See map. 214 entrance is on in the little corridor whose entrance is between rooms 210 and 208 on the second floor off the Rideau Canal Atrium. Other rooms in the corridor are 211-213 and 215.
This is the largest room on the second floor, and will be the main room of the MSR (Mining Software Repositories) co-located conference on Monday and Tuesday (MSR also uses 215 right next door).
During the main conference days this will be used for some of the sessions that are expected to attract the biggest audiences, such as the Panel 1 and the Town Hall on Thursday afternoon. At other times a key theme will be AI for Testing and Quality.