An apparatus for controlling devices for searching homology of queries in a base sequence in parallel, includes: a memory for storing a base sequence and an appearing frequency of each of first strings each having a fixed length appearing in the base sequence; and a processor for executing a process including: obtaining queries for searching homology in the base sequence; retrieving each of second strings each having a longer fixed length then that of first strings and partially appearing in each of the queries; determining an approximate appearing frequency of each of the second string on the basis of the appearing frequency of the first strings; evaluating for each of the query sequences a load of task for searching homology; and allocating each task for searching homology for each of the queries among the devices on the basis of the result of evaluation of the load of the each task.
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