Backup of documents in goverment information systems

The thesis is focused on backup documents in the public administration information systems. First chapters of thesis are devoted to general theories of backup files and databases. Next is described storage media what is used for backups, their advantages and disadvantages. Afterwards are described the most common backup strategies and rotation scheme. Thesis is devoted after that to analysis of a representative information system that is used to publish documents to the public. Based on information obtained from analysis is selected optimal backup strategy and this strategy is implemented and tested in designed application