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True convergence of network and storage.™ |
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Benefits
Storage Area Network (SAN) and Network Attached Storage (NAS) technologies have become a significant part of many IT datacenters. In general, among many advantages that they offer, cost reduction and centralized management of shared storage pools are key elements in their unique capabilities.
SANs are optimized for applications that work best with block-level I/O orientation such as SQL, Microsoft Exchange, CRM and others with similar requirements. Whereas, NAS solutions are more appropriate for applications that support file-level I/O orientation such as file sharing and office productivity file types.
Traditionally, SANs have used the expensive and complex Fibre Channel protocol for primary storage requiring a separate network for applications that demand performance and reliability. And, NAS has relied on the NFS (Network File System) and CIFS (Common Internet File System) protocols to transport data over the LAN backbone for less demanding nearline storage with a lower overall cost structure.
But now, standards-based iSCSI storage protocol which takes advantage of the existing ubiquitous IP networks with built-in performance and reliability has become the preferred choice for implementing storage networks.
Storage networking over existing Ethernet infrastructure lowers the overall costs by preserving the environment and eliminating the need for proprietary Fibre Channel (FC) based Storage Area Networks. iSCSI provides a universal end-to-end IP Storage solution set, no matter where the components reside on the Ethernet network.
iSCSI leverages the extensive pool of Engineering and IT talent with expertise in TCP/IP and Ethernet for deployment and support that ultimately reduces the complexity and the total cost of ownership. On average, iSCSI implementations cost a fraction of a comparable FC SAN without loosing many benefits.
With modern drive interfaces such as Serial Attached SCSI (SAS) and Serial ATA II (SATA II) and their ability to co-exist in a tiered configuration, coupled with high-performance RAID options, Multi-Gigabit as well as 10 Gigabit Ethernet interconnects, and the fusion of SAN and NAS technologies, many IT departments have comfortably positioned iSCSI as a solid choice for either Primary or Nearline storage to support their portfolio of business applications.
Standards-based iSCSI is simple, future ready with many enterprise capable benefits that make this technology:
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