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<!------ End Box ------> - - - </TD> - <TD WIDTH=15><IMG SRC="/inc/img/pixel.gif" WIDTH="16" HEIGHT="16" BORDER=0 ALT=""></TD> - <TD ALIGN=left valign=top><IMG SRC="/inc/img/pixel.gif" WIDTH="140" HEIGHT="10" BORDER=0 ALT=""> - -<!-- title --> -<TABLE background="/inc/img/redline.gif" CELLSPACING=0 CELLPADDING=0 BORDER=0 width=100%><tr><td> -<A HREF="/docs"><img src="/inc/img/t_docs.gif" ALT="docs" HEIGHT=20 BORDER=0></A> -</td><td><IMG SRC="/inc/img/pixel.gif" WIDTH="1" HEIGHT="1" BORDER=0 ALT=""> -</td></tr></table> - -<!-- End header --> - - -<!-- NeL Network Library : Features --> -<table width=100%><tr><td align=left><b>NeL Network Library : Features</b></td><td align=right><b></b></td></TR></TABLE> - - -<H2>Introduction</H2> -<P>The first objective of NeL's network library (NeL Net) is to provide a complete OS-independent data transfer API that abstracts system specific code and provides mechanisms for complete control of bandwidth usage by the application code.</P> -<P>NeL Net has a further objective of providing a complete toolkit, comprising further layers of library code and core service implementations, for the development of performance critical distributed program systems for massively multi user universe servers. </P> - -<H2>Features</H2> -<H3>General Features</H3> -<UL> -<li>A layer based architecture with API access to every layer -<LI>Client application API -<LI>Encapsulation of process of connection to Shard Front End -<LI>Encapsulation of buffering and data transmission to Shard Front End -<LI>Encapsulation of reception and decoding of messages within data packets received from shard -<LI>Current implementation is based on TCP/IP -</UL> - -<H3>Shard Back End application ('service') Framework and API</H3> -<UL> - <LI>Framework for developing new services - <LI>Abstraction of inter-service connections with disconnection and reconnection management - <LI>Management of transmission of messages to other services (with buffering) - <LI>Management of reception and treatment of messages from other services (with buffering) - <LI>Management of time synchronisation - <LI>Management of log messages with consolidation and filtering tools - <LI>Centralised shard administration and management - <LI>Current implementation is based on TCP/IP -</UL> - -<H3>Shard Front End application API</H3> -<UL> - <LI>All features pertaining to back end services - <LI>Multi-threaded client-communication management for large numbers of client connections - <LI>Separation of incoming messages from the shard back end and incoming messages from clients - <LI>Login authentication - <LI>Mechanisms for monitoring growth of output data packets to the application program - <LI>Current implementation is based on TCP/IP -</UL> - -<H3>Login/ logout management</H3> -<UL> - <LI>Automated system fo registration of shards with Login Manager - <LI>API for connection of client application to Login Manager, for login and password authentication and for valid shard list retrieval by the client. - <LI>API for selection of a shard (for an authenticated user), selection of least loaded front end server on the shard for client connection and secure system for establishing the client connection. -</UL> - - -<H3>On the fly backup management (to be developped)</H3> -<UL> - <LI>Management of a backup schedules and shard backup synchronisation - <LI>Standalone service dedicated to reception and secure storage of backup data (with concept of transactions and data coherency) - <LI>Service API for backing up data -</UL> - -<H3>Future Spec enhancements (to be developped)</H3> -<UL> - <LI>Multi-threaded application support - <LI>Add a UDP channel from Client to Shard front end - <LI>Investigate ways of adding a UDP channel from shard to client (looks tricky) - <LI>Add support for data compression - <LI>Optimisation of communication between services running on the same server (via pipes and/ or shared memory) -</UL> - - -<!-- footer --> -<BR><FONT Size=+5> </FONT> -</TD> -<TD WIDTH=15><IMG SRC=/inc/img/pixel.gif WIDTH=15 HEIGHT=15 BORDER=0 ALT=""></TD> -</TR> -</TABLE> - -</BODY> -</HTML>
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