stripping. This level of raid employs mirroring, by completely replicating the entire data block by block on the one disk to the other.

The minimum number of disk required to create a raid 1 array is 2. Maximum disk number can go up to 32. Number of disk's used must always be an even number.

Different types of raid and its internal working is explained in the below post, along with a configuration post on raid 0 in linux.

Read: Raid Working: A complete Tutorial

RAID is one of the heavily used technology for data performance and redundancy. Based on the requirement and functionality they are classified into different levels. Selecting a level for your requirement is always dependent on the kind of operation that you want to perform on the disk.

We already have written an article about the differences and internal details of how different raid levels work. The exact same working model of RAID which is completely done by hardware controller's, can also be managed by software(But the efficiency and performance of a hardware raid is always better).

Read: Different Level's of Raid Explained

When a user is visiting a web page with the help of his web browser, there are multiple steps performed by the user's computer before finally presenting it to the user.

One of the main critical and highly used infrastructure in the internet is the DNS infrastructure. DNS infrastructure is maintained in a distributed architecture, which means there is no single point of failure. The primary purpose of DNS is to convert names(Domain names) into number's (IP address).

Read: How does DNS work

Creating and deleting new partitions in linux a very normal practice. In this post we will be going through simple steps to create a new partition in linux, format it and mount it at your required mount point.

This article will also take you through the steps to delete your required partition, view your hard drive geometry,display existing partition table,display the UUID of a partition and many more about partition creation ,view,help, partitioning command line help and troubleshooting.

The tools used in this tutorial are very as mentioned below.