Ethereum sharding is the network upgrade designed to resolve the scalability problem.
The long-awaited solution still looms on the horizon with no exact date for implementation. Nonetheless, it is important to investigate the Ethereum sharding technology now so as to make use of it at its fullest upon release.
Ethereum sharding refers to a scalability solution proposed for the Ethereum blockchain. It aims to improve the network's performance by dividing the blockchain into smaller pieces called shards. Each shard operates as an independent chain with its own set of smart contracts and transaction history.
The goal of sharding is to increase the throughput and capacity of the Ethereum network by allowing multiple shards to process transactions in parallel. This approach helps alleviate congestion and reduces the burden on the main Ethereum chain, also known as the "mainnet."
In a sharded Ethereum network, validators are assigned to specific shards, and they only validate transactions and execute smart contracts within their assigned shard. This parallel processing capability enables the network to handle a significantly larger number of transactions compared to the current Ethereum architecture.
The Ethereum mainnet relies on a distributed network of nodes that support the network. Each Ethereum node stores information about all transactions that have ever happened within the network since its launch.
Initially, Ethereum was working on the proof of work consensus mechanism. It implies solving complex computational tasks for the new nodes to be created.
In accordance with the development roadmap, the network launched a PoS-based Beacon chain on December 1st, 2020. Finally, in September 2020, the Merge event took place as the whole network switched to PoS.
Thus, Ethereum has transferred to the proof of stake consensus and overcome the problem of excessive electricity consumption inherent to PoW-based systems. Yet, the system remained unscalable.
At the time of writing, it already features comparatively low fees and fast transaction speed. Yet, it’s still not ready to withstand high network congestion.
With the advance of Ethereum 2.0, the system should implement sharding so as to solve its last problem.
When Ethereum implements sharding, it will divide the network into smaller groups of nodes called shard chains. Each of these shards will process unique sets of transactions and then broadcast these subsets to the rest of the network.
Here’s what it’s going to look like in practice.
Assume, there are 10,000 validators who support the Ethereum network and 100 shard chains.
Note that validators don’t need to verify every separate transaction on the network. To reduce the time and power needed for the verification, validator nodes only check the signatures of every group of transactions as a whole.
The new approach can help to solve a number of problems inherent to the Ethereum blockchain. At this, Ethereum sharding comes with the following advantages:
While the advantages of Ethereum sharding are obvious, there are also some concerns to address as well:
Vitalik’s team is surely aware of all these challenges. At this, its members work on various solutions to stand against all the potential risks.
Here’s what the Ethereum roadmap includes:
Implementing sharding on top of a working blockchain is way harder than doing that from scratch.
At this, Ethereum’s team is very careful with its forecasts. The official roadmap only mentions sharding among potential branches of development but doesn’t give any specific timeline for its implementation.
Many online resources claim that the ETH upgrade can be expected at “any time in 2023”. Yet, no one has ever announced any specific date.
So far, Ethereum’s team has remained true to its words as it moves on along the predefined roadmap. Thus, all we can do now is wait for the good news to come out.
Ethereum sharding must be implemented and must be effective in order for the Ethereum gas fees to be bearable.
In the meantime, PulseChain is launching soon as a full system state copy of Ethereum.
It will have hundreds of projects launches natively, including PulseChain, and has hundreds of thousands of users already.
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Kate is a blockchain specialist, enthusiast, and adopter, who loves writing about complex technologies and explaining them in simple words. Kate features regularly for Liquid Loans, plus Cointelegraph, Nomics, Cryptopay, ByBit and more.
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