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Cold Storage

Let us address the most common questions you have about Cold Storage.

Is there a free tier on C14 Cold Storage?

Yes, there is a free tier and you can benefit from 75 GB of storage in C14 Cold Storage’s Glacier class for free with no time limit. In addition, you can also benefit from 75 GB of storage and 75 GB of outgoing and inter-regional transfer in Object Storage’s standard class.

How much do I pay to archive objects to C14 Cold Storage’s “Glacier” class or to restore them to Object Storage’s “Standard” class?

Nothing. Switching the object class from standard to glacier is free. Restoring objects from the glacier storage class to standard storage class is also free of charges.

I have started the restoration of an object, why is it not available instantaneously?

An object stored in the glacier class is listed but cannot be downloaded instantly. It needs to be restored in the standard class first. This is the principle of C14 Cold Storage. Objects are stored on a cluster that is no always up and running. The restoration of objects usually takes a few minutes.

For more information, refer to the documentation.

When should I use C14 Cold Storage’s “Glacier” storage class instead of Object Storage’s “Standard” class?

It really depends on your type of Object Storage usage. If you consider that a 3 months old object is rarely used but still has a value, you might want to send it to the glacier class, for example.

Can I upload an object directly to the “Glacier” class?

Yes, you can select the storage class (STANDARD or GLACIER) when uploading Objects using the Scaleway console. For more information, refer to our feature documentation. It is also possible when uploading using the API.

Why are Glacier class objects stored in Paris DC4? Is it accessible from buckets in all locations?

Our Paris underground databunker (DC4) provides an increased layer of security by being 25 meters deep below the surface in a bunker where the Glacier storage class cluster is available. This storage cluster is available from any bucket in Paris and Amsterdam and all objects can change the storage class to Glacier.


It is not yet possible to transfer files to Glacier in Warsaw, Poland.

When are lifecycle management rules applied?

The expiration & transition rules are evaluated every day at midnight UTC, but the actual action might take between one minute and twenty-four hours* after evaluation.

For example, a user wants to configure a lifecycle rule that moves an object after two days to Glacier:

  • Lifecycle Rules are checked everyday at midnight.
  • The user uploaded a file on April 6th, at 2:00 pm UTC.
  • The rule is triggered on April 8th, at 11:59 pm UTC.
  • The application of the rule can take up to 24 hours ⇒ The object will be transferred to Glacier no later than 11:59 pm UTC on April 9th.

When a LifeCycle rule is set for a very large amount of objects (several 100000s) simultaneously, the rule might take longer to be applied.

How do I encrypt my data?

For increased security, it is recommended to encrypt your data before sending them to C14 Cold Storage. Encryption should be done on the client-side to guarantee that there is no evidence of your private key stored on the cluster. Data can be encrypted using third-party solutions, like GPG. It is possible to automatize your backups and to encrypt them using a solution like Duplicity or Rclone using the crypt backend.

The GDPR requires that the life span of data be defined in two distinct cases:

  • The deletion of data after a certain period of time
  • The archiving of data that must legally be kept Lifecycle management features meet both of these requirements by allowing you to set a timeframe beyond which your data are archived or deleted.

What is the maximum data volume and object size supported by C14?

There is no maximum data size, C14 accepts an unlimited number of objects up to 5 TB each. Large objects can be uploaded using multipart upload.

Why is C14 Cold Storage technology much more reliable than tape storage technologies?

Firstly, C14 Cold Storage’s hard disk drive-based technology offers much better random data access time. In fact, it takes only a few milliseconds to access your data, whereas access to a tape platform requires:

  • A tape library to identify the cartridge on which the data is stored.
  • Reading several kilometers of tape to retrieve it.

In addition, C14 Cold Storage enables parallel writing to multiple disks simultaneously, providing very high read and write speeds. Redundancy is achieved by advanced parity mechanisms (6+3) on a large number of media, whereas tape technology does not allow this and is limited to CRC. Finally, there is no risk of mechanical part failure (ex: robot) or wear and tear (tape drive).

Can I change the storage class of an entire bucket from Object Storage Standard to C14 Cold Storage?

Yes, a best practice is to create a transition lifecycle rule with an empty prefix. In this case, all files contained within the selected bucket will have their storage class altered automatically on the dates stipulated by you. However, due to S3 Protocol restrictions, a lifecycle rule cannot be created to modify the storage class from glacier to standard.