When Amazon applied patches to their EC2 infrastructure to secure it against the Meltdown vulnerability in their Intel processors on December 2017 we experienced a large performance degradation of our feed access point in AWS EC2 Ireland.
Unfortunately it turns out that network heavy distribution applications such as our feed access point is the type of application that are the most affected by the Meltdown mitigations, experiencing up to 50% performance degradation.
To mitigate this we have upgraded our feed access point in AWS EC2 to the instance type that have the highest performance available. Unfortunately upgrading to this instance type means that the old IP address cannot be retained (unfortunately the IP address of the old access point was not an Elastic address, but the new one is) and thus all users of the aws.millistream.com access point must open for port 9000/9100 (depending on if receiving delayed and/or realtime data) to IPv4 address 188.8.131.52.
The CNAME in our DNS servers for aws.millistream.com will change from the current value of 184.108.40.206 to 220.127.116.11 at 2018-02-03.
Valid feed access points for the Millistream Data Feed (MDF):
Address Provider Location sth2.millistream.com IP-Only Stockholm, Sweden sth.millistream.com Verizon Stockholm, Sweden lon.millistream.com C4L London, UK aws.millistream.com Amazon EC2 Dublin, Ireland