Galaxy Network will create a new generation of fog CDN, which touches tens of thousands of smart devices and makes them network nodes. As a public chain of the POC consensus mechanism, Galaxy Network is equipped with smart contracts to support the development of Dapps. At the same time, it will also use mature and stable underlying technologies to support enterprises in the Galaxy Network side chain to establish an alliance chain ecology according to their own needs.
Fog CDN is more decentralized. Compared with the collective state of the cloud, the fog state is a discrete state. Data is distributed and stored in edge devices rather than centralized servers. Multi-(weak) centralized CDN acceleration, such as Optical modems, routers, desktop mining machines, NAS, computers, pads, mobile phones, etc., there are no site restrictions, no broadband requirements, just stable online. The combination of stored data and scalability is very important for the role of fog CDN. Through blockchain technology and POC consensus, fog CDN can really be implemented.

Project Properties

Cost:
The cost is divided into storage cost and acceleration cost. Under the same conditions, storage costs are 80% lower than public cloud storage costs, and acceleration costs are 90% to 95% lower than traditional CDN costs.
Experience:
Customers are concerned about the extractability and transmission experience of data. Due to the quantity, integrity and geographical uncertainty of data distribution, other distributed storage networks cannot integrate with public cloud Competing in terms of experience does not have the commercial capabilities of mainstream scenarios. Galaxy Network surpasses the public cloud in terms of transmission experience. We define a download rate greater than 100Mbps, which is 100 times faster than IPFS, and will break through the transmission capacity of 500Mbps to 1000Mbps in the future.
Data Integrity:
If any successful Put operation saves data D under the key key, then there is no limited opponent A that can make the client execute the Get operation on the key key D' is accepted, where D' is not equal to D.
Storage reliability:
A successful Put operation is defined as (D, f, m), its input data is stored in m independent storage miners, and its Can tolerate up to f faulty storage miners. If there are less than f faulty storage miners, the Get operation on storage data is successful.
For example, after the data is channel coded [1,16], the coded strips are stored on 25 storage miners and accelerated miners. The first storage miner stores a coded copy R of the complete data D, and the 2nd to 25th Miners save encoded copies of 1/16 data volume. This scheme is 1+16+8 redundant backup, m = 25, f = 10, less than 10 miners fail, and the Get operation is successful.
Publicly Verifiable:
For each successful Put operation, the storage network's storage miners can generate proof that the data is being stored. This proof of storage must convince any valid verifier who only knows the key but does not have access to the data corresponding to the key.
Publicly Auditable:
Publicly Auditable means if all storage proofs of operation traces are stored publicly, and can be checked in the future that the data was indeed stored at the correct time.
Incentives:
If storage miners and acceleration miners are rewarded for successfully providing storage and acceleration services, or punished for cheating. The dominant strategy of all storage miners and accelerated miners is to store data and cache data, and keep it online.

Application scenario

Decentralized Database
A decentralized database is a serverless, distributed, P2P database. It is an eventually consistent database that uses CRDTs for conflict-free database merges, making the decentralized database an excellent choice for DAPPs, blockchain applications, and offline-first web applications. Decentralized databases can rely on Galaxy's high-reliability storage, ultra-high-speed transmission capabilities, and powerful deduplication capabilities to build commercial database services.
Decentralized databases provide various types of databases for different data models and use cases:
log: append-only, traversable, immutable log records. Useful for the latest N records use case or as a message queue.
feed: mutable log with traversable history. Entries can be added and deleted. Useful for shopping cart type use cases, or for example as a blog post or tweet.
key/value: key-value database.
docs: A document database, JSON documents can be stored and indexed by specifying key values. Useful for building search indexes or versioning documents and data.
counter: Used to count events separate from log/source data.
Real-time chat system
Build a distributed peer-to-peer chat application based on the Galaxy Network.
Image hosting website
Build an image hosting website based on Galaxy Network. The whole application runs on the concept of decentralization, which means that instead of hosting the information on our central server, the data is stored by everyone who wants it. When an image is placed on the Galaxy Network, it is given a hash, a 46-character long digital fingerprint. No other file can have it, and if the same file is added twice, their hash will be exactly the same, which means that even if the image hosting site is down, just knowing the hash will allow the image to be found on the web.
Decentralized mail system
The decentralized mail system allows customers to send files as e-mail connections. Since the files are stored using the Galaxy Network, the files cannot be deleted. This is the easiest way to send unlimited files anywhere in the world.
Peer-to-peer encrypted file system
A peer-to-peer encrypted file system with secure file sharing designed to resist surveillance of data content or circle of friends. It will be a secure email replacement with some interoperability with email. There will also be a completely private and secure social network where users can control who sees what (enforced encrypted).
Decentralized editor
Decentralized editor that allows simultaneous writing of text. In addition to making live changes to a given document, it allows read-only nodes to track changes in real time. It also allows publishing self-contained snapshots of documents to the Galaxy Network.
Ultra HD 4K video platform
Based on the storage and ultra-high-speed distribution capabilities of Galaxy Network, build 4K video distribution applications based on set-top boxes and smart TVs. And allow users to upload videos and share them with others.
Galaxy Network based search engine
Galaxy Network based search engine. Sniff DHT content and index file and directory hashes. Extract metadata and content, use ElasticSearch 5 for searching, and RabbitMQ for queuing.
Decentralized Web Publishing System
Deploy web content based on Galaxy Network, and specify your own domain name for publishing.
Git storage system
Use the Galaxy Network to deploy the Git version system, and use the Git compatible protocol on the client side to push and pull data from the Galaxy Network.
File Sharing System
Build a file sharing system among friends based on Galaxy Network.
Decentralized Blog
Construct a blog system based on Galaxy Network.
Decentralized Log System
The Decentralized Log System is an immutable, operation-based conflict-free replicated data structure (CRDT) for distributed systems. It is an append-only log that can be used to simulate mutable shared state between peers in p2p applications. Each entry in the log is saved in the Galaxy Network, and each entry points to a hash of previous entries that form the graph. Logs can be forked and rejoined together.
Ultra-high-speed CDN
Low-cost audio and video ultra-high-speed CDN solution.