EXISTING SYSTEM
1. Commercial DBMS venders offer various solutions to data synchronization in a mobile environment.
2. However, these solutions are not independent of the server-side database because they use database
dependentinformation such as metadata or use specific functions of server-side database such as trigger and time
stamp.
3. Because of these restrictions, the extensibility, adaptability and flexibility of mobile business systems
aremarkedly decrease.
EXISTING ALGORITHMS
1. Adaptive Clock synchronization algorithm
2. Event based synchronization algorithm
3. Time synchronization algorithm
4. Low Complexity algorithm
DRAWBACKS OF EXISTING SYSTEM
1. Slower indexing
2. Poor extensibility, adaptability and flexibility
3. Synchronization is very slow
4. Dependent on database vendors
5. Security is less
6. Higher Cost
7. Slow Time consumption.
PROPOSED SYSTEM
1. SAMD resolves synchronization problems using only standard SQL queries. This is followed by a possible
synchronization of any data combination regardless of the kind of server-side database or mobile database.
2. The SAMD makes the images at the table of the server-side database and the mobile database using a
SecuredMessage Digest algorithm; then the images, and the Secured Message Digest values, are saved in the
Secured Message
Digest tables on both sides.
3. The SAMD algorithm compares two images in order to select the rows needed for synchronization.
4. Secured Message Digest is used to detect falsification of data transferred mainly security protocols.
Advantages of SAMD
1. Independence of venders.
2. Synchronization using only standard SQL statements.
3. Disallows schematic modification of data table of the server-side database.
4. Disallows adding restrictions in implementing applications