A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : pNFS Problem Statement
Author(s) : G. Gibson, P. Corbett
Filename : draft-gibson-pnfs-problem-statement-01.txt
Pages : 12
Date : 2004-7-20
This draft considers the problem of limited bandwidth to NFS servers.
The bandwidth limitation exists because an NFS server has limited
network, CPU, memory and disk I/O resources. Yet, access to any one
file system through the NFSv4 protocol requires that a single server
be accessed. While NFSv4 allows file system migration, it does not
provide a mechanism that supports multiple servers simultaneously
exporting a single writable file system.
This problem has become aggravated in recent years with the advent of
very cheap and easily expanded clusters of application servers that
are also NFS clients. The aggregate bandwidth demands of such
clustered clients, typically working on a shared data set
preferentially stored in a single file system, can increase much more
quickly than the bandwidth of any server. The proposed solution is
to provide for the parallelization of file services, by enhancing
NFSv4 in a minor version.
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