Method and system for data handling

An apparatus comprising at least one memory and at least one processor, the at least one memory storing computer executable instructions which, when run by the at least one processor, cause the apparatus to:

• store in the at least one memory, a look-up table comprising respective location values of a plurality of data collections stored in said computer implemented database, wherein a respective location value indicates a respective first location within the computer implemented database where an associated data collection is stored, wherein when access to a respective data collection is required, a look up request is performed with respect to the look up table for the respective location value for said respective data collection;
• providing at least a part of the look-up table to a first cache;
• store, in the look-up table, an indicator for each of said data collections being migrated in response to initiation of a respective data migration process of one or more of said data collections from a respective first database location to a respective second database location, wherein the indicator indicates the initiation of the data migration process for a respective data collection;
• causing information associated with the data collections being migrated to be removed from the at least a part of the look-up table in the first cache;
• and
• at an end of a data migration process for a given data collection, determining if the location value of the given data collection in the look-up table which is stored in the at least one memory in said at least one server is to be updated to the second database.

A computer program product comprising computer executable instructions which, when run by at least one processor, cause an apparatus to:

• store in at least one memory, a look-up table comprising respective location values of a plurality of data collections stored in said computer implemented database, wherein a respective location value indicates a respective first location within the computer implemented database where an associated data collection is stored, wherein when access to a respective data collection is required, a look up request is performed with respect to the look up table for the respective location value for said respective data collection;
• provide at least a part of the look-up table to a first cache;
• store, in the look-up table, an indicator for each of said data collections being migrated in response to initiation of a respective data migration process of one or more of said data collections from a respective first database location to a respective second database location, wherein the indicator indicates the initiation of the data migration process for a respective data collection;
• cause information associated with the data collections being migrated to be removed from the at least a part of the look-up table in the first cache;
• and
• at an end of a data migration process for a given data collection, determine if the location value of the given data collection in the look-up table which is stored in the at least one memory in said at least one server is to be updated to the second database.