When we buy Alibaba Cloud servers, cloud servers with the same configuration often have multiple instance specifications to choose from, and the ** of different instance specifications is very different, for example, a cloud server with 2-core 4G configuration, in the current activities of Alibaba Cloud, there are economic E, general computing power U1, computing C7, computing C8Y and other instances to choose from, **In terms of aspect, the activities of the 2-core 4G1M configuration of economic E instances are currently only 59993 yuan for 1 year, while the compute C7 instance costs 186000 yuan 1 year. It can be seen that there is still a big difference between different instance specifications, so what is the Alibaba Cloud server instance specification?As a first-time buyer of Alibaba Cloud servers, how should you choose between many instance types?
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First of all, let's talk about why is it important to select an instance type
1. Maximize the use of cloud server resources.
Whether it is an individual or an enterprise, when purchasing Alibaba Cloud servers, we should not only consider the size of the cloud server configuration according to the business, but also select the corresponding cloud server specifications according to the business application scenarios, so as to maximize the performance of the cloud server, ensure the stable operation of the business, and not waste cloud server resources. Economy-based E instances are fine, but if we need ECSs to process a large amount of data and require the ECS CPU to have ultra-stable computing capabilities, we must at least choose compute-optimized instances.
2. Try to save our costs on cloud servers.
For example, we are a project running on an enterprise official website or app, usually speaking, you can choose a compute-type C7 or general-purpose computing power type U1 instance, if you choose a relatively lower economical E instance, it may not be able to meet the needs of the stable operation of the project, and choosing a higher performance instance type will increase the cost.
Second, let's learn what are the instance specifications of cloud servers
An instance is the smallest unit that can provide computing services for your business, and different instance types can provide different computing capabilities. Instance types define the basic attributes of an ECS instance in terms of computing performance, storage performance, and network performance, but it is necessary to work with the mirror, block storage, and network configurations to determine the specific service form of an ECS instance.
ECS instances can be classified into multiple instance families based on business scenarios and usage scenarios. Based on configurations such as CPU and memory, an instance type family is divided into multiple instance types. ECS instance types define the basic attributes of the instance: CPU and memory, including CPU model and frequency. However, an ECS instance can only determine the specific service form of an instance if it is used in conjunction with block storage, mirroring, and network types.
Enterprise scenarios require high business stability. Instance families can be divided into enterprise-level instance families and shared instance families. Shared ECSs use the non-bound CPU scheduling mode. Each vCPU will be randomly allocated to any idle CPU hyperthread, and different instance VCPUs will compete for physical CPU resources, resulting in unstable computing performance fluctuations during high loads. Enterprise-level instances use the fixed CPU scheduling mode. Each vCPU is bound to a physical CPU hyperthread, so there is no contention for CPU resources between instances, and the computing performance of the instances is stable and has strict SLA guarantees. In enterprise-level instances, each vCPU corresponds to a processor core hyper-threading based on the x86 instance type, and each vCPU corresponds to a processor's physical core based on the ARM architecture instance type, which has the characteristics of stable performance and exclusive resource sharing.
Finally, how should we choose an instance type?
For most users, the purchase of Alibaba Cloud servers is usually through the ECS page and through activities, the custom purchase method can purchase all instance types of ECSs, and the purchase through activities can only purchase the specified ECS instance specifications and configurations, but you can enjoy the activities**.
1. Suggestions for individual user selection.
If you are an individual user, because the budget is generally lower than that of enterprise users, and relatively speaking, the computing performance and stability requirements of the cloud server are lower, if you just want to build quickly, you can consider a lightweight application server, if you want to install the running environment or deploy the project by yourself, it is recommended to choose an economical E instance, if you want to use an exclusive cloud server, it is recommended to give priority to the general computing power U1 instance.
2. Suggestions for ordinary enterprise users.
Compared with individual users, enterprise users have higher requirements for cloud server performance, network sending and receiving capabilities, stability and other aspects, and have more budgets than individual users. For ordinary enterprise users, we recommend that you choose a general-purpose computing power U1 instance or a 7th generation instance, both of which are enterprise-level dedicated instances that use a fixed CPU scheduling mode. Each vCPU is bound to a physical CPU hyperthread, so there is no contention for CPU resources between instances, and the computing performance of the instances is stable and has strict SLA guarantees.
3. Suggestions for large-scale enterprise-level users.
If you are a large-scale enterprise-level user and have higher requirements for the computing, storage, and network performance of the cloud server, it is recommended to choose the 7th or 8th generation cloud server, the 7th generation cloud server, and the 3rd generation Xeon Scalable processor (codename)."icelake"and Alibaba Cloud's self-developed third-generation Shenlong cloud server architecture, which is equipped with ESSD cloud disk as standard, and the computing power of the whole machine is 26 times, the network and storage IO performance is greatly improved. The eighth-generation cloud server, equipped with AMD EPYC processor, has excellent performance, high performance ratio, and is safe and reliable. If you choose Yitian Cloud Server to improve computing, storage, and network performance by orders of magnitude, such as cloud native, high-performance computing, CPU-based machine learning, and game services, it is recommended to give preference to Yitian Cloud Server.