Abstract: With more and more users using ECS service of Ali Cloud, how to keep ECS with the lowest cost has become an increasingly important concern of users. To better serve customers, the ECS team adjusted the minimum capacity limit for system disks.


As more and more users use ECS service of Aliyun, how to keep ECS with the lowest cost has become an increasingly important concern of users.


Change point


To better serve customers, the ECS team adjusted the minimum capacity limit for system disks
  1. Linux system
  1. The core OS starts at 30 GB
  2. The capacity of other Linux systems starts at 20 GB
  1. The FreeBSD system starts with 20 GB
  2. Windows still starts at 40 GIGABytes


Applicable scenario


  1. Currently, the new system disk limit applies only to newly purchased ECS instances. Instances with existing system disks larger than 20 GB cannot be allocated to the new minimum capacity.
  2. Applicable to users who do not have strong requirements on the system disk size
The current elastic scaling configuration also supports the new system disk restrictions. If you need to configure the new scaling configuration on the elastic scaling console, go to the elastic scaling console


Save money contrast


To control variables, always use the following configuration to view prices


  1. When you buy ECS with annual and monthly package:
regional The instance specification The mirror purchases
South China 1 ecs.g5.large CentOS 7.4 64 On January 1


The system disk is 40GB and the price is 314 RMB
The system disk is 20GB and costs 307 RMB


When you buy ECS with a monthly package, you can choose a smaller 20 GB system disk than before
7 RMB/month (not considering the impact of other offers)
  1. When choosing to purchase ECS by volume with the same configuration:


The system disk is 40GB and the price is 1.06 RMB/ hour


The system disk is 20GB and the price is 1.05 RMB/ hour


When choosing ECS by volume, you can choose a smaller 20 GB system disk instead of 40 GB system disk


0.01 * 24 * 30 = 7.2 RMB/month (not considering the impact of other discounts)


To sum up, by adjusting the minimum capacity of the system disk, you can save 7*12=84 RMB/disk per year
When the number of ECS is 1000, the average annual saving is about 8W + RMB. Of course, the more ECS are used, the greater the saving will be.


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