The Stub File Filter Driver SDK The Stub File Filter Driver SDK is a powerful kernel-mode SDK designed to simplify the development of cloud storage virtualization, tiered file systems, and on-demand file access solutions. It enables applications to represent remote or archived data as stub files on local disks—providing seamless access to users and applications while maintaining minimal local storage usage.
Using advanced Windows minifilter driver technology, the SDK intercepts and manages file system I/O requests at the kernel level. Developers can transparently control file access, hydration, caching, and synchronization between local stub files and remote data repositories.
- Create placeholder (stub) files that appear as fully accessible files in Windows Explorer.
- A stub file is a small file, typically 1024 bytes in size, used to store metadata locally such as the file size, custom tag data.
- Defer actual content retrieval until users or applications open or read the file.
- Maintain a fully transparent user experience—no modification to applications required.
- Intercept file read operations and automatically download or restore content from the remote source.
- Stream file data to the requesting process in real time.
- Implement custom cache policies to automatically remove rarely used local copies.
- Replace hydrated files with lightweight stubs to reclaim disk space.
- Fully transparent to users and applications.
| Product Name | Description |
|---|---|
| Cloud File System SDK | EaseFilter Cloud File System SDK Introduction. |
| CloudTier Storage Tiering SDK | EaseFilter Storage Tiering Filter Driver SDK Introduction. |
| Stub File Filter Driver SDK | EaseFilter Stub File Filter Driver SDK Introduction. |
| File Monitor SDK | EaseFilter File Monitor Filter Driver SDK Introduction. |
| File Control SDK | EaseFilter File Control Filter Driver SDK Introduction. |
| File Encryption SDK | EaseFilter Transparent File Encryption Filter Driver SDK Introduction. |
| Registry Filter SDK | EaseFilter Registry Filter Driver SDK Introduction. |
| Process Filter SDK | EaseFilter Process Filter Driver SDK Introduction. |
| EaseFilter SDK Programming | EaseFilter Filter Driver SDK Programming. |
| Sample Project | Description |
|---|---|
| CloudTier Storage Tiering Demo | A HSM File System Filter Driver Demo. |
| CloudTier S3 Tiering Demo | CloudTier S3 Intelligent Tiering Demo. |
| Cloud File DR S3 Demo | Cloud File DR S3 Demo. |
| Amazon S3 File Explorer Demo | Amazon S3 File Explorer Demo. |
| Auto File DRM Encryption | Auto file encryption with DRM data embedded. |
| Transparent File Encrypt | Transparent on access file encryption. |
| Secure File Sharing with DRM | Secure encrypted file sharing with digital rights management. |
| File Monitor Example | Monitor file system I/O in real time, tracking file changes. |
| File Protector Example | Prevent sensitive files from being accessed by unauthorized users or processes. |
| FolderLocker Example | Lock file automatically in a FolderLocker. |
| Process Monitor | Monitor the process creation and termination, block unauthorized process running. |
| Registry Monitor | Monitor the Registry activities, block the modification of the Registry keys. |
| Secure Sandbox Example | A secure sandbox example, block the processes accessing the files out of the box. |
| FileSystemWatcher Example | File system watcher, logging the file I/O events. |
| ZeroTrust Example | Zero trust file access control with encryption feature. |
- Understand MiniFilter Driver
- Understand File I/O
- Understand I/O Request Packets(IRPs)
- Filter Driver Developer Guide
- MiniFilter Filter Driver Framework
- Isolation Filter Driver
If you have questions or need help, please contact support@easefilter.com