A real time database system configured to store a database content with a plurality of data sets, the database content being partitioned in different partitions (P1-P5), the system comprising: - a plurality of master databases, each master database containing a partition of the database content, each partition being provided on a different physical storage unit, - at least one replica database, each replica database containing subpartitions of the partitions P1-P5 stored in the master databases, - at least one distributor configured to route a request for a data set to the master database, where the data set to which the request refers to, is provided, and configured to divide each partition (P1-P5) into several subpartitions. - at least one replicator, configured to generate a replica of each subpartition, and configured to store each replica on a replica database, wherein the at least one replicator stores the replicas of each subpartition in such a way that the replicas of the subpartitions of one partition are contained on different physical storage units, on another physical storage unit other than the corresponding partition (P1-P5), and on a physical storage unit other than the replicator generating the replicas of said one partition, wherein the distributor is configured to route a replication request for a subpartition to the replicator responsible for said subpartition, wherein the replica database is a hybrid storage unit containing a working memory area and a disk memory area, wherein the data sets can be faster accessed in the working memory area than in the disk memory area, the disk memory area containing the replicas, wherein the hybrid storage unit is configured to move each replica of a master database for which a failure has been detected and which becomes the master database for the failed master database from the disk memory area to the working memory area of the hybrid storage unit, wherein the at least one replica database is configured to further partition the replica on a replica database into smaller partitions (150, 450), wherein, when the master database restarts after a failure, the replica databases are configured to report the smaller partitions (150, 450) comprising the data sets of the restarted master database needed to recover the partition provided on the restarting master database, to the restarted master database. - a plurality of master databases, each master database containing a partition of the database content, each partition being provided on a different physical storage unit, - at least one replica database, each replica database containing subpartitions of the partitions P1-P5 stored in the master databases, - at least one distributor configured to route a request for a data set to the master database, where the data set to which the request refers to, is provided, and configured to divide each partition (P1-P5) into several subpartitions. - at least one replicator, configured to generate a replica of each subpartition, and configured to store each replica on a replica database, wherein the at least one replicator stores the replicas of each subpartition in such a way that the replicas of the subpartitions of one partition are contained on different physical storage units, on another physical storage unit other than the corresponding partition (P1-P5), and on a physical storage unit other than the replicator generating the replicas of said one partition, wherein the distributor is configured to route a replication request for a subpartition to the replicator responsible for said subpartition, wherein the replica database is a hybrid storage unit containing a working memory area and a disk memory area, wherein the data sets can be faster accessed in the working memory area than in the disk memory area, the disk memory area containing the replicas, wherein the hybrid storage unit is configured to move each replica of a master database for which a failure has been detected and which becomes the master database for the failed master database from the disk memory area to the working memory area of the hybrid storage unit,