What is the difference between blockstore and datastore?

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1

Hello.
I would like to know what is the difference between blockstore and datastore.

When I analyzed the code, it seems that datastore simply has the function of key-value DB (e.g., Put, Delete, Get, Has)

In blockstore, it looks like it uses CID as a key and calls the datastore function internally to perform a specific function (e.g., DeleteBlock, GCLock).

In other words, is it right that blockstore has datastore functions + GC processing?

Thank you.

2

When I analyzed the code, it seems that datastore simply has the function of key-value DB (e.g., Put, Delete, Get, Has)

Yes exactly

In blockstore , it looks like it uses CID as a key and calls the datastore function internally to perform a specific function (e.g., DeleteBlock, GCLock).

Exactly

Datastore is a generic KV store used to store such as MFS metadata, DHTServer data, PeerStore data (note, not the default option), or blockstore data.

Blockstore only deals with IPLD blocks, some blockstore implementations use a blockstore as storage (such as for badgerds), other writes files on disk (such as flatfs).