Amazon Time Sync Service expands Microsecond-Accurate time to 87 additonal EC2 instance types
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The Amazon Time Sync Service now supports clock synchronization within microseconds of UTC on 87 additional Amazon Elastic Compute Cloud (Amazon EC2) instance types in supported regions, including all C7i, M7i, R7i, C7a, M7a, R7a, and M7g instances.
Built on Amazon's proven network infrastructure and the [AWS Nitro System](https://aws.amazon.com/ec2/nitro/), customers can now access local, GPS-disciplined reference clocks on additional EC2 instance types. These clocks can be used to more easily order application events, measure 1-way network latency, increase distributed application transaction speed, and incorporate in-region and cross-region scalability features while also simultaneously simplifying technical designs. Additionally, you can audit your clock accuracy from your instance to monitor the expected microsecond-range accuracy. Customers already using the Amazon Time Sync Service on these newly supported instance types will see improved clock accuracy automatically, without needing to adjust their AMI or NTP client settings. Customers can also use standard PTP clients and configure a PTP Hardware Clock (PHC) to get the best accuracy possible. Both NTP and PTP can be used without needing any updates to VPC configurations.
Amazon Time Sync with microsecond-accurate time is available in US East (N. Virginia) and the Asia Pacific (Tokyo) regions on all R7g as well as C7i, M7i, R7i, C7a, M7a, R7a, and M7g instance types. We will be expanding support to additional AWS Regions and EC2 instance types. There is no additional charge for using this service.
Instructions to configure, and more information on the Amazon Time Sync Service, are available for [Linux](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/set-time.html) and [Windows](https://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/set-time.html).
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