METHOD FOR ENHANCING THE GENERATION OF A BACKUP COPY OF DATA ITEMS OF A DISTRIBUTED DATA STRUCTURE, COMPUTER NETWORK FOR ENHANCING THE GENERATION OF A BACKUP COPY OF DATA ITEMS OF A DISTRIBUTED DATA STRUCTURE, PROGRAM AND COMPUTER PROGRAM PRODUCT

The present invention relates to a method for enhancing the generation of a backup copy of data items of a distributed data structure, wherein the data items are stored on a number of network nodes of a computer network, wherein the number of network nodes include a first and a second network node, wherein the data items include a data item and a further data item, wherein the data item and the further data item are interrelated, wherein the data item is stored on the first network node, wherein the further data item is stored on the second network node, wherein the method comprises the steps of: -- performing, by the computer network, a first transaction step, wherein the data item of the first network node is updated such that a first data item is generated, wherein the further data item of the second network node is updated such that a further first data item is generated, wherein a first transaction identifier is stored on the first and second network node, wherein the first transaction identifier is related to an identification of the first transaction step, -- performing, by the computer network, a second transaction step, wherein the further first data item of the second network node is updated such that a further second data item is generated, wherein a second transaction identifier is stored on the second network node, wherein the second transaction identifier is related to an identification of the second transaction step, -- performing, by the computer network, a backup step, wherein a backup copy of the first data item is generated on the first network node, wherein a further backup copy of the further second data item is generated on the second network node, -- performing, by the computer network, a consistency step such that data consistency is realized between the backup copy and the further backup copy in dependence of the first and second transaction identifier.