Ferris jMirror is a simple data synchronization application which will mirror the contents of one directory to another directory. Data synchronization made easy.

JMirror started as a coding exercise I would give to undergraduate computer science students as a way to get them familiar with programming in the Java language. The idea being the goal of the application is simple enough to understand yet coding it in Java is complex enough to get the familiar with Java programming.

Suppose you have 2 directories on your file system. The goal is to make the target directory exactly the same as the source directory. So if a file or directory exists in source but not in target it needs to be copied to target. If a file or directory exists in target which does not exist in source then it needs to be deleted from target. Additionally, the program needs to be smart enough to copy only those files which have changed instead of copying all the files all the time. The reason for this is simple. Suppose our source directory has 1000 data files each 500MB in size. That is a lot to copy! The first time running this program will take a long time as all the data files are copied. The second time will only take a millisecond since nothing has changed.

Requirements:
* Java

The license of this software is Free, you can free download and free use this file sync software.