# OCI Object Storage ## Object Storage Object Storage features: * Storage consistency = always serve the most recent copy of the data. * Highly Durable = Data is stored redundantly acrross multiple ADs. Data integrity is monitored and auto-repaired * Object size can be up to 10 TB * Data is stored as objects. * Encryption: Data is encrypted at rest and while in transit. * Regional service, not tied to a specific compute instance. * Offers 2 different storage clases (Tiers): * Hot Storage - for frequently accessed objects * Cold Storage - for less frequent access (archive) * private access from OCI infrastructure using the Service Gateway * cross-regional copy, pre-authenticated requests, lifecycle rules, multi-part upload. ### Resources Object = All data is managed as objects. Each object is composed of the object itself and metadata of the object Bucket = A logical container for storing objects. Each object is stored in a bucket. Namespace = Top level container for all buckets and objects. Each tenancy is provided a unique namespace that is global, spanning compartments and regions. Since the namespace is unique, buckets names must be unique within a tenancy. In a namespace, the hierarchy is flat but you can simulate a directory structure using prefixes. ### Object Storage Tiers #### Standard Storage Tier (Hot) * Fast, immediate and frequent access * ObjectStorage Service always serves the most recent copy * Data retrieval is instantaneous * Standard buckets can't be downgraded to archive storage. #### Archive Storage Tier (Cold) * For rarely accessed data * Minimum retention requirement: 90 days * Objects need to be restored before downloaded. Time to 1st byte after restore request: 4 Hours * Archives can't be upgraded to Standard Storage. ### Hierarchy URL format: `https://objectstorage..oraclecloud.com/n//b//o/[/]` * To simulate a hierarchy you can optionally add PREFIX valuues.PREFIX can also include '/' character but PREFIX1/PREFIX2 is not included in PREFIX1. * You can run operations (delete, download) at the prefix level. ### Cross-regional Copy * Allows you to copy objects to other buckets in the region or to the buckets in other regions. * IAM authorization for the service is needed: `Allow Service ObjectStorage-us-ashburn-1 to manage object-family in tenancy` * You must specify an existing target bucket * Bulk copying is not supported * Objects can't be copied from Archive Storage ### Lifecycle Management * Define rules to auto archive/melete objects after a number of days * ObjectService in your region must have IAM authorization to manage object-family * If applied at bucket or prefix level, it applies to all objects. * Delete rules always takes precedence over an archive rule. ### Access Management #### Pre-authenticated requests * Creates unique URLs for buckets or objects. * Links can be revoked at any time. #### Public buckets * Allow anonymous access to objects in the bucket. ### Multi-part Uploads * A big file can be split into multiple parts in order to make use of parallel uploads and reduce the total upload time. * You can have up to 10000 parts and the size of one part can range from 10MB to 50GB. * The upload can only be initiated via a REST API call. * The upload must be commited when done. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://cloud.nyquist.eu/oci/oci-storage/oci-object-storage.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.