Handling asynchronous data provided by at least two sources includes receiving a first portion of the data from a first one of the sources, receiving a second portion of the data from a second one of the sources, where the first and second portions provide the same data, and saving at least one of the portions containing more recent data. The sources may be synchronized with each other to contain the same data. All of the portions may be saved. A portion that contains data that is older than the more recent data may be discarded. Handling asynchronous data provided by at least two sources may also include establishing an active leg for data provided by one of the sources, establishing a passive leg for data provided by an other one of the sources, and saving data provided through the active leg.