1. A concurrent transaction subsystem for a journal as a reliable high-speed front end for disk writes, the concurrent transaction subsystem comprising: a module configured to write at least one data block to a journal, wherein the journal comprises an allocation of persistent storage, and wherein the at least one data block is associated with a location on a memory; wherein the module is further configured to write at least one delta element to the journal, wherein the at least one delta element is associated with at least one data operation that is one of the following: order independent and partially ordered; and wherein the at least one delta element is associated with the location on the memory.