Hyperledger fabric ledger

1. What is ledger in hyperledger Fabric?
2. How is data stored in a ledger in hyperledger?
3. What are the two components of the ledger in hyperledger Fabric?
4. Where is the ledger stored hyperledger?
5. How is data stored in Hyperledger Fabric?
6. What type of files are used in Hyperledger Fabric?
7. What is immutable in Hyperledger Fabric ledger?
8. Is Hyperledger private or public?
9. Where are the blocks stored in Hyperledger Fabric?
10. What are the databases supported by Hyper ledger?
11. What is smart contract in Hyperledger Fabric?

What is ledger in hyperledger Fabric?

A ledger is a key concept in Hyperledger Fabric; it stores important factual information about business objects; both the current value of the attributes of the objects, and the history of transactions that resulted in these current values.

How is data stored in a ledger in hyperledger?

the blockchain data, aka the ledger, is stored as a physical file. it contains linked blocks, each block consisting of a set of transactions. Each state change is stored there. By contrast, the world state only contains the current state of every asset as that's what applications need.

What are the two components of the ledger in hyperledger Fabric?

Hyperledger Fabric has a ledger subsystem comprising two components: the world state and the transaction log. Each participant has a copy of the ledger to every Hyperledger Fabric network they belong to.

Where is the ledger stored hyperledger?

1 Answer. If you run blockchain platform on your machine, it will be stored in your local machine. If you run it on cloud, it will be stored on cloud.

How is data stored in Hyperledger Fabric?

the actual private data; data is stored in a private database on the peer nodes of authorized organizations and is accessed from chaincode on these authorized peers; and. a hash of that private data; endorsed, ordered, and written to the ledgers of every peer on the channel.

What type of files are used in Hyperledger Fabric?

yaml file used to generate your Hyperledger Fabric network, use the configtxgen tool to create a initial binary configuration definition for a new channel.

What is immutable in Hyperledger Fabric ledger?

Ledger Features — The immutable, shared ledger encodes the entire transaction history for each channel, and includes SQL-like query capability for efficient auditing and dispute resolution.

Is Hyperledger private or public?

Because Hyperledger Fabric is private and requires permission to access, businesses can segregate information (like prices), plus transactions can be sped up because the number of nodes on the network is reduced. Fabric 2.0 was released in January 2020.

Where are the blocks stored in Hyperledger Fabric?

Each time a block is committed the blockfile will be written to and fsynced. The state database is saved in LevelDB (ledgersData/stateLeveldb directory) or an external CouchDB. Each time a block is committed the state updates for the block will be committed to the state database.

What are the databases supported by Hyper ledger?

Hyperledger Fabric uses state databases to store the ledger records in the World State. The State Database includes LevelDB and CouchDB to be flexible for the developer to verify the records.

What is smart contract in Hyperledger Fabric?

Hyperledger Fabric users often use the terms smart contract and chaincode interchangeably. In general, a smart contract defines the transaction logic that controls the lifecycle of a business object contained in the world state. It is then packaged into a chaincode which is then deployed to a blockchain network.