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77 lines
3.8 KiB
Markdown
77 lines
3.8 KiB
Markdown
---
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title: Compute-to-Data
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description: Providing access to data in a privacy-preserving fashion
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slug: /concepts/compute-to-data/
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section: concepts
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---
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## Motivation
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The most basic scenario for a Publisher is to provide access to the datasets they own or manage. However, a Publisher may offer a service to execute some computation on top of their data. This has some benefits:
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- The data **never** leaves the Publisher enclave.
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- It's not necessary to move the data; the algorithm is sent to the data.
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- Having only one copy of the data and not moving it makes it easier to be compliant with data protection regulations.
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[This page](https://oceanprotocol.com/technology/compute-to-data) elaborates on the benefits.
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## Architecture
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### Enabling Publisher Services, using Ocean Provider
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The direct interaction with the infrastructure where the data resides requires the execution of a component handled by Publishers.
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This component will be in charge of interacting with users and managing the basics of a Publisher's infrastructure to provide these additional services.
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The business logic supporting these additional Publisher capabilities is the responsibility of this new technical component.
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The main and new key component introduced to support these additional Publisher services is named **Ocean Provider**.
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Ocean Provider is the technical component executed by the **Publishers**, which provides extended data services. Ocean Provider includes the credentials to interact with the infrastructure (initially in cloud providers, but it could be on-premise).
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### Compute-to-Data Enviroment (Operator-Service)
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The Operator Service is a micro-service that implements part of the Compute-to-Data spec [OEP-12](https://github.com/oceanprotocol/OEPs/tree/master/12),
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in charge of managing the workflow executing requests.
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Typically the Operator Service is integrated from Ocean Provider, but can be called independently if it.
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The Operator Service is in charge of stablishing the communication with the K8s cluster, allowing to:
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- Register workflows as K8s objects
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- List the workflows registered in K8s
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- Stop a running workflow execution
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- Get information about the state of execution of a workflow
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The Operator Service doesn't provide any storage capability, all the state is stored directly in the K8s cluster.
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<repo name="operator-service"></repo>
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### Responsibilities
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The main responsibilities are:
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- Expose an HTTP API allowing for the execution of data access and compute endpoints.
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- Authorize the user on-chain using the proper Service Agreement. That is, validate that the user requesting the service is allowed to use that service.
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- Interact with the infrastructure (cloud/on-premise) using the Publisher's credentials.
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- Start/stop/execute computing instances with the algorithms provided by users.
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- Retrieve the logs generated during executions.
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- Register newly-derived assets arising from the executions (i.e. as new Ocean assets) (if required by the consumer).
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### Flow
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In the above diagram you can see the initial integration supported. It involves the following components/actors:
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- Data Scientists/Consumers - The end users who need to use some computing services offered by the same Publisher as the data Publisher.
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- Ocean Keeper - In charge of enforcing the Service Agreement by tracing conditions.
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- Operator-Service - Micro-service that is handling the compute requests.
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- Operator-Engine - The computing systems where the compute will be executed.
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Before the flow can begin, the following pre-conditions must be met:
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- The Asset DDO has a compute service.
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- The Asset DDO must specify the Ocean Provider endpoint exposed by the Publisher.
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- The Service Agreement template must already be predefined and whitelisted `on-chain`.
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