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GeekGene / mewsfeed

For the calm cats
https://mewsfeed.social
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Consider refactoring DNAs to facilitate data migration between cells in integrity updates #88

Open mattyg opened 1 year ago

mattyg commented 1 year ago

Consider refactoring DNAs to make it as easy as possible to upgrade integrity zomes and port data into a new DHT.

We may not want to facilitate this at all, and instead rely on coordinator zomes fetching the underlying data from a prior versions running cell.

If we did want to facilitate migrating data into subsequent version's cell, I think this means not relying on ActionHash as the "id" for some data, and instead storing a UUID within the Entry, and then linking from a UUID anchor to the Entry itself.

dauphin3 commented 1 year ago

regardless of the choice, I think it might be nice to have a uuid anchor in the entry

mattyg commented 1 year ago

regardless of the choice, I think it might be nice to have a uuid anchor in the entry

Why do you think this is valuable? As compared to using a HRL for cross-dna unique identifier, and an ActionHash for an in-dna unique identifier?

dauphin3 commented 1 year ago

either one, maybe both.. would make for a good discussion, I will need to think more about it

perhaps describe more your thoughts on HRL :)

On Wed, Mar 22, 2023 at 9:49 AM Matt Gabrenya @.***> wrote:

regardless of the choice, I think it might be nice to have a uuid anchor in the entry

Why do you think this is valuable? As compared to using a HRL for cross-dna unique identifier?

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mattyg commented 1 year ago

either one, maybe both.. would make for a good discussion, I will need to think more about it perhaps describe more your thoughts on HRL :)

The idea of HRL is a standard way to reference stuff cross-dna. It follows this format: <DnaHash>:<AnyDhtHash>[@<AgentPubKey>]

See this for more context: https://hackmd.io/FbK0GP-vRb6WvdXctqJzhQ?both

Guillem already wrote a basic coordinator zome implementation that lets you request an HRL, and it converts that into a cell call under-the-hood to fetch the data. It need's to be pulled out into a holochain-open-dev package at some point: https://github.com/lightningrodlabs/we/tree/main/crates/hrl_locator