Abstract: A input/output method is disclosed for performing communications in a virtual machine (VM) environment between a host operating system (OS) and a guest OS. The input/output method includes performing request polling (RP) on an input/output event generated by a guest OS which is driven by a virtual machine (VM), sending an input/output request to a host OS, on which the VM runs. The input/output method further includes performing response waiting polling (RWP) on an input/output completion message generated by the host OS when the input/output event is detected through the RP, and sending an input/output response to the guest OS when the input/output completion message is detected through the RWP. In the method, the RP and the RWP are performed by multiple threads executed on the VM.

Abstract: A input/output method is disclosed for performing communications in a virtual machine (VM) environment between a host operating system (OS) and a guest OS. The input/output method includes performing request polling (RP) on an input/output event generated by a guest OS which is driven by a virtual machine (VM), sending an input/output request to a host OS, on which the VM runs. The input/output method further includes performing response waiting polling (RWP) on an input/output completion message generated by the host OS when the input/output event is detected through the RP, and sending an input/output response to the guest OS when the input/output completion message is detected through the RWP. In the method, the RP and the RWP are performed by multiple threads executed on the VM.

Abstract: A data synchronization system is provided. In the data synchronization system, a synchronization message transmitting party transmits a synchronization message with meta information to a synchronization message receiving party, and the synchronization message receiving party interprets and stores the meta information included in the synchronization message, and performs further processing for data that is to be synchronized, according to the meta information. Therefore, the frequency of wireless connections for synchronization is minimized.

Abstract: A data synchronization system is provided. In the data synchronization system, a synchronization message transmitting party transmits a synchronization message with meta information to a synchronization message receiving party, and the synchronization message receiving party interprets and stores the meta information included in the synchronization message, and performs further processing for data that is to be synchronized, according to the meta information. Therefore, the frequency of wireless connections for synchronization is minimized.

Abstract: Provided is a method of storing data in a non-volatile memory, including generating and storing logs including data to be stored and an address of the non-volatile memory in response to a data-writing request, and comparing addresses of the logs and storing data corresponding to the same page by the unit of page in a corresponding area of the non-volatile memory. The method makes it possible to minimize delay in storing data, reduce the number of accesses to the non-volatile memory and uniformly write data in the whole non-volatile memory, thereby minimizing a response time of the non-volatile memory and increasing the lifetime of the non-volatile memory.

Abstract: Provided is a method of storing data in a non-volatile memory, including generating and storing logs including data to be stored and an address of the non-volatile memory in response to a data-writing request, and comparing addresses of the logs and storing data corresponding to the same page by the unit of page in a corresponding area of the non-volatile memory. The method makes it possible to minimize delay in storing data, reduce the number of accesses to the non-volatile memory and uniformly write data in the whole non-volatile memory, thereby minimizing a response time of the non-volatile memory and increasing the lifetime of the non-volatile memory.