On January 17th, 2015 we will perform scheduled upgrade of our meta-data servers. This will cause a maintenance window from 2:00 pm to 3:00 pm (GMT+1), or 5:00am to 6:00am (PST).
During the maintenance, you can't access your data. All network connections will be terminated by "HTTP 503 - down for maintenance" status message.
All running tasks will be monitored by us and restarted in case of any interruption. Orchestrations and running transformations will be generally delayed, but not interrupted. However, feel free to re-schedule your saturday's orchestrations to avoid this maintenance window.