EEL6883_SEII_Spr07_ProjectTeam12

EEL6883_SEII_Spr07_ProjectTeam12 - DIFFSYNC A file...

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DIFFSYNC A file synchronization program CLASS PROJECT – EEL6883 BY ADAM RADWAN GARGI CHIPALKATTI
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FILE SYNCHRONIZATION Process of making sure that two or more locations contain the same up-to-date files One-way (Mirroring) or two-way file synchronization Useful for mobile workers, multiple computer users; used for backup purposes Version control tools and File synchronization tools Various existing solutions, none of which were found by OpenPublic Networks, LLC to be robust enough for production use in a distributed environment
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GOALS Develop a file synchronization program which is capable of working over a diverse range of geographical placement Must be capable of running securely over common public network backbone, such as the Internet Capable of two-way synchronization of files for changes to served web pages Ability for a non-functional server to gracefully degrade while other servers detect this and recover appropriately to keep services running
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RSYNC Open Source software for Unix systems Mirroring takes place with only one transmission in each direction Used to synchronize local directories or directories via a remote shell such as RSH or SSH Two checksums: a weak “rolling“ 32-bit checksum and a strong 128-bit MD4 checksum
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