A newly popular unit of data in the big data era is the petabyte. This is a measurement of the total amount of data that can be stored on a computer. The unit of measurement is not a barrel measurement like the gigabytes, kilobytes, or gigabytes used to designate units of data storage capacity. Rather it is a measurement of the amount of memory a computer has available at any given time. While terabytes were the largest unit of measurement before the introduction of the terabyte, they have since been surpassed by more compact and efficient technology like the gigabytes. But why is the gigabyte such a popular measurement for computing?
The first reason for the popularity of the petabyte is the fact that it represents a physical measurement. A petabyte is literally a measurement of physical memory. It is a definition which is very easy to understand for people who are used to working with very large amounts of memory on their computers, such as IT professionals. For these people, a petabyte represents the amount of memory that a computer can physically hold at any given time. Therefore, making data files more manageable, and easier to access, the petabyte has become an important standard.
Another reason that the petabyte is an increasingly popular unit of measurement is the fact that it makes it much easier to deal with large amounts of data. Rather than requiring drive platters to handle a handful of gigabytes of data, the modern PC requires enough space to safely store a petabyte worth of data. File systems that can efficiently manage this level of storage are an important ingredient for the success of a desktop PC. File sharing, and the ability to instantly access a file from a smart PC, is another feature of modern PCs which helps them to make data easy to manage.
In order to understand what makes PCs run a lot slower than they should when processing large amounts of data, it’s helpful to think about how large the typical desktops are. The typical desktop runs on a combination of main memory (RAM) and hard drive space. The RAM is a non-volatile type of memory which allows the PC to run applications and programs quickly and efficiently without having to wait for the PC to reload data onto the hard drive. The hard drive is a different sort of memory device, however, which is commonly referred to as a “non volatile storage” device because it is not subject to the same drawbacks as RAM. This means that the PC can save and recall data much faster than it can for the less expensive non volatile storage devices such as DVDs.
As the Internet grows increasingly important, the PC will have to keep up, or keep going, with the pace. Computers are excellent at saving data, but not so good at storing a large amount of information. MapReduce is a new solution to this problem created by Google’s data scientists, the Google data team. With the help of MapReduce, the PC will be able to intelligently control and redirect a web request to multiple low priority web servers, and then disperse the work load to a series of high priority Map Reduce clusters to speed up the process of Map Reduce.
Map Reduce involves a process in which a cluster of nodes are divided into two groups: primary Map Reduce nodes, which are in close proximity to each other, and secondary nodes. Each primary node acts as a direct Map Reduce slave, passing requests on to the secondary nodes. The second group of secondary nodes is called a cluster gateway, which receives requests from the primary nodes and passes them on to the Map Reduce primary nodes. The final set of nodes in a cluster is called the Map Reduce Outlier. These last set of nodes act as what is known as an outlier, receiving requests from Map Reduce slaves and forwarding the request on to the application end.
The biggest advantage of using Map Reduce as opposed to storing data directly in RAM is latency. A Map Reduce cluster has significantly lower latencies than a traditional RAM-based system. Latencies range between six to thirty milliseconds. A terabyte of RAM is currently the largest amount of memory that a server can use. Although many applications that store information on a desktop computer or laptop have a very low disk space, Map Reduce does not. The Map Reduce architecture is designed to work with very large amounts of memory, which it is very effective with.
It is very important for programmers to use Map Reduce whenever they need to reduce the amount of time needed for processing large volumes of data. With a fast system, it will be possible to process up to six terabytes of data per hour. Map Reduce can also be used to remove redundancy in the system, making it more efficient for handling large amounts of data that are not in a perfect order. With the usage of Map Reduce and the new concept of multi-structured novel databases, programmers will find it easier to handle a large amount of information in no time at all.