This article highlights key differences between World State Database (DB) and Transaction Logs which comprise the Hyperledger Fabric Distributed Ledger.
Hyperledger Fabric Distributed Ledger can be said to be a combination of World State Database (DB) and transaction logs. It requires invocation of chaincode (smart contracts) for interacting with distributed ledgers (world state DB and transaction logs). The transactions are stored in the block in the same sequence in which they occured and this is responsibility of ordering service to ensure the ordering sequence of transactions in the block.
| World State Database | Transaction Logs |
|---|---|
| Stores the chain’s state information in form of key-value pairs | Stores chain of blocks consisting of transaction details in form of sequence of transactions |
| Stored in database such as LevelDB or CouchDB | Stored as files in peer file system (local or attached storage) |
| Analogy: Classical Database such as RDBMS or NoSQL | Analogy: Write Ahead Logging (WAL) |
| Can be regenerated/recreated from transaction logs | — |
I have been recently working in the area of Data analytics including Data Science and Machine Learning / Deep Learning. I am also passionate about different technologies including programming languages such as Java/JEE, Javascript, Python, R, Julia, etc, and technologies such as Blockchain, mobile computing, cloud-native technologies, application security, cloud computing platforms, big data, etc. For latest updates and blogs, follow us on Twitter. I would love to connect with you on Linkedin.
Check out my latest book titled as First Principles Thinking: Building winning products using first principles thinking. Check out my other blog, Revive-n-Thrive.com
Check out my latest book titled as First Principles Thinking: Building winning products using first principles thinking. Check out my other blog, Revive-n-Thrive.com
Latest posts by Ajitesh Kumar (see all)
- MSE vs RMSE vs MAE vs MAPE vs R-Squared: When to Use? - April 25, 2024
- Gradient Descent in Machine Learning: Python Examples - April 22, 2024
- Loss Function vs Cost Function vs Objective Function: Examples - April 19, 2024
Leave a Reply