Current status: All our ducks are in a row.

What is this site? We monitor the status of coursera.org and our class sites, and we update here whenever there are interruptions in service.

Sunday, August 25, 2013

2013-08-25: [Update] Period of increased latency

We have shifted traffic to avoid the AWS datacenter that is currently experiencing issues, and are serving at full capacity from Amazon's other datacenters. Site latency and error rates seem to be normal at this point.

2013-08-25: Period of increased latency

Beginning around 12:50 PDT, we observe increased site latency and error rates. Investigations are ongoing, although it looks like we might have been affected by degraded EBS performance (the disks backing our servers) reported by Amazon. The issue looks resolved now, but we will continue to monitor for further problems.