WeChat small program cloud development important concepts
May 20, 2021 WeChat Mini Program Development Document
Table of contents
important concepts
Here are some important conceptual explanations for cloud development that are important for understanding cloud development and its development models:
1. Resource environment
An environment corresponds to a set of independent cloud development resources, including databases, storage space, cloud functions and other resources. T he environments are independent of each other, and users create an environment when they start cloud development, with up to two environments by default. I n real-world development, it is recommended that each formal environment be paired with a test environment, and that all functions be tested in the test environment before going to the formal environment. For example, two environments that can be initially created are recommended for one to be created as a test test environment and one as a release formal environment.
For developer debugging, starting with developer tools 1.02.1905302 and the base library 2.7.1, the default environment used in the SDK is output in the debugger after wx.cloud.init:
At the same time, request details for each cloud development operation are output in the Network panel, including the environment ID requested by the call:
2. Quota description
The resource quota
The following are various resource quota metrics for cloud development, with Tencent Cloud TCB providing storage and computing services. U sers can use this feature by downloading the latest WeChat developer tools. Resource quota can be divided into three categories: resource balance type, CDN resource consumption type, cloud function resource consumption type, database resource consumption type.
Resource equilibrium
| Classification | parameter | Basic version 1 | Basic version 2 | Professional version 1 | Professional version 2 | Professional version 3 | Ultimate 1 | Ultimate 2 | Ultimate 3 | Enterprise version 1 |
|---|---|---|---|---|---|---|---|---|---|---|
| storage | capacity | 5GB | 10GB | 50GB | 100GB | 300GB | 500GB | 700GB | 1000GB | 1300GB |
| Download operation | 1.5 million / month | 2 million / month | 7.5 million / month | 15 million / month | 25 million / month | 37.5 million / month | 45 million / month | 50 million / month | 60 million / month | |
| Upload number | 600,000 / month | 1 million / month | 3 million / month | 6 million / month | 10 million / month | 15 million / month | 20 million / month | 25 million / month | 30 million / month | |
| CDN backward traffic 1 | 5GB / month | 10GB / month | 50GB / month | 150GB / month | 300GB / month | 500GB / month | 600GB / month | 800GB / month | 1000GB / month | |
| CDN | CDN traffic | 5GB / month | 25GB / month | 50GB / month | 150GB / month | 300GB / month | 500GB / month | 1000GB / month | 2000GB / month | 4000GB / month |
| Cloud function | Resource usage GBS 3 | 40,000 / month | 200,000 / month | 400,000 / month | 1.5 million / month | 3 million / month | 4 million / month | 15 million / month | 30 million / month | 40 million / month |
| External network traffic | 1GB / month | 3GB / month | 5GB / month | 10GB / month | 20GB / month | 25GB / month | 100GB / month | 200GB / month | 400GB / month | |
| database | capacity | 2GB | 3GB | 5GB | 10GB | 20GB | 10GB | 50GB | 100GB | 200GB |
| At the same time 4 | 20 | 50 | 100 | 200 | 300 | 400 | 500 | 500 | 500 | |
| Read operating | 50,000 / day | 250,000 / day | 500,000 / day | 1.5 million / day | 3 million / day | 5 million / day | 10 million / day | 20 million / day | 50 million / day | |
| Write an operand | 30,000 / day | 150,000 / day | 300,000 / day | 1 million / day | 2 million / day | 3 million / day | 5 million / day | 10 million / day | 30 million / day | |
| Collection restriction | 100 | 150 | 200 | 300 | 400 | 400 | 500 | 600 | 800 | |
| Total price | free | 30 yuan / month | 104 yuan / month | 390 yuan / month | 690 yuan / month | 860 yuan / month | 2,499 yuan / month | 4,699 yuan / month | 8,999 yuan / month |
CDN resource consumption
| Classification | parameter | CDN version 1 | CDN version 2 | CDN version 3 |
|---|---|---|---|---|
| storage | capacity | 50GB | 100GB | 500GB |
| Download operation | 7.5 million / month | 15 million / month | 37.5 million / month | |
| Upload number | 3 million / month | 6 million / month | 15 million / month | |
| CDN backward traffic | 50GB / month | 150GB / month | 500GB / month | |
| CDN | CDN traffic | 500GB / month | 3072GB / month | 10240GB / month |
| Cloud function | Resource usage GBS | 200,000 / month | 500,000 / month | 1.5 million / month |
| Out-of-network traffic | 3GB/month | 5GB/month | 10GB/month | |
| Database | Capacity | 3GB | 5GB | 10GB |
| The number of connections at the same time | 50 | 100 | 200 | |
| Read the number of operations | 250,000/day | 500,000/day | 1.5 million/day | |
| The number of write operations | 150,000/day | 300,000/day | 1 million/day | |
| Collection restrictions | 150 | 200 | 300 | |
| Price | 149 yuan/month | 690 yuan/month | 2,199 yuan/month |
Cloud function resource consumption type
| Classification | Parameters | Cloud Function Version 1 | Cloud Function Version 2 | Cloud Function Version 3 |
|---|---|---|---|---|
| Store | Capacity | 5GB | 10GB | 50GB |
| Number of downloads | 1.5 million/month | 2 million/month | 7.5 million/month | |
| Number of uploads | 600,000/month | 1 million/month | 3 million/month | |
| CDN back-source traffic | 5GB/month | 10GB/month | 50GB/month | |
| Cdn | CDN traffic | 5GB/month | 25GB/month | 150GB/month |
| Cloud function | Resource usage GBs | 400,000/month | 4 million/month | 15 million/month |
| Out-of-network traffic | 5GB/month | 25GB/month | 100GB/month | |
| Database | Capacity | 3GB | 10GB | 20GB |
| The number of connections at the same time | 50 | 200 | 300 | |
| Read the number of operations | 250,000/day | 1.5 million/day | 3 million/day | |
| The number of write operations | 150,000/day | 1 million/day | 2 million/day | |
| Collection restrictions | 150 | 300 | 400 | |
| Price | 79 yuan/month | 390 yuan/month | 1,299 yuan/month |
Database resource consumption
| Classification | Parameters | Database Version 1 | Database Version 2 | Database Version 3 |
|---|---|---|---|---|
| Store | Capacity | 5GB | 10GB | 50GB |
| Number of downloads | 1.5 million/month | 2 million/month | 7.5 million/month | |
| Number of uploads | 600,000/month | 1 million/month | 3 million/month | |
| CDN back-source traffic | 5GB/month | 10GB/month | 50GB/month | |
| Cdn | CDN traffic | 5GB/month | 25GB/month | 50GB/month |
| Cloud function | Resource usage GBs | 200,000/month | 1.5 million/month | 4 million/month |
| Out-of-network traffic | 3GB/month | 10GB/month | 25GB/month | |
| Database | Capacity | 5GB | 50GB | 200GB |
| The number of connections at the same time | 100 | 400 | 500 | |
| Read the number of operations | 500,000/day | 5 million/day | 50 million/day | |
| The number of write operations | 300,000/day | 3 million/day | 30 million/day | |
| Collection restrictions | 200 | 400 | 800 | |
| Price | 69 yuan/month | 590 yuan/month | 1,799 yuan/month |
In addition to the above quota parameters, the small program cloud development resources include the following system parameter limits (all version quotas follow the same system parameter limits):
- Cloud function (single run) running memory: 256M5
- Number of cloud functions: 50
- Cloud functions: 10006
- Database traffic: 16M for a single outing
- Database single-collection index limit: 20
- Small terminal request frequency limit for a single small program: 1 million times per minute
Note:
- CDN back-source traffic: The amount of traffic generated when the CDN back-source storage is turned on after CDN acceleration is turned on.
- Number of cloud function calls: The limit on the number of calls has been released, and now all packages are changed to unlimited calls
- Cloud function resource usage GBs: Resource usage - Function configuration memory X runs for a long time. U ser resource usage is calculated by configuring memory by a function, multiplied by the billing time of the function runtime, whereby the configured memory is converted to GB units and the billing time is converted from milliseconds (ms) to seconds (s), so resource usage is calculated in GBs (GB-seconds). F or example, a function configured for 256MB, with a single run of 1760 ms and a billing time of 1800 ms, uses (256/1024) of resources for a single run of (1800/1000) and 0.45 GBs. For each run of the function, resource usage is calculated and summarized on a monthly basis as resource usage for the month.
- Number of database simultaneous connections: The number of database requests that are connected at the same time, if there are thirty database operation requests at the same time, twenty will be executed simultaneously, leaving ten returns that exceed the number of simultaneous errors, one database request (whether initiated by a small terminal or a cloud function) will consume one connection, and each cloud environment will have a simultaneous connection limit and a separate count. If a database query takes an average of 10ms, a connection can support 100qps (1000ms/10ms x 100), and 20 connections can support up to 2000qps.
- Cloud function (single run) running memory: The maximum available memory at the time of the cloud function run is 256 MB. T he run memory information presented in the cloud function run log is the actual memory used at the time of the run. Actual memory usage may be lower than the maximum available memory and is calculated at 256 MB of configured memory.
- Cloud function simultaneous connections: The simultaneous connection limit has been released and all plans are now changed to a unified maximum of 1000
Service level agreement
Small Program Cloud Development provides storage and computing services by Tencent Cloud TCB, so Small Program Cloud Development follows the relevant provisions of the Tencent Cloud Development Service Level Agreement (SLA).
For customers who have purchased a cloud development plan and have in charged, if service availability is below standard, the developer has the right to claim compensation through the ticket for the corresponding account, in accordance with the compensation scheme in the service level agreement. Specific availability calculation rules, compensation standards and application methods are in accordance with the provisions of the Tencent Cloud Development Service Level Agreement (SLA).
Special instructions
- From the time the paid function is online, the small program and cloud development quota adjustment application through the mailbox application will no longer be accepted.
- The deadline for applying for adjustment of quotas by 2019-06-21 has been extended uniformly to 2019-08-31.