I-D ACTION:draft-gibson-pnfs-problem-statement-00.txt

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	Title		: pNFS Problem Statement
	Author(s)	: G. Gibson
	Filename	: draft-gibson-pnfs-problem-statement-00.txt
	Pages		: 12
	Date		: 2004-2-9
	
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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