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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
You can always compare the contents of two servers, though, to see what's missing from one. I've also brainstormed about adding a DAG in post metadata to help detect censored/missing data within a single user's posts (https://github.com/NfNitLoop/feoblog/issues/30) but I don't see a need for it at the moment.
How do you ensure that the peers (feo nodes?) reach consensus on what is the right data? I feel like you are reinventing a blockchain here. Shameless plug, you could consider using NEAR protocol as your platform (implemented in Rust and you can write your application login in Rust as well), which will take care of the decentralization part for you while you focus on the blog platform features. https://docs.near.org/docs/tutorials/contracts/intro-to-rust (just to give you an example, here https://near.gagcraft.com/ is one of the front-ends to the data stored on NEAR, and here is the “backend” that exposes the possible actions: https://github.com/zavodil/memepool/blob/master/contract/src/lib.rs)