Скачать или смотреть Sharding with OmniLedger and NEAR | Stanford Blockchain Club

One of the many approaches to address the issue of scalability within blockchain is to look at sharding. Sharding is ultimately about breaking a large problem like blockchain into manageable units and hopefully, the efficiency gained by having smaller units working in tandem will help bring about greater scalability. However, not surprisingly, the complexity lies in the detail, including how do handle cross-shard protocol where latency will be an issue.
These two technical presentations will propose their different approaches toward applying sharding toward greater scalability.

OmniLedger:

Philipp Jovanovich is an authority on blockchain scalability and one of the creators of the OmniLedger Protocol. He is a cryptographer and researcher at the Swiss Federal Institute of Technology Lausanne (EPFL), a member of the Initiative for CryptoCurrencies and Contracts (IC3) and a scientific advisor to the DFINITY project.

Summary:
Designing a secure permissionless distributed ledger (blockchain) that performs on par with centralized payment processors, such as Visa, is a challenging task. Most existing distributed ledgers are unable to scale-out, i.e., to grow their total processing capacity with the number of validators; and those that do, compromise security or decentralization. We present OmniLedger, a novel scale-out distributed ledger that preserves long- term security under permissionless operation. It ensures security and correctness by using a bias-resistant public-randomness protocol for choosing large, statistically representative shards that process transactions, and by introducing an efficient cross- shard commit protocol that atomically handles transactions affecting multiple shards.

   • Philipp Jovanovich introduces OmniLedger  
https://eprint.iacr.org/2017/406.pdf

Near Protocol:

Alex Skidanov
The first engineer at MemSQL responsible for building sharding implementation that now powers the likes of Goldman Sachs, Uber, Pinterest, Akamai, and Comcast will share his experiences of building industrial-grade solutions and applying it for the blockchain scaling. (  / alexskidanov  )

Summary:
Near Protocol, which shards both the state of the network and the processing of the transactions, scales capacity linearly with the number of nodes and provides a future-proof platform for decentralized applications. Alex Skidanov will walk the audience through how sharding is done in a commercial database space, and what's the missing ingredient in scaling blockchain today:
1. Approaches to atomic cross-shard transactions in the sharded blockchains.
2. Comparison of the approaches to scalability, level 2 vs sharding.
3. How will smart contracts be written, and executed behind the scenes, once the state of the smart contracts is sharded.

https://nearprotocol.com/
   • Sharding Talk at Blockchain @ Berkeley | A...  

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