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On the Interconnection Topology for Storage Area Networks
BibTeX
@MISC{Molero_onthe,
author = {Xavier Molero and Federico Sills and Vicente Santonja},
title = {On the Interconnection Topology for Storage Area Networks},
year = {}
}
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Abstract
Department d’Informatica de Sistemes i Computadors Clusters of workstations are becoming an interesting al-ternative to parallel computers for those applications with high needs of resources such as memory, processing powe< and input/output storage capacity. Also, the fast growth of data intensive applications has caused a change in the tra-ditional storage model. The server-to-disk approach is be-ing replaced by storage area networks (SANS). SANS are a separate network for storage, isolated from the messaging network and optimized for the movement of data between servers and storage devices. Depending on the required network size and the environment targeted for the SAN, different interconnection topologies may be advis-able, affecting both performance and cost. Moreove ~ for a given topology, the routing algorithm used by messages also influences network performance. In this paper we analyze the impact of network topol-ogy on both performance and cost of storage area net-works. This analysi,s is pe~ormedfor up */down * and mini-mal adaptive routin,g in the context of two different environ-ments: buildings and departments. We show that depending on the network topology and the routing scheme, differences in the pe~ormance/cost ratio may increase by a factor of up to 6. Moreove ~ we demonstrate that slightly modifiing the network topology, such as adding a few new links, we can noticeably improve the overall performance without signif-icantly affecting the total cost. 1.
Keyphrases
storage area network interconnection topology network topology messaging network storage area tra-ditional storage model network topol-ogy input output storage capacity routing scheme sistemes computadors cluster mini-mal adaptive routin data intensive application different interconnection topology different environ-ments fast growth separate network pe ormance cost ratio high need server-to-disk approach overall performance department informatica network performance required network size storage device new link total cost
