Re: [QUESTION] How does Git ref backend work

>
> 1. I noticed that normally refs transactions use the refs files-backend,
> looking at the reference transaction of refs files-backend alone:
> First, it opens a transaction in memory, then multiple update items
> are added in memory, and finally, when the reference transaction
> is committed, it creates a ref.lock for each update item, renames it
> to the real address of the ref.
>
> but there seems to be some packed-backend logic coupled inside of
> files-backend. This makes me wonder why these ref backends are not
> independent?
>
> 2. Is the reftable backend in a usable state? How can I enable it?
> I couldn't find any clues on https://www.git-scm.com/docs/reftable.
> 3. Will future git refs backend possibly support external storage media
> e.g. Redis?
>