GNBD/VIA: A Network Block Device over Virtual Interface Architecture on Linux

Authors:
Kangho Kim;Jin-Soo Kim;Sung-In Jung
Affiliations:
-;-;-
Venue:
IPDPS '02 Proceedings of the 16th International Parallel and Distributed Processing Symposium
Year:
2002

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Abstract

This paper describes a design and implementation of GNBD/VIA, a Network Block Device (NBD) over Virtual Interface Architecture (VIA), and evaluates its performance on Linux-based cluster of PCs. VIA is a user-level memorymapped communication model which provides zero-copy communication by removing the operating system from the critical communication path. Typically, an NBD layer offers the abstraction of a storage media across the network. GNBD/VIA attempts to improve the performance of the NBD layer by employing the lightweight VIA communication mechanisms between NBD servers and clients. To our best knowledge, GNBD/VIA is the first implementation of NBD on VIA.GNBD/VIA outperforms the normal NBD placed on top of TCP/IP protocol stacks, and achieves the performance comparable to local disk devices, showing the read (write) bandwidth of 30.6MB/s (25.9MB/s) on the evaluation platform with UDMA100 hard disks and Emulex cLAN adapters.