Object Storage concepts
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Updated at March 19, 2025
Object Storage uses the following concepts:
| Concept | Description |
|---|---|
| Bucket | Object Storage unit allocated for user data. |
| Object | File with data in any format. |
| Bucket versioning | Feature that allows you to store multiple copies of an object in a bucket. |
| Object lock | Feature that protects an object version against deletion or overwrite. |
| Partial object updates | Feature that enables partial updating and appending of objects data. |
| Encryption | Data encryption algorithm. |
| Bucket object lifecycles | Rules for automatically deleting objects and changing their storage class. |
| Pre-signed URLs | Method for granting anonymous users access to storage operations. |
| Multipart upload | Method for uploading large objects. |
| Access control list | Tool for granting access to objects and buckets. |
| Access policy | Tool for managing permissions to perform actions with objects and buckets. |
| Uploading data via an HTML form | Method for uploading objects to a storage from a browser that allows anonymous users to upload objects to buckets. |
| Storage class | Way to reduce the cost of storing objects by dividing them into frequently accessed objects and long-term storage objects. |
| Backups | Process for backing up data stored in Object Storage. |
| Labels | Key-value pairs for logical bucket tagging. |
| Quotas and limits | Service use restrictions. |
See also the Yandex Cloud general resource hierarchy.