# 67 Scaling Ethereum after the Shanghai Upgrade
The Ledger Podcast
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Ethereum - Is Sharding a Good Idea?
Sharding is mainly about dividing a blockchain into different subsets and then making sure that they talk to one another. Roll-ups are basically uncoring. So you have your own layer and you take a batch of a bunch of transactions. You have a second sector. Right now it's actually a problem in my eyes in the Ethereum ecosystem because all the seconds are completely centralized at this point on a cross-op team like a multi-tramp stock net. The Concoon upgrade, sorry, after the Shanghai upgrade, we expect to have like a times 100 red diction of the cost of using roll-up in the future.
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