Data synchronization
is important in the DTN email system. This part of the system is to ensure the
email data can be transferred from the email storage to the infomediary device
and reach the destination storage. Data synchronization operates in the email server
computer on both sides. When the email server computer receives an available
connection of infomediary device, the data synchronization will begin where the
mail server will grab the new data from infomediary device and transfer a new data
from mail server to infomediary device at the same time. There are several options
available for this purpose which is FreeFilesync,
Synchronize It, Beyond Compare 3, rsync
etc. FreeFilesync is a free Open
Source software for Windows and able to compare and synchronize files and
synchronize folders. It supports filters, file sizes greater than 4GB and
creation of batch files for automated synchronization. Synchronize It is a commercial folders comparison and data
synchronize for Windows. It also supports command line switches for unattended
synchronization. Beyond Compare 3 is
the commercial folders comparison and data synchronization for Windows. Rsync is a batch of folders and file
synchronization tools for UNIX systems. Rsync
can copy or display directory contents optionally using compression and
recursion. FreeFilesync is suitable
for this thesis project being it is a free Open Source for Windows and support
for batch file for automated file synchronization.
Infomediary device is
working as a data mule. It carries data storage between data communication
link. It is able to automatically load and unload the data when arrives at its
terminal location. In this thesis, infomediary device requires to establish
network connection at the terminal location which is a mail server and Storage
to store the email data. A laptop, Tablet PC or a Smartphone can be used for
this purpose. An Android Smartphone is used in this thesis project because of
its less power consumption and prolongs battery life. An Android Smartphone is
smaller and easy to move in between terminal location and able to establish a
connection through Wi-Fi. Samba File
Sharing is used to provide network storage for the Terminal Location for
data synchronization.
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