Scheduling requests from data sources for efficient data decoding

A storage manager may be used to schedule requests for a data object stored in data sources of a storage system, such as an object-redundant storage system. The storage manager may iteratively request sets of corresponding blocks of the data object from storage devices of the storage system. As the corresponding blocks are received, the storage manager may store the corresponding blocks in an input buffer. In response to receiving at least a particular number of corresponding blocks, the storage manager may remove the corresponding blocks from the input buffer and decode the corresponding blocks into a block of the data object. In response to free space in the input buffer reaching a threshold amount, the storage manager may request subsequent sets of corresponding blocks of the data object such that at least some corresponding blocks are stored in the input buffer when the threshold amount is reached.