This requires a content identifier that determines the physical location of a file. If the host changes its name or address, it must also be modified in the name service table.Ĭontent-based addressing storage pertains to the content to get data from the network. IP address) mapped to a user friendly name. This tracks a host by a logical addressing scheme (e.g. When a storage system is based on location, it is about identifying a server by its host name using a DNS server. An example of a location addressed storage system is the HTTP protocol.
What sets IPFS apart from typical Internet based storage systems on the cloud is that it is content-based (content addressed) and not location-based (location addressed). IPFS can be updated to point to different hashes, but anyone with the original hash can still access that data provided at least one node is still hosting that data now or any time in the future. Different nodes can also host the file as long as there is the hash pointing to it. The file itself can have different nodes pointing to it by its hash. Once a file is put into an IPFS blockchain it remains available until it is removed by unpinning a file and running a garbage collection routine. There are no duplicates on IPFS, because the hash will always refer to the file or a chunk of the file when it was uploaded.
FILE STORAGE SYSTEM DOWNLOAD
Whenever a file request is made, the hash of the nearest node that stores the file based on its root hash is used by the user to download the file. Users who want the file will access it based on the hash of the nearest node to their location.Īll nodes that host the file will reference a root hash that is the hash ID of the file. Other nodes can also host the same file thus allowing many copies of it to be made. These files are given a hash ID which can then be distributed across the network. Nodes are given an incentive for providing storage space on their computer or server for hosting files. They are incentivized to do so by a digital asset like Filecoin on an IPFS blockchain. This abstraction removes the complexity for application developers. IPFS thus provides an abstraction to the actual location of the file, so the actual physical location does not matter to the application. When someone requests that data, they are requesting that data directly by its hash ID and not the actual file itself. All data on IPFS is addressed by its hash ID. You can have different torrents pointing to the same file, but in IPFS you only need one hash ID that points to a file.įiles are not posted to IPFS in the same way as posting a file to the cloud. BitTorrent does not use a blockchain, but rely on torrents instead to point to files. It is efficiently coordinated to enable efficient access and lookup between nodes. The data is broken up into 256 KB chunks and spread across a network of nodes or computers. This stores files on a blockchain as key value pairs.
It is similar to the BitTorrent protocol, but different in the way they point to the file for sharing. The use of Distributed Hash Tables (DHT) for file system storage and retrieval is the core innovation for IPFS. The difference between a centralized and decentralized file storage.
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