amazon s3 file upload api composite catalogue

Amazon S3 File Upload Api Composite Catalogue Full Final Object

Think of the AWS object versioning as a stack of versions ordered by time: Each object has a master version that always points to the most recent entry in the stack Any operation that doesnt specify a version works on that master version This includes delete operations, ie deleting an object without specifying a version creates a DELETE MARKER Its possible to get or delete a specific version by using a version ID GCP behaves differently, for each object, it maintains a MASTER version and an ARCHIVE version: Deleting an object without specifying a version id moves it from master to archive and does not create a DELETE MARKER Deleting a master object by using its version ID permanently destroys its data and does not move it to the archive Theres no concept of a stack so even if an archive version of an object exists, deleting the master version does not promote the archive to master.

Zenko abstracts all major clouds under a single namespace and a single API, namely the AWS S3 API and this removes all the headaches of support multiple APIs from the get go.

Its a common misconception that cloud storage APIs are similar enough that moving from one provider to another is just a matter of changing a host name in a configuration file.

This might have been mostly true in the early stage of cloud but as youll see, its far from being true now.

Lets compare key elements of Google Cloud Storage API (GCS) to AWS S3 API (S3): Multipart Upload or how to efficiently upload large pieces of data Object-level tagging or how to assign easily searchable metadata to objects Object versioning or protecting against accidental deletion and providing rollback to your users Replication or how to make sure theyre always a copy of your data somewhere else Google Cloud Storage Amazon S3 Multipart upload The application needs the logic API tracks the pieces Object-level tagging Not available Supported since Nov, 2016 Object versioning DELETE request without version moves from master to archive.

DELETE without version specified applies DELETE marker to master.

You still get the latest version of an object if master is deleted.

Replication Data stored redundantly with Multi-Regional Storage in a fixed manner.

Flexible and dynamic control with Cross Region Replication API Multipart upload Though GCS does have a method for merging multiple object into a single larger one, it lacks a counterpart to AWSs popular multipart upload API.

Upon receiving the complete multipart upload request, Amazon S3 constructs the object from the uploaded parts.

In that model, S3 keeps track of all the uploaded parts of a MPU.

For example, aborting an MPU will remove all associated parts and they take care of managing the state of your upload for you.

Amazon S3 File Upload Api Composite Catalogue Full Final Object

In GCS, youre in charge of keeping track of each part, of piecing them together and you have to write the corresponding logic: You upload parts of your object as individual objects in a bucket Perform a compose method on that list of objects, limited to 32 item per operation You repeat the compose operation by batches of 32 until the entire full final object is stitched together.

This clearly is a cumbersome process, its possible to merge in parallel for faster stitching together of a large object but its not trivial and requires a somewhat complex logic on the client side.

Developers also need to keep in mind that GCS allows a maximum of 1024 parts, while S3 allows 10,000 and both share the same 5TB maximum file size.

Update: On June 21, 2018 GCS removed the limit on the number of components in a composite object.

Object-level tagging Object tagging is a way to categorize data with multiple key-value pairs.

Its a useful way to locate data and is much more powerful than object name prefix-based search.

You can think of object tagging as similar to Gmail tags by opposition to filesystem folders.

Objects tags can also influence S3 Lifecycle and cross region replication policies.

This functionality can not be migrated over from S3 to GCS, so check if your application requires tagging.

But both implementation differ in subtle ways that make them not fully interchangeable.