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Effective Data Backup System Using Storage Area Network Solution Effective Data Backup System Using Storage Area Network Solution Ume, L.E. Department of Computer Science, Ebonyi State University, Abakaliki, Ebonyi State, Nigeria Correspondence e-mail: [email protected] Abstract One of the most crucial benefits of the computer system is its ability to manage data send to it for processing. An aspect of data management that all other aspects hinge upon is data storage and retrieval. Data loss has rendered many firms bankrupt. The primary cause of data loss is lack or non- existent of data backup. Storage Area Network Solution (SANS) is internet-based software which will collect clients data and host them in several locations to forestall data loss in case of disaster in one location. The researcher used adobe Dreamweaver (CSC3) embedded with PHP incorporated with MySQL database technology to develop the application. The objectives of the research were realized. Keywords: Backup, Storage area network, Data, Effective and Data loss 1.0 Introduction Storage Area Network (SAN) is a high- (NAS) systems. SAN evolved from the speed sub-network of shared storage concept of taking storage devices and devices. A storage device is a machine that therefore storage traffic, off the LAN and contains nothing but a disk or disks for creating a separate back-end network storing data. A SAN’s architecture works in designed specifically for data. This is a a way that makes all storage devices contrast to the use of a traditional LAN for available to all servers on a LAN or WAN. providing a connection for server-storage, a As more storage devices are added to a strategy that limits overall network SAN, they too will be accessible from any bandwidth. SANs address the bandwidth server in the larger network. In this case, the bottlenecks associated with LAN based server merely acts a pathway between the server storage and the scalability limitations end user and the stored data. A storage area found with SCSI bus based network can use existing communication implementations. SANs provide modular technology such as IBM’s optical fibre scalability, high-availability, increased fault ESCON or use fibre channel technology. tolerance and centralized storage Some SAN system integrators liken it to the management. These advantages have led to common storage bus (flow of data) in a an increase in the popularity of SANs as personal computer that is shared by different they are quite simply better suited to address kinds of storage devices such as a hard disk the data storage needs of today’s data or a CD-ROM player [6]. intensive network environments. Because Storage area network support disk stored data does not reside directly on any of mirroring, backup and restore, archival and a network’s servers. Server power is utilized retrieval of archived data, data migration for business applications and network from one storage of data among different capacity is released to the end user. servers in a network. SANs can incorporate sub-networks with network-attached storage 1.1 Objective Of The Research West African Journal of Industrial & Academic Research Vol.14 No.1 June 2015 18 The volume of data generated by the use dedicated to an application, and visible as a of Information and Communication number of “virtual hard drives” (i.e. LUNs). Technology (ICT) tools to carry our routine Essentially, a SAN consolidates such duties has made adequate back-up and good storage islands together using a high-speed storage technology an imperative. They network. have been some existing innovation in this Despite such issues, SANs help to case which SAN is one of such that this increase storage capacity utilization, since study tends to critically analyze. multiple servers consolidate their private storage space onto the disk arrays. 2.0 Literature Review Common uses of a SAN include provision According to [8] describes a storage area of transactional accessed data that require network as similar to Local Area Network high-speed block-level access to the hard (LAN), but designed to handle large data drives such as email servers, databases and transfers. A SAN typically supports data high usage file servers. storage, retrieval and replication on business Storage Area Networks also tend to networks using high-end servers, multiple enable more effective disaster recovery disk arrays fibre channel interconnection processes. A SAN could span a distant technology. Storage Area Network location containing a secondary storage technology is similar but distinct from array. This enables storage replication either network attached storage (NAS) technology. implemented by disk array controllers by While SANs traditionally employ low-level server software or by specialized SAN network protocols for transferring disk devices. Since IP WANs are often the least blocks, a Network Attached Storage device costly method of long-distance transport, the typically works over TCP/IP and can be fibre channel over IP (FCIP) and iSCSI integrated fairly easily into home computer protocols have been developed to allow networks. SAN extension over IP networks. The Historically,[1] stated that data centers traditional physical SCSI layer could only first created ”Islands” of Small Computer support a few meters of distance not nearly System Interface (SCSI) disk arrays as enough to ensure business continuance in a direct-attached storage (DAS), each disaster [3]. Fig 1: Architecture of SAN West African Journal of Industrial & Academic Research Vol.14 No.1 June 2015 19 Sources: [2] Key Considerations in developing a Storage Area Network Design Storage Area Networks (SANs) can let several servers share storage resource and Security are often used in situations that require high With several servers able to share the performance or shared storage with block- same physical hardware, it should be no level access, like virtualized servers and surprise that security plays an important role clustered databases [4]. in a storage area network design. Most of Although SANs started out as a high-end this security work is done at the SAN’s technology used only in large enterprises, switch level; zoning allows you to give only cheaper SANs are now affordable even for specific servers’ access to certain LUNs, small and medium-sized business (SMBs). much as a firewall allows communication on specific ports for a given IP address. If any Uptime and availability outward facing application needs to access Because several servers will rely on a the SAN, like a website, you should SAN for all of their data, it’s important to configure the switch so that only that make the system very reliable and eliminate server’s IP address can access it. any single points of failure. In a typical storage area network design, each storage Replication and disaster recovery device connects to a switch that then With so much data stored on a SAN, connects to the servers that need to access your client will likely want you to build the data. If either paths fails, software can disaster recovery into the system. SANs can fail over to the other. Some programs will be set up to automatically mirror data to handle that failover automatically, but another site, which could be a failsafe SAN cheaper software may require you to enable a few meters away or a disaster recovery the failover manually. (DR) site hundreds of thousands of miles away. If the client wants to build mirroring Capability and scalability into the storage area network design, one of A good storage area network design the first considerations is whether to should not only accommodate your client’s replicate synchronously or asynchronously. current storage needs, but it should also be scalable so that your client can upgrade the 3.0 Research Methodoly and System SAN as needed throughout the expected Analysis lifespan of the system. You should consider A methodology is a formalized approach how scalable the SAN is in terms of storage to implementing the System Development capacity, number of devices it supports and Life Cycle (SDLC) that is, is a list of steps speed. and deliverables. There are many different One feature of storage area network systems development methodologies and design that you should consider is thin each one is unique because of its emphasis provisioning of storage. Thin provisioning on processes versus data and the order and tricks servers into thinking a given volume focus it places on each SDLC phase. There within a SAN, known as a Logical Unit are different types of methodologies and the Number (LUN) has more space than it emphasis they place on processes versus physically does. But this storage area data and the order and focus they place on network design requires more maintenance each system development life cycle. Some down the road, it’s best for stable of the types of methodologies are discuss environments where a client can fairly below: accurately predict how each LUN’s storage Structured System Analysis and Design needs will grow. Method (SSADM) West African Journal of Industrial & Academic Research Vol.14 No.1 June 2015 20 SSADM provides a systematic approach tool may portray progress (or lack of it) to analysis and design of information graphically. It may also serve as a repository technology (IT) applications. SSADM for or be linked to document and program covers those aspects of the life-cycle of a libraries containing the project's business system from the feasibility study stage to the plans, design requirements, design production of a physical design; it is specifications, detailed code specifications, generally used in conjunction with other the code units, test cases and results, and methods, which is concerned with the marketing and service plans. broader aspects of project management. Some of the benefits of CASE and In detail, SSADM sets out a cascade or similar approaches are that, by making the waterfall view of systems development, in customer part of the process (through which there are a series of steps, each of market analysis and focus groups, for which leads to the next step.
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