Abstract: System and method are disclosed for stream computing. An exemplary method may include receive data from a data processing module and determining whether the received data are effective data that are neither incomplete nor duplicative. The method may also include obtaining the effective data when it is determined that the received data are either incomplete or duplicative. In addition, the method may include storing the effective data in a log file of a file system.

Abstract: A computer-implemented method for providing transportation service is described. The method can include receiving a first transportation service request from a user terminal device. The method can further include determining, by a processor, an estimated time for the first transportation service request to be fulfilled. The method can also include determining, by the processor, a hypothetical time for the first transportation service request to be fulfilled if switching to a carpool request. The method can also include providing, to the user terminal device, a recommendation to switch to the carpool request when the hypothetical time is less than the estimated time. The method can also include providing a carpool service to fulfill the first transportation service request when an acceptance of the recommendation is received from the user terminal device.

Abstract: A distributed data processing method is provided. The distributed data processing method includes: receiving, by a shard node, data uploaded by a client, wherein the data is directed to a table; storing, by the shard node, the data to a storage directory corresponding to the table; and when the storage is successful, sending, by the shard node, the data to each connected stream computing node to perform stream computing.

Abstract: System and method are disclosed for stream computing. An exemplary method may include receive data from a data processing module and determining whether the received data are effective data that are neither incomplete nor duplicative. The method may also include obtaining the effective data when it is determined that the received data are either incomplete or duplicative. In addition, the method may include storing the effective data in a log file of a file system.