Persistent Data Library (PDL) manages object persistence in C++ applications. PDL abstracts persisting features and provides an easy programming environment to the programmer. It offers a set of data structures which transparently handles persistence. Data structures in PDL are quite similar to data structures in Standard Template Library (STL) in C++ but STL does not provide functionality to make data persistent. This kind of a library will be beneficial when implementing Fault Tolerance to state based applications. State based applications need to checkpoint data periodically. In case of a failure, such applications need fast recovery of data. In developing such applications, each time a new state is introduced to the system, the programmer needs to write code to serialize and de-serialize data. PDL framework helps the programmer to write less code on serialization and de-serialization. Due to the direct memory dumping technology PDL uses, the time taken to write data to the disk and recover data from the storage is minimized.
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