CID Sampling
Each committee is assigned a random (CID, Storage Provider) pair to test.
As stated in the overview page, when Filecoin Storage Providers accept LDN FIL+ Storage deals, there is an agreement to make all the data available for “fast retrieval”. This means as well as storing the sealed copy of the data, another “hot copy” of the data must be stored so that is can be retrieved without having to unseal the sealed copy.
In this step of the protocol, each committee is deterministically and randomly assigned a CID and a Storage Provider that stores that CID ready for fast retrieval, as per the agreement of FIL+ LDN.
Learn more in the following resources:
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