Nt1330 Unit 4 Case Study

In order to recover the secret image from the mosaic image, embed relevant recovery information into the mosaic image. The information required to recover a tile image T which is mapped to a target block B includes:

In Windows Server 2012 to add a new website you must first open the Internet Information Services Manager (IIS Manager). When that window comes up there is a section on the left hand side that has a few selections. Choose the one that is the local host. You can see which one is by hovering over it. Expand the group and there will be a selection for “Sites” in it. There you can see what sites have already been created. Right click in an open space in the left hand menu and select “Add Website…” to begin creating a new website. A menu will appear with a box to enter the site’s name. Next select a physical path for the site to read from. Make a folder somewhere and place an html document inside of it. For this example I placed

Through the SAN, multiple paths are created to all data, so that failure of a server never results in a loss of access to critical information. Enterprise data storage has the story of transitions from one medium to another as the IT industry searched for ways to hold data and deliver access to it fast enough to keep processors busy. Here, the following are the statistics of earlier storage devices.

It determines which physical path the data takes, based on the network conditions, the priority of service, and other factors.

By separating the data into identifiable blocks, the information can be easily located. (1) Each grouping of data, which takes its name from the method of organising paper-based information, is referred to as a “file”. The file system is comprised of two specific parts: a collection of files and a directory structure, which provides data about and organises all of the files in the file system. (3) Some filesystems will be used on local data storage devices, whereas others provide access over a network, through a network protocol such as NFS. (2)

This paper proposes the Google File System (GFS). They introduced GFS to handle Google's massive data processing needs. GFS considers the following goals: higher performance, scalability, reliability and availability. However, it's not easy to reach these goals, there are many obstacles. Thus, in order to tackle challenges, they have considered using constant monitoring, error detection, fault tolerance, and automatic recover to tackle component failures that can affect the system's reliability and availability. The need to handle bigger files is becoming very important because data is keep growing radically. Therefore, they considered changing I/O operation and block sizes. They also consider using appending operations rather than

Back in the early days of the Internet, nobody would have predicted that the Internet would grow to the size, scope, and usefulness that it did. When the Internet was first established, Internet Protocol Version 4 (IPv4) was the standard, and only allowed for 4.3 billion possible addresses. For the time, that number was enormous and seemed like it would be more than enough to handle the network traffic that was predicted.

GlusterFS is scalable file system which is implemented in C language. Since it is an open source its features can be extended [8]. Architecture of GlusterFS is a powerful network written in user space which uses FUSE to connect itself with virtual file system layer [9].

Where is a very large, integrated collection of data in a Server, held? Yes, the Storage Spaces. These Storage Spaces lets us combine individual hard disks into storage pools and these can then be managed as a single entity. Storage Spaces is a technology that groups the storage pools and the storage disks which will enable the virtual storage capabilities in Windows and Windows Server (Microsoft Corporation, n.d). The available capacity in the storage pools are then used to create virtual disks which are called storage spaces. Firstly in this paper, I would like to provide an overview of the new Storage Spaces functionality and the Storage Space types in Windows Server 2012. Secondly, I would like to discuss about the fault tolerance and

A file system (sometimes written filesystem) is the method used to control the storage and retrieval of data on a storage medium. (4) It determines the way in which ‘files’ are named and how they are logically organised on a disk or partition. (5) Without a file system, data held on a storage medium would be one large block, with no method of determining the location of specific pieces of information. By separating the data into identifiable blocks, the information can be easily located. (1) Each grouping of data, which takes its name from the method of organising paper-based information, is referred to as a “file”. The file system is comprised of two specific parts: a collection of files and a directory structure, which provides data

It represents a dynamic data placement system for partition-based DBMSs that support ACID transactions (local or distributed). It does so by explicitly considering the affinity between partitions, which indicates the frequency in which they are accessed together by the same transactions. Accordion estimates the capacity of a server by

The use of paging, both simple and demand, was a solution to previously used schemes of having either unequal fixed-size or variable sized partitions, which lead to internal and external fragmentation respectively. The difference between paging and these fixed and dynamic partitioning methods is

Data striping is a technique that advocates data partitioning across multiple storage nodes and then clients can retrieve stripes in parallel directly communicating with storage nodes. We used this technique to go beyond the file size limitation of the underlying cloud storage and gain high performance.

Author talks about the complexity of the storage system. Storage system is categorized by performance, energy efficiency, durability and many more. There is a need to evaluate the storage system with the cost perspective. Cost model was built and the system was evaluated through various workloads and parameters. Digital data has been growing rapidly and in order to satisfy the needs of more storage and one need to save the longer data storage cost. This study to evaluate the storage system was carried on by developing a device mapper which was the combination of HDD and SSD for Linux kernel where SSD can either be used as a cache or as a storage of hot data. Behavior of the system was measured under various configuration. Moreover, a cost model was built which covered different aspects like energy, power costs, replacement costs and much more. SSD proved out to be very costly as a short term solution but less costly in the long run. SSD was used as a cache for some workloads which was less costly than using it as a hot storage. There were few results obtained which showed that for few workloads, SSD is the only possible solutions which seems to be costly when seen for the short term but it proves out to be cheap when considered in the long run. It’s very important that the future storage is evaluated on the basis of

The main functions that every file system should have are efficient organization of data quick storage and retrieval