Until December 31, 2024, all AWS customers will be enrolled automatically in the T4g free trial as detailed in the AWS Free Tier. During the free-trial period, customers who run a t4g.small instance will automatically get 750 free hours per month deducted from their bill during each month.
On 17 January 2024, the Government of the Czech Republic approved the material "Restarting the implementation of DNSSEC and IPv6 technologies in the state administration". On the basis of this decision, the Czech state administration will stop providing its services over IPv4 on 6 June 2032. Thus, the Czech Republic knows its IPv4 shutdown date.
The Amazon Elastic Compute Cloud (Amazon EC2) T4g instance Free Trial is extended to December 31, 2024. All new and existing AWS customers can utilize the free trial to automatically deduct up to 750 hours per month with the t4g.small instances through December 31, 2024. You can start building on Graviton-based instances for no charge with the T4g free trial, though charges may apply for surplus CPU credits. Refer to Amazon EC2 FAQs for more details on the free-trial.
Powered by custom fourth generation Intel Xeon Scalable Processors (Sapphire Rapids), the instances are now available in multiple AWS regions in preview form, in the US West (Oregon), Asia Pacific (Seoul), and Europe (Frankfurt) AWS Regions, as follows[.]
一般的 Time Sync Service 服務大多是 ms 等級,也就是 10-3 秒這個等級,μs 則是到了 10-6...
但這其實有點詭異,目前只有 AWS 東京區有這個服務,而且限制在 r7g 的機器上才能用:
Amazon Time Sync with microsecond-accurate time is available starting today in the Asia Pacific (Tokyo) Region on all R7g instances, and we will be expanding support to additional AWS Regions and EC2 Instance types.
也就是說 us-east-1、us-west-2 這些第一線熱門的區域沒有,另外只有特別的 ARM 機種,而且是 memory-intensive 的 r7g 才能用?
Effective mid-2024, newly released Amazon EC2 instance types will use only version 2 of the EC2 Instance Metadata Service (IMDSv2). We are also taking a series of steps to make IMDSv2 the default choice for AWS Management Console Quick Starts and other launch pathways.
On August 15, 2022 we expect all migrations to be complete, with no remaining EC2-Classic resources present in any AWS account.
但後來還是晚了整整一年,到 2023/08/15 (剛好晚了一年) 才全部退役:
On August 15, 2023, we shut down the last instance of Classic.
而公告上面的更新則是在 2023/08/23 更新:
Update (August 23, 2023) – The retirement announced in this blog post is now complete. There are no more EC2 instances running with EC2-Classic networking.
因為真的太久沒用了,看了 Werner Vogels 的描述才能回想起來當時的架構,似乎是有一大鍋這件事情,靠 security group 拆開大家:
When we launched EC2 in 2006, it was one giant network of 10.2.0.0/8. All instances ran on a single, flat network shared with other customers. It exposed a handful of features, like security groups and Public IP addresses that were assigned when an instance was spun up.
Retiring services isn’t something we do at AWS. It’s quite rare. Companies rely on our offerings – their businesses literally live on these services – and it’s something that we take seriously. For example SimpleDB is still around, even though DynamoDB is the “NoSQL” DB of choice for our customers.
用「List of AWS Services Available by Region」這頁查了一下,SimpleDB 的區域意外的還不少,在 us-east-1、us-west-1、us-west-2、ap-southeast-1、ap-southeast-2、ap-northeast-1、eu-west-1 以及 sa-east-1。