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Scaling Celera's MOUNTAIN of DATA






Direct Attached Storage (DAS) Fast, but limited. With DAS, the physical storage device is attached directly to the server, so resident applications have immediate access to the data. Backup is very fast. Caveat: There is no direct connection to the network, and communication to clients must move through the server. Also, storage flexibility and capacity is limited. Direct attached storage is commonly used in small workgroups.  Network Attached Storage (NAS) One for all. NAS physical storage devices are on a shared network with other clients (servers, workstations, etc.). NAS devices are typically high-performance, single-purpose machines serving a mix of clients. They are well-suited to tasks such as Web cache and proxy, firewall, data storage combined with file serving and tape backup. Storage Area Network High-powered, but complex. A SAN is a collection of physical storage devices on a network dedicated to storage. SANs are data-centric, and because they're separate from traditional LANs, they avoid standard network traffic jams. Use of high-speed networks, such as fiber channel, can further reduce latency. SANs combine high capacity and fast communication, but they require significant IT manage-ment resources.
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