Over a number of years, HLN migrated a major public health system for a large municipal health department first from HP-UX to IBM-AIX, and then to Linux, as the agency's hardware standards changed. Along with this migration came several changes to the network infrastructure which required careful cooperation with both the agency's network engineering and operations staff and the municipal IT organization as well. The migration to Linux significantly reduced the cost of ownership for this system and increased system performance several fold.
HLN developed a detailed system architecture for a major Western municipal health department as part of its support for bio-terrorism preparedness. A sophisticated set of options was required to account for a variety of scenarios possible during emergency conditions. Information security and high availability were key objectives met by the recommendations.