Sharding

Sharding is a technique that divides a blockchain into smaller parts called shards. This lets the network perform multiple tasks at the same time.

What is sharding?

Normally, many computers in a blockchain have to check and keep track of all transactions. This can make the network busy and slow.

Sharding divides this work among smaller groups. Each shard processes its own share of the data and transactions. This means different shards can work at the same time, instead of handling everything one item at a time.

Sharding is a Layer 1 solution: it’s part of a blockchain’s technical foundation. The shards need to work well together. Otherwise, errors can occur—for example, the same crypto could be spent twice.

A simple example of sharding

Imagine a large supermarket with only one checkout. Everyone has to wait, even if plenty of staff are available.

With multiple checkouts, customers can pay at the same time. Sharding works in a similar way: it divides the work across multiple parts of a blockchain. This lets the network process more transactions at once.

Why is sharding important in crypto?

Sharding can help a blockchain process more transactions. Computers that support the network may also need to process less data. This can reduce the network’s workload and may help lower transaction fees.

In crypto news, you’ll often see sharding mentioned in updates about scalability: a blockchain’s ability to handle more users and transactions. Announcements about technical improvements may also mention the term.

Sharding is complex, though. Transactions between different shards are harder to manage. Smaller shards may also be more vulnerable to attacks if they have fewer validators. So, more processing capacity doesn’t automatically mean a network will always be cheaper, faster, or more secure.