In one embodiment, a system includes one or more processors and a memory storing instructions that, when executed by the one or more processors, cause the one or more processors to perform operations including sequencing a plurality of rows into a first sequence based on a first criteria and determining to store a first set of the plurality of rows in a first block of a first storage unit in accordance with the first sequence. The operations further include determining to store, in a first block of the second storage unit, a block identification of the first block of the first storage unit and a row identification for each row of the first set of the plurality of rows. The operations further include re-creating the first set of the plurality of rows of the first block of the first storage unit using information stored in the second storage unit.