![]() ![]() Automatic synchronization of databases is available for any mobile device with Atlas App Services.Change streams are available to trigger events when needed.Drivers are available for popular languages used in blockchain development, such as Go, JavaScript, and C++.It has graph chain capabilities with $graphLookup to help efficiently query the blockchain.Its flexible schema makes it easy to store complex objects such as transactions.MongoDB Atlas, the database-as-a-service cloud solution from MongoDB, is perfect for storing a blockchain ledger. When a blockchain is created, each block needs to be stored in a central location so that the blockchain itself can be queried or add new blocks to the chain. Those hybrids are called blockchain databases and try to use the best of both worlds to create a secure and immutable chain of easily queryable blocks that offers excellent performance. The verification methods to ensure data integrity can slow down the querying and general performance of a blockchain.ĭatabases provide blazing-fast access to the data.īlockchains can be fully decentralized and not rely on any central authority.ĭatabases are centrally managed, and an administrator owns and controls the data.Įven though databases and blockchains are typically seen as two different items, it is possible to create a hybrid. The blockchain structure makes it virtually impossible for someone to change the data without breaking the chain.Ī malicious actor can potentially alter data if necessary measures are not taken.ĭata can only be read or added to the blockchain.ĭata can be created, read, updated, or deleted (CRUD operations). Databases generally don’t use signed blocks to store the data. While blockchains can be considered a database, a database is typically not a blockchain. Blockchains only differ from other database types by the way they store data. ![]() The ultimate goal of a blockchain is to store information, which makes it a database. What is the difference between blockchain and database? This is where blockchain databases come into play.īy combining the power of modern databases with the integrity of blockchains, blockchain databases offer a way to securely store data while still providing easy ways to query the data from the transactions. Querying the data can also be challenging, and the speed of read operations is nowhere near that of a database. Any new transactions need to be validated by all the nodes, and this can be a lengthy process, depending on the size of the blockchain itself. The main limitation is around the performance when it comes to querying the database. These movements are referred to as transactions.īlockchains can seem like a great solution to store information, but they do come with a price. In a blockchain, one can create and transfer assets over to another entity. Thanks to the way that blockchains work, they are ideal for storing asset information. This immutability is why blockchains have gained popularity in industries such as finances and real estate. They are also managed by a set of decentralized nodes, removing the need for a central authority to control all the transactions. No information that is included in the data of the blocks can be changed. Even if a node could regenerate those signatures, the changes would need to be accepted by a majority of the nodes hosting the blockchain.įor these reasons, blockchains are immutable. To ensure that the following blocks still work, a new signature would also need to be generated for each of them. To make the block valid again, this signature would need to change. If any of the information in the data inside the block is altered, the signature becomes invalid. ![]() Nowadays, other methods for validating have emerged, such as the proof of stake (PoS). This way of validating new blocks is called the proof of work (PoW) and was very prevalent in the early days of blockchain technology. Once the block has been validated, it is added to all the nodes of the blockchain. Any new block needs to be validated with the majority of the validation nodes forming the blockchain. To do so, it will use the nonce field to brute force possible solutions. To sign a new block, a node needs to find an SHA-256 signature that matches specific criteria. The data is stored as signed blocks, which link to each other, creating a chain of immutable interconnected data entries. Blockchains are used as a digital ledger to store transactional information. To understand what blockchain databases are, it is crucial to understand what a blockchain is. ![]()
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