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{{Redirect|DAFS}}
'''Direct Access File System''' (DAFS) is a
[[Distributed file system|network file system]] that is based on [[NFSv4]] and the [[Virtual Interface]] (VI) data transfer mechanism. DAFS uses [[remote direct memory access]] (RDMA) to perform efficient network access to data in remote files. This lowers latency by reducing the number of steps needed to process and transfer remote data. [[File locking]] is cached on the client side, eliminating the need to access the file server for subsequent data access.<ref name=troppens_et_al2009/><ref name=toigo2004/>

The DAFS was initially developed by [[NetApp|Network Appliance Inc.]] An 85-member industry association named the DAFS Collaborative was assembled to complete the specification. With the draft release of v1.0, it was then passed to the [[Internet Engineering Task Force]] (IETF). Version 1.0 of the DAFS [[application programming interface]] was completed in 2001. The same year, a working version of DAFS was demonstrated using the [[Oracle database]].<ref name=kay2002/><ref name=collaborative/> DAFS beta version 1.0 is available from [[SourceForge]] under the [[BSD licenses|BSD license]]. It was last updated in 2004.<ref name=sourceforge/>

==References==
{{reflist|refs=

<ref name=troppens_et_al2009>{{cite book |author1=Troppens, Ulf |author2=Mueller-Friedt, Wolfgang |author3=Erkens, Rainer |author4=Wolafka, Rainer |author5=Haustein, Nils | pages=[https://archive.org/details/storagenetworkse00trop/page/n184 147]–148 | title=Storage Networks Explained: Basics and Application of Fibre Channel SAN, NAS, ISCSI,InfiniBand and FCoE |url=https://archive.org/details/storagenetworkse00trop |url-access=limited | edition=2nd | publisher=John Wiley and Sons | year=2009 | isbn=978-0-470-74143-6 }}</ref>

<ref name=toigo2004>{{cite book | first=Jon William | last=Toigo | year=2004 | page=69 | title=The holy grail of network storage management | publisher=Prentice Hall PTR | isbn=0-13-028416-5 }}</ref>

<ref name=kay2002>{{cite book | first=Russell | last=Kay | date=October 21, 2002 | title=QuickStudy: Direct Access File System | work=ComputerWorld | url=http://www.computerworld.com/s/article/75191/QuickStudy_Direct_Access_File_System | accessdate=2011-04-13 }}</ref>

<ref name=collaborative>{{cite web | title=Direct Access File System (DAFS) Protocol | work=DAFS Collaborative | url=http://www.dafscollaborative.org/ | accessdate=2011-04-13 }}</ref>

<ref name=sourceforge>{{cite web | title=DAFS, Direct Access File System | work=SourceForge | url=https://sourceforge.net/projects/dafs/ | accessdate=2011-04-13 }}</ref>

}}

[[Category:Distributed file systems]]
[[Category:Network file systems]]

Direct Access File System - Revision history

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