RRD is the Acronym for Round Robin Database. RRD is a system to store and display time-series data (i.e. network bandwidth, machine-room temperature, server load average). It stores the data in a very compact way that will not expand over time, and it presents useful graphs by processing the data to enforce a certain data density. It can be used either via simple wrapper scripts (from shell or Perl) or via frontends that poll network devices and put a friendly user interface on it.
While there is no "official" standalone ASHRAE Excel file available for direct download, professionals typically use the database in conjunction with spreadsheets in two primary ways:
: Both the desktop and mobile versions of the database allow users to generate reports. These reports often include a spreadsheet attachment (CSV or XLS) that can be opened on a desktop for further analysis and integration into larger project documentation.
The DFDB is a comprehensive repository containing loss coefficient tables and pictorial outlines for over 200–250 different round, rectangular, and flat oval duct fittings. It covers: duct functions.
support for both I-P (Imperial) and SI (Metric) systems. Integrating ASHRAE Data into Excel