1. A method for computing a first database hash sum for a first database having a first parallel system architecture comprising a plurality of nodes, the method comprising: generating, by a master node, processing instructions for calculation of a set of node hash sums for each individual node of the plurality of nodes using parallel processing by the individual nodes; causing, by the master node, calculation of the set of node hash sums by each individual node based on the processing instructions, wherein calculating a node hash sum for an individual node comprises: calculating, by a processor of the individual node, a set of hash values for each individual record of a plurality of records stored at the individual node, wherein calculating a hash value for an individual record comprises: retrieving the individual record; preprocessing one or more fields of the individual record to generate a record value, wherein preprocessing the one or more fields of the individual record is based on one or more first preprocessing rules corresponding to the first parallel system architecture; and calculating the hash value for the individual record based on the record value; and combining each hash value of the set of hash values to generate the node hash sum for the individual node by: converting each hash value of the set of hash values to a corresponding numeric representation; and summing each converted hash value using an arithmetic summation function to generate the node hash sum for the individual node; combining each node hash sum of the set of node hash sums to generate the first database hash sum by: converting each node hash sum of the set of node hash sums to a corresponding numeric representation; and summing each converted node hash sum using the arithmetic summation function to generate the first database hash sum; comparing the first database hash sum with a second database hash sum, wherein the second database hash sum is associated with a second database having a second parallel system architecture different from the first parallel system architecture of the first database and is calculated using second preprocessing rules corresponding to the second parallel system architecture; and determining whether content of the first database is equivalent to content of the second database based on a result of the comparison.