At its simplest, the difference between a nas storage abstraction and a san storage abstraction is that nas systems offer file system functionality to their clients and san systems do not. Storage area networks sans and network attached storage nas allow organizations to manage and back up huge file systems quickly. File storage types and protocols for beginners youtube. Basically what you need to know if if your computer can mount the drive space as presented by the sannas in question. Nas in general nas is less expensive to purchase and maintain, although a highend nas will cost more than an entrylevel san. Therefore, a nas device is also useful for the opposite reasonto offload local data to the network storage devices larger storage container. Sans are more complex to manage with fc sans on top of the complexity heap. Nas and san interfaces technologically, nas and san systems offer different abstractions to the software using them 1, 2. Performance analysis of nas and san storage for scientific workflow.
Using sans and nas w curtis preston published by oreilly isbn. Help for storage administrators pdf, epub, docx and torrent then this site is not for you. Preston exams each technology with a vendor neutral approach, starting with the building blocks of a san and how they can be assembled for effective storage solutions. Thats important, especially inside a storage array with 15 hard drives. In general nas is less expensive to purchase and maintain, although a highend nas will cost more than an entrylevel san. Pdf this chapter identifies characteristics, architectural concepts, technologies, applications, and marketplace of storage area networks sans. Anjan dave, principal storage engineer, lsi corporation. Ethernet media using an io protocol called iscsi is emerging in 2001.
Faced with the lack of a practical technology that would interconnect theses server, the industry gave birth to a high speed fibrechannel technology which in turn. Using sans, for instance, is a way to share multiple devices tape drives and disk drives for storage, while nas is a means for centrally storing files so they can be shared. An improvement on the traditional storage model is to use network attached storage nas. Figure1 middle where physical disk drives are attached to a server. This can be overcome, even reversed by the internal design using higher. Today, most sans use fibre channel media, providing an anytoany connection for processors and storage on that network. Pdf performance analysis of nas and san storage for scientific. If youre looking for a free download links of using sans and nas.