bulgaria-sofia: information systems and servers./ "upgrading of an existing data center in bim in the main building on dr. g.m. blvd. dimitrov no. 52 b and construction of a spare one in the bim building at prof. petar mutafchiev st. no. 2"./ the subject is "upgrading an existing bim data center in the main building on dr. g.m. blvd. dimitrov no. 52 b and construction of a spare one in the bim building at prof. petar mutafchiev st. no. 2". the scope of the order includes activities of equipment delivery, construction of server infrastructure, virtualization, construction of system redundancy, backup and recovery policies, prevention of data loss in various scenarios of failure of certain components and accidents, migration of the current server infrastructure to the new platform, commissioning, redundancy testing, training of the employer's personnel and warranty support of the systems.