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<p><b>YANFS</b> (<b>Yet Another NFS</b>), formerly <b>WebNFS</b>, is an extension to the <a href="Network_File_System" title="Network File System">Network File System</a> (NFS) for allowing clients to access a <a href="File_system" title="File system">file system</a> over the internet using a simplified, firewall-friendly protocol.

</p><p>WebNFS was developed to give <a href="Java_applet" title="Java applet">Java applets</a> and other internet enabled applications a way of accessing filesystem services over the internet. While NFS provides applications on <a href="Unix" title="Unix">Unix</a> with full filesystem semantics, not all of these might be needed in a distributed, read-only web environment. Conversely, access restrictions—such as requiring the use of restricted ports for originating requests—normally used in closed environments are not usually applicable in public distributed environments.

</p><p>In 2007, <a href="Sun_Microsystems" title="Sun Microsystems">Sun Microsystems</a> <a href="Open_source" title="Open source">open-sourced</a> its WebNFS implementation. The name was subsequently changed to YANFS (Yet Another NFS) to reflect the expanded scope of the project to include a server-side implementation.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>

</p><p>YANFS/WebNFS makes use of a well known port (port 2049 on both <a href="User_Datagram_Protocol" title="User Datagram Protocol">UDP</a> and <a href="Transmission_Control_Protocol" title="Transmission Control Protocol">TCP</a>) thus avoiding the overhead and unpredictability of using the <a href="Open_Network_Computing_Remote_Procedure_Call" class="mw-redirect" title="Open Network Computing Remote Procedure Call">ONC RPC</a> <a href="Portmap" title="Portmap">portmap</a> protocol. WebNFS adds public filehandles and multicomponent lookups to the NFS protocol.

</p><p>WebNFS has been specified by a number of RFCs:

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</style><a href="RFC_(identifier)" class="mw-redirect" title="RFC (identifier)">RFC</a> <a rel="nofollow" class="external text" href="https://www.rfc-editor.org/rfc/rfc2054">2054</a>: WebNFS Client</li>

<li><a href="RFC_(identifier)" class="mw-redirect" title="RFC (identifier)">RFC</a> <a rel="nofollow" class="external text" href="https://www.rfc-editor.org/rfc/rfc2055">2055</a>: WebNFS Server</li>

<li><a href="RFC_(identifier)" class="mw-redirect" title="RFC (identifier)">RFC</a> <a rel="nofollow" class="external text" href="https://www.rfc-editor.org/rfc/rfc2224">2224</a>: NFS URL Scheme</li>

<div class="mw-heading mw-heading2"><h2 id="Legacy">Legacy</h2></div>

<p>While WebNFS itself did not gain much traction, several important WebNFS features later became part of NFSv4, including use of port 2049, and the concept of a fixed "root filehandle" (which evolved from WebNFS public filehandles and allows exported filesystems to be accessed without needing the MOUNT protocol to learn their individual root handles first); both together allow NFSv4 to function without the Portmap service.

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<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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<li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><cite id="CITEREFShepler" class="citation web cs1">Shepler, Spencer. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20120103134830/http://blogs.oracle.com/shepler/entry/yanfs_is_the_new_webnfs">"YANFS is the new WebNFS (And is opensource as well)"</a>. theShepler. <i>Blogs.Oracle.com</i>. Archived from <a rel="nofollow" class="external text" href="https://blogs.oracle.com/shepler/entry/yanfs_is_the_new_webnfs">the original</a> on 2012-01-03<span class="reference-accessdate">. Retrieved <span class="nowrap">2012-02-15</span></span>.</cite></span>

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<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>

<ul><li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20120922084738/http://java.net/projects/yanfs">YANFS website</a></li></ul></div><div><div class="zim-footer">

This article is issued from <a class="external text" title="Last edited on 2024-12-23" href="https://en.wikipedia.org/wiki/?title=WebNFS&oldid=1264687638">Wikipedia</a>. The text is available under <a class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en">Creative Commons Attribution-Share Alike 4.0</a> unless otherwise noted. Additional terms may apply for the media files.

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