Common Questions Overview

CFS

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      • Announcement on CFS Metric Adjustments
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      • How to Choose Between CFS and PFS
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      • Create file system
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      • Add mount target
      • Mount and Unmount CFS on BCC
        • Mount and Unmount on Linux System
          • Mount and Unmount SMB Protocol CFS on Single BCC
          • Batch mounting and unmounting NFS CFS on multiple BCC
          • Mounting and unmounting NFS CFS on a single BCC
        • Mount and Unmount SMB Protocol CFS on Windows System
        • Mount CFS File System When Purchasing New BCC
      • Using CFS in CCE
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      • View monitoring
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    • Cloud Audit
  • Typical Practices
    • Set Different User Permissions for Different Directories
    • Using File Systems Across Regions Or Accounts
    • Use SFTP to Upload and Download CFS File System Data
    • Use Rsync to Sync From Old File System to CFS File System
    • Best Practices for Managing CFS with Terraform
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      • Linux System Performance Testing Methods
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      • Create file system
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      • Query mount client
      • Drop file system
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    • mount target Related Interfaces
      • Create mount target
      • Query mount targets
      • Delete mount target
    • Permission Group-related APIs
      • Create Permission Group
      • Update permission group
      • Query Permission Groups
      • Delete permission group
      • Create permission group rules
      • Update permission group rules
      • Query permission group rules
      • Delete permission group rule
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    • CFS Service Level Agreement (SLA)
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CFS

  • Updates and Announcements
    • Function Release Records
    • Product Announcement
      • Announcement on CFS Metric Adjustments
  • Product Description
    • Product Introduction
    • Basic concepts
    • Product features
    • Product specifications
    • Usage Limits and Recommendations
    • Selection Guide
      • How to Choose Between CFS and PFS
      • How to Choose Between CFS, BOS and CDS
    • Application scenarios
  • Product pricing
    • Pay-as-you-go
    • Storage package billing
    • Insufficient balance reminders and debt handling
    • Billing Cases
  • Quick Start
    • Getting Started Overview
    • Quick start (Linux)
    • Quick start (Windows)
  • Operation guide
    • Activate Service
    • Manage File System
      • Create file system
      • Delete a file system
      • View file system details
      • Set File System Capacity Upper Limit
    • Mount and Access
      • Add mount target
      • Mount and Unmount CFS on BCC
        • Mount and Unmount on Linux System
          • Mount and Unmount SMB Protocol CFS on Single BCC
          • Batch mounting and unmounting NFS CFS on multiple BCC
          • Mounting and unmounting NFS CFS on a single BCC
        • Mount and Unmount SMB Protocol CFS on Windows System
        • Mount CFS File System When Purchasing New BCC
      • Using CFS in CCE
    • Permission Group Management
    • Identity and access management
    • Data encryption
    • Management Tags
    • Backup
    • Monitor and Alarm
      • View monitoring
      • Alarm management
      • Metric definition
    • Cloud Audit
  • Typical Practices
    • Set Different User Permissions for Different Directories
    • Using File Systems Across Regions Or Accounts
    • Use SFTP to Upload and Download CFS File System Data
    • Use Rsync to Sync From Old File System to CFS File System
    • Best Practices for Managing CFS with Terraform
    • Performance Testing Methods
      • Linux System Performance Testing Methods
      • Windows System Performance Testing Methods
  • API Reference
    • API Function Update Records
    • API Overview
    • Interface Overview
    • General Description
    • Service domain
    • Error code
    • File System Related Interfaces
      • Create file system
      • Update file system
      • Query file system
      • Query mount client
      • Drop file system
      • Update file system tags
    • mount target Related Interfaces
      • Create mount target
      • Query mount targets
      • Delete mount target
    • Permission Group-related APIs
      • Create Permission Group
      • Update permission group
      • Query Permission Groups
      • Delete permission group
      • Create permission group rules
      • Update permission group rules
      • Query permission group rules
      • Delete permission group rule
    • Data type
  • Go-SDK
    • Overview
    • Initialization
    • File system
    • Mount target
    • Error handling
  • FAQs
    • Common Questions Overview
    • General Problems
    • Billing Problems
    • NFS protocol questions
    • SMB Protocol Issues
  • Service Level Agreement (SLA)
    • CFS Service Level Agreement (SLA)
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Table of contents on this page
  • General Problems
  • Billing Problems
  • NFS protocol questions

Common Questions Overview

Updated at：2025-11-11

General Problems

  • [What storage classes does CFS support](CFS/FAQs/General Problems.md#CFS - What storage types are supported?)
  • [What protocol types does CFS support](CFS/FAQs/General Problems.md#CFS - What protocol types are supported?)
  • [How many file systems can each user create](CFS/FAQs/General Problems.md#How many file systems can each user create)
  • [How many mount targets can be created per file system](CFS/FAQs/General Problems.md#How many mount targets can be created per file system)
  • [Can mount targets be accessed across availability zones](CFS/FAQs/General Problems.md#Can mount targets be accessed across availability zones)
  • [How to back up CFS data](CFS/FAQs/General Problems.md#How to back up CFS data)
  • [Which regions has CFS been launched in](CFS/FAQs/General Problems.md#CFS - Which regions are open?)
  • [How does CFS ensure data availability and reliability](CFS/FAQs/General Problems.md#CFS - How to Ensure Data Availability and Reliability)
  • [How to choose between Baidu AI Cloud Object Storage (BOS), Cloud Disk Service (CDS), and Cloud File Server (CFS)](CFS/FAQs/General Problems.md#How to choose between Object Storage BOS, Block Storage CDS, and File Storage CFS)
  • [How to query client read/write throughput traffic](CFS/FAQs/General Problems.md#How to query client read/write throughput traffic)

Billing Problems

  • [How is CFS charged](CFS/FAQs/Billing Problems.md#CFS - How is the fee charged?)
  • [How is the actual storage space used for billing of a file system calculated](CFS/FAQs/Billing Problems.md#How is the actual storage space used for billing of a file system calculated)
  • [How is the storage space of a regular file calculated](CFS/FAQs/Billing Problems.md#How is the storage space of a regular file calculated)
  • [Is file sparsity charged](CFS/FAQs/Billing Problems.md#Is file sparsity charged)
  • [Will charges continue to accrue after arrears](CFS/FAQs/Billing Problems.md#Will charges continue to accrue after arrears)
  • [Can purchasing a storage package increase the maximum throughput of a file system](CFS/FAQs/Billing Problems.md#Can purchasing a storage package increase the maximum throughput of a file system)

NFS protocol questions

  • [Supported NFS protocol versions](CFS/FAQs/NFS protocol questions.md#Supported-NFS-protocol-versions)
  • [Why other NFS versions are not supported](CFS/FAQs/NFS protocol questions.md#Why are other versions of NFS not supported?)
  • [Recommended operating system versions](CFS/FAQs/NFS protocol questions.md#Recommended operating system versions)
  • [Unsupported features](CFS/FAQs/NFS protocol questions.md#Unsupported features)
  • How to resolve the “file does not exist” error after creating a file in an NFS protocol file system?
  • How to resolve data writing delay in an NFS protocol file system?
  • [During mounting, “mount: wrong fs type, bad option, bad superblock”](CFS/FAQs/NFS protocol questions.md#An error occurred during mounting - “mount: -wrong-fs-type,-bad-option,-bad-superblock”)
  • [Missing, duplicate, or delayed updates in folder traversal lists](CFS/FAQs/NFS protocol questions.md#Missing, duplicate, or delayed updates in folder traversal lists)
  • [Interference between client requests with the same hostname and Intranet IP](CFS/FAQs/NFS protocol questions.md#Client requests with the same hostname and internal IP address interfere with each other.)
  • [Client fails to connect to the mount target, kernel log shows “nfs: server XXX not responding, still trying”](CFS/FAQs/NFS protocol questions.md#The client cannot connect to the mount point, and the kernel log indicates - "nfs: -server-XXX-not-responding,-still-trying)
  • [Files named like “.nfsXXXX” found in a directory](CFS/FAQs/NFS protocol questions.md#Some files with names similar to "-.nfsXXXX" were found in the directory.)
  • [Low client throughput or QPS](CFS/FAQs/NFS protocol questions.md#Low client-side throughput or QPS)
  • [Data overwriting when multiple clients perform concurrent append writes to the same file](CFS/FAQs/NFS protocol questions.md#Multiple clients concurrently appending to the same file causing data overwrites.)

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