Inodes and disk space are two different practical limits for a hosting account. Disk space measures the size of stored data in gigabytes. Inodes measure the number of individual file system items, such as files and folders. An account can have free disk space and still be unable to create new files if it has reached its inode limit.
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What is the difference between disk space and inodes?
Disk space is the total amount of data that your hosting account can store. Website files, images, databases, email data, logs, backups, and cache data all contribute to the amount of space used. The required capacity depends on the type of website, the amount of content, and how quickly the website grows. Learn more about website disk space requirements.
An inode is a data structure in a Unix-style file system that describes a file-system object. In practical terms, the inode count is the total number of individual items stored on the disk. Files and folders can therefore use inodes even when their total size is small. See how the inode limit counts files and folders.
| Limit | What it measures | Typical reason it grows |
|---|---|---|
| Disk space | The size of stored data | Large media files, databases, backups, or logs |
| Inodes | The number of stored files and folders | Many small cache files, email items, logs, backups, or temporary files |
How can an account run out of usable capacity early?
A website may store thousands of small files. Each file takes up an inode, even if the file uses very little disk space. A cache containing many small files can therefore increase inode usage quickly while adding only a modest number of gigabytes.
The same pattern can occur with email, logs, and backups. Mailboxes may contain many individual messages and attachments. Applications may create repeated log files. Backup systems may keep several copies, with each copy containing many files. These items can increase the inode count as well as the disk-space total.
This creates two different situations. A disk-space limit is reached when the stored data uses the available capacity. An inode limit is reached when the account contains too many individual items. In the second situation, the account can still show free disk space because the remaining capacity is measured in gigabytes, while the restriction concerns the number of files and folders.
How to recognise disk-space exhaustion
Check the disk-space usage shown for the hosting account. If the used amount is close to or at the account quota, large items are the first area to review. Website media, database data, backups, logs, and other stored content can all contribute to the total.
Disk-space exhaustion can affect tasks that need to store more data. New uploads, fresh backups, log entries, and cache data may not be saved when there is no usable space left. This can also affect website features that depend on writing files or updating stored data.
How to recognise inode exhaustion
Review the inode or file-count usage shown for the hosting account separately from disk-space usage. A high inode count with available gigabytes indicates that the number of files and folders is the main constraint.
Common areas to inspect are cache directories, old logs, retained backups, temporary files, and email data. The key sign is a large number of individual items rather than one or two very large files. File creation can fail when the inode limit is reached, so uploads, cache generation, log creation, or backup jobs may stop even though the disk-space meter is not full.
How to reduce disk and inode usage
- Remove stale files. Review old website files, temporary data, unused uploads, and outdated logs. Remove only data that is no longer needed.
- Control cache growth. A cache can improve response times, but a cache with many small files can use a large number of inodes. Clear stale cache data and set a retention period where the application provides that option.
- Adjust backup retention. Keeping fewer outdated backup copies reduces stored data and the number of files belonging to those copies. Keep the backups required for your recovery needs.
- Review email storage. Old messages and attachments can add both disk usage and many individual items. Apply the retention rules used for the mailbox or account.
- Check logs and temporary data. Repeated log files and temporary files can accumulate over time. Remove old items when they are no longer needed.
Why storage technology can also affect performance
Disk capacity and inode count describe limits, while the type of storage describes how stored data is handled. HDD, NVMe, and NVMe are common storage technologies used by hosting services. Storage type can affect website performance, application responsiveness, and database operations. Compare HDD, NVMe, and NVMe hosting storage.
Reducing unnecessary files helps address capacity and file-count pressure. It does not change the storage technology used by the hosting environment. Check both disk-space and inode usage before deciding which cleanup is needed.