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Content Delivery Network
Content Delivery Network
- What's New
- Function Overview
- Product Bulletin
- Service Overview
- Billing
- Getting Started
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User Guide
- Domain Name Management
- Custom Domain Name Configuration
- Cache Prefetch and Purge
- Analytics
- Resource Package Management
- Log Management
- Domain Certificate Management
- Diagnosis
- Permissions Management
- Enterprise Projects
- Best Practices
- API Reference
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FAQs
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Functions and Usage
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Functions
- What Service Types Does CDN Support?
- Which Protocols Does CDN Support?
- Does On-Demand Service Acceleration Support HLS and RTMP?
- Can CDN Identify Whether a User Is on a Desktop or Mobile Device?
- Does CDN Support Acceleration for a Single Web Page?
- Does CDN Support Binary File Acceleration?
- Does CDN Support Level-2 Domain Name Acceleration?
- Does CDN Accelerate POST Requests?
- What Origin Types Does CDN Support?
- Does Huawei Cloud CDN Support HTTP/3?
- Does Huawei Cloud CDN Support Content Encryption Before Distribution?
- Does Huawei Cloud CDN Support Intranet Acceleration?
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Usage
- How Do I Grant CDN Permissions to IAM Users?
- How Do I Obtain the IP Address of a User?
- Does CDN Support Acceleration by Region?
- What Is the Conversion Rule for Traffic and Bandwidth?
- Does CDN Accelerate the Origin Server of a Website, or Accelerate the Domain Name?
- Can Wildcards Be Used as Part of an Acceleration Domain Name?
- Is CDN Necessary If My Services Are Deployed Within a City?
- How Does CDN Determine the Region to Which a User Belongs?
- How Do I Direct Traffic from a Third-party Platform to CDN?
- Can an Acceleration Domain Name Be Configured with Multiple Origin Servers?
- Can I Use CDN If the Origin Port Is Not 80?
- How Do I Configure an Origin Server When It Is a Non-Huawei Cloud Object Storage Bucket?
- Does CDN Accelerate User Access from a Specified Line?
- What Are the Differences Between an Acceleration Domain Name and an Origin Domain?
- Can CDN Provide Acceleration for a Domain Name That Houses Different Types of Services (Website, VOD, and File Download)?
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Functions
- Purchase and Billing
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Domain Name Settings
- Does CDN Support the Configuration of Domain Names with Ports?
- Can a Subdomain Name Be Used as an Acceleration Domain Name?
- Can the CNAME of an Acceleration Domain Name Be Directly Accessed?
- Do I Need to Configure a Certificate for the Origin Server After Adding a Security Certificate to CDN?
- How Do I Check Whether the CNAME Record Has Taken Effect?
- Can I Limit Access to Domain Names Based on QPS?
- Does Huawei Cloud CDN Accelerate Content Redirected from VPN?
- Does My Domain Name Have to Be Resolved on Huawei Cloud?
- Why Do My Domain Requests Still Go to CDN PoPs After My Domain Name Has Been Disabled and Domain Resolution Has Been Changed?
- How Do I Configure a Certificate If My Domain Name Is a Wildcard Domain?
- Does CDN Support Modification to Acceleration Service Types?
- Why Am I Seeing the "Incomplete certificate chain" Message?
- Why Am I Seeing a Message Indicating that the Certificate Format Is Incorrect?
- Are Self-Signed HTTPS Certificates Supported?
- Does CDN Support Force HTTPS?
- Can I Use HTTP After HTTPS Is Configured?
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Cache Settings
- Will the Cache on CDN PoPs Be Updated in Real Time?
- Does CDN Cache Status Codes 404 and 403?
- What Are the Default Cache Rules? Can I Modify the Cache Age?
- Does the Path in Cache Settings Refer to a Web Address or File Path on the Server?
- Why Is the CDN Cache Hit Ratio Low?
- How Do I Cache the Homepage (Root Directory)?
- How Do I Check Whether a Cache Is Hit?
- Why Is the Latest Content Inaccessible Even When the Maximum Cache Age Is Set to 0?
- Does Huawei Cloud CDN Support Caching octet-stream Stream Files?
- Why Are Certain Files Not Downloadable Even Though They Have Not Expired (365 Days)?
- How Do I Configure Cache for Resources That Do Not Need to Be Cached?
- How Do I Synchronize Content Cached on CDN PoPs with That on the Origin Server?
- Why Does a Cache Rule Not Take Effect?
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Troubleshooting
- Why Am I Seeing a Message Indicating that the Domain Name Already Exists When I Add a Domain Name for CDN Acceleration?
- Why Is My Domain Name Inaccessible After HTTPS Secure Acceleration Is Configured?
- Why Is Data Obtained from a CDN PoP Not the Updated Data?
- Why Is 304 Returned When a User Accesses a Resource Under My Acceleration Domain Name?
- Why Is the Accelerated Page Incorrect Even Though I Can Access the Origin Server?
- Why Can't a Web Page Be Properly Displayed After the Origin Server's IP Address Is Changed?
- Why Do I Get an Access Failure and Access-Control-Allow-Origin Error?
- Why Does the System Always Display "301" After HTTPS Is Configured for a Domain Name?
- Why Do I Get Request Timed Out When Trying to Ping an Acceleration Domain Name?
- Why Are Incorrect Resources Being Pulled from My Origin Server?
- Why Is My Site Slow the First Time I Access It After CDN Is Configured?
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Cache Purge and Prefetch
- What Are the Differences Between Cache Purge and Cache Prefetch?
- Why Am I Seeing Insufficient Permission for Cache Purge and Prefetch?
- Why Does a Cache Prefetch Operation Fail?
- Does Cache Purge Refresh Content Cached on All PoPs?
- Should I Enter an Origin URL or Domain Name URL for Cache Purge and Prefetch?
- Why Does a Prefetch Task Remain in the Being Processed Status for a Long Time?
- How Do I Purge the CDN Cache Where the Domain Name Includes a Wildcard?
- Why Is the Content Not Updated Even After I Prefetched and Purged the Cache?
- Does CDN Support Directory Prefetch?
- Are Cache Purge and Prefetch Mandatory?
- Do I Need to Purge or Prefetch the Cache of Both HTTP and HTTPS URLs?
- Can I Prefetch M3U8 Files?
- Which Should I Do First, Purge or Prefetch, When I Want to Update Cache?
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Security
- What Security Capabilities Does CDN Provide?
- Can I Configure Referer Validation to Prevent Hotlinking?
- Does CDN Support IP Address Filtering?
- How Does CDN Respond to CC Attacks?
- Does CDN Have Anti-DDoS Capabilities?
- Can Certificates Be Updated Without Service Interruption?
- Does CDN Detect Viruses in an Acceleration File?
- Can Multiple Certificates Be Configured for a Domain Name?
- Statistics and Logs
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Origin Pull
- In What Scenarios Does CDN Pull Content from an Origin Server?
- What Do I Fix Origin Pull Failures?
- How Do I Check Whether Range Requests Are Supported for Origin Pull?
- If a Domain Name Is Attacked, Will Access Requests Be Directed to the Origin Server?
- What Are the Benefits of Configuring a Standby Origin Server?
- Does CDN Support Direct Origin Pull Through Crawler Access?
- What Is the Difference Between a Host and an Origin Server?
- How Is Origin Pull If the Origin Server Has Multiple IP Addresses?
- Why Are Incorrect Resources Being Pulled?
- How Do I View Origin Pull Records?
- Will CDN Download All Files If I Send a Status Code 206 to Request 100-Byte Content?
- Change History
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Functions and Usage
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Troubleshooting
- Why Can't I Access a Web Page or Play a Video After I Enable CDN?
- Why Is It Still Slow to Access a Domain Name That Has Been Added for CDN Acceleration?
- Why Is the Displayed or Downloaded Content Incorrect After CDN Acceleration Is Used?
- Why Is a 4XX Status Code Returned When I Request Resources from My Acceleration Domain Name?
- Why Is a 5XX Status Code Returned When I Request Resources from My Acceleration Domain Name?
- Why Does a 301/302 Redirect Loop Occur When I Request Resources from My Acceleration Domain Name?
- Status Code and Handling Suggestions
- Why Can't I Log In to My Domain Name or Why Is the Information of Other Users Displayed?
- How Do I Check Whether an Access Fault Is Caused by a CDN PoP or Origin Server?
- Why Is the Cache of a Resource Inconsistent on Different PoPs?
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Help Center/
Content Delivery Network/
FAQs/
Cache Purge and Prefetch/
Are Cache Purge and Prefetch Mandatory?
Are Cache Purge and Prefetch Mandatory?
Updated on 2024-04-17 GMT+08:00
This depends on the scenario.
- If a file is updated on an origin server, the file needs to be updated on CDN points of presence (PoPs).
- It is recommended that large files, especially video files, be prefetched to improve user experience.
- Prefetch is not recommended for small files.
Parent topic: Cache Purge and Prefetch
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