point close to an exhaust vent. Distribution of the temperature and humidity across the
entire room is uneven.
Oracle Exadata Racks have been designed to function while mounted in a natural
convection air flow. The following requirements must be followed to meet the
environmental specification:
•
Ensure there is adequate air flow through the server.
•
Ensure the server has front-to-back cooling. The air inlet is at the front of the
server, and the air is let out the rear.
•
Allow a minimum clearance of 1219.2 mm (48 inches) at the front of the server,
and 914 mm (36 inches) at the rear of the server for ventilation.
Use perforated tiles, approximately 400 CFM/tile, in front of the rack for cold air intake.
The tiles can be arranged in any order in front of the rack, as long as cold air from the
tiles can flow into the rack. Inadequate cold air flow could result in a higher inlet
temperature in the servers due to exhaust air recirculation. The following table
describes the recommended number of floor tiles:
Type of Oracle Exadata Database Machine
or Oracle Exadata Storage Expansion Rack
Recommended Number of Floor Tiles
Oracle Exadata full rack systems
4
Oracle Exadata half rack systems
3
Oracle Exadata quarter and eighth rack
systems
1
(page 1-46) shows a typical installation of the floor tiles for Oracle Exadata
Database Machine Full Rack in a typical data center.
Figure 1-6 Typical Data Center Configuration for Perforated Floor Tiles
Chapter 1
Ventilation and Cooling Requirements
1-46
