cross-posted from: https://discuss.online/post/5484255
February 22, 2024 Bluesky writes:
Up until now, every user on the network used a Bluesky PDS (Personal Data Server) to host their data. We’ve already federated our own data hosting on the backend, both to help operationally scale our service, and to prove out the technical underpinnings of an openly federated network. But today we’re opening up federation for anyone else to begin connecting with the network.
The PDS, in many ways, fulfills a simple role: it hosts your account and gives you the ability to log in, it holds the signing keys for your data, and it keeps your data online and highly available. Unlike a Mastodon instance, it does not need to function as a full-fledged social media service. We wanted to make atproto data hosting—like web hosting—into a fairly simple commoditized service. The PDS’s role has been limited in scope to achieve this goal. By limiting the scope, the role of a PDS in maintaining an open and fluid data network has become all the more powerful.
We’ve packaged the PDS into a friendly distribution with an installer script that handles much of the complexity of setting up a PDS. After you set up your PDS and join the PDS Admins Discord to submit a request for your PDS to be added to the network, your PDS’s data will get routed to other services in the network (like feed generators and the Bluesky Appview) through our Relay, the firehose provider. Check out our Federation Overview for more information on how data flows through the atproto network.
The inclusion of some kind of web3 identifier that never seemed to get used for web3 things comes to mind. The methodology of most federation work also seems to indicate that hosting an alternative server may require significantly more resources compared to an ActivityPub server, though this may be outdated information.
I also don’t particularly like their moderation strategy. It seems very Nostr-like, and it’s more about hiding things than actually blocking things.
They also felt like they needed to invent their own notation language to describe their protocol, which makes reading the protocol spec kind of weird.
They also decided to use Javascript’s 53 bits of integer precision as an upper bound for their protocol. I certainly wouldn’t have designed my cross-platform protocol around the programming language I happened to choose.
Lastly, Bluesky offers a flag to suggest clients hide your profile and posts, but doesn’t have the ability to hide that data. With ActivityPub, you can simply refuse to list posts and maintain some amount of privacy (especially combined with enabling follow requests), but AT doesn’t seem to care much about that.