Access "Scaling SANs"
This article is part of the Vol. 3 No. 12 February 2005 issue of Storage managers reveal details on tape reliability
Vertical and horizontal scaling Vertical scaling is accomplished by replacing components with greater resources, such as switches with higher port counts. Horizontal scaling builds out a storage network with additional switches, inter-switch links (ISLs) and so forth. Storage area networks (SANs) must be able to scale as they grow to meet burgeoning storage demands. There are various techniques for scaling SANs from a switch and fabric perspective. The best technique is one that satisfies current storage requirements and accommodates future growth. The basic building block of a switched Fibre Channel (FC) storage network is the FC switch, which ranges in size from a few ports to hundreds of ports. Similar to Ethernet-based networks, an FC storage network (fabric) can be implemented using a single switch or as a fabric network with multiple switches interconnected using inter-switch links (ISLs). We'll focus on scaling individual FC SAN fabrics to add ports to support more servers and storage, and to improve performance. While there are various techniques for... Access >>>
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