SimpleDB is an academic database widely used to teach the internals of database internals to students. By default it provides api's to store only short data types as record types. I modified the existing classes to add support to a broad set of data types including String, Date, Long, Int, Double. Also it uses a primal linear search mechanism to search for a buffer in its buffer pool. I replaced the entire default buffer mechanism by a Hash based approach. It significantly increases the search times for a buffer. Also the database currently does not have any buffer replacement policy in place. I implemented LRU-K buffer replacement policy for this database.