Accessing records of a backup file in a network storage

A system for maintaining a backup file in a network storage over a network, comprising:

• processor;
• and
• a computer readable storage medium having computer readable program instructions executed by the processor to perform operations, the operations comprising:
• processing a backup file comprising a sequential file of metadata records and data set records, wherein the metadata records include metadata on data of data sets in the data set records;
• generating backup objects to store the metadata and the data set records in the backup file;
• determining containers in the network storage to store the backup objects offered by at least one storage service;
• generating backup object information indicating, for each backup object of the backup objects, an order of data set records in the backup file, stored in the backup object, and a container name of a container in the network storage offered by one of the at least on storage service to store the backup object;
• determining, from the backup object information for the backup objects, containers for the backup objects;
• and
• concurrently transmitting multiple of the backup objects to the network storage over the network to concurrently write to the containers determined from the backup object information for the backup objects being transmitted.

A method for maintaining a backup file in a network storage over a network, comprising:

• processing a backup file comprising a sequential file of metadata records and data set records, wherein the metadata records include metadata on data of data sets in the data set records;
• generating backup objects to store the metadata and the data set records in the backup file;
• determining containers in the network storage to store the backup objects offered by at least one storage service;
• generating backup object information indicating, for each backup object of the backup objects, an order of the data set records in the backup file, stored in the backup object, and a container name of a container in the network storage offered by one of the at least on storage service to store the backup object is stored;
• determining, from the backup object information for the backup objects, containers for the backup objects;
• and
• concurrently transmitting multiple of the backup objects to the network storage over the network to concurrently write to the containers determined from the backup object information for the backup objects being transmitted.