Every Chain has its own system to handle transactions and other things. Bitcoin and Ethereum are POW. It means proof of work. Proof of work allows the nodes to agree on the state of all information and prevent any attacks. proof of work is the mechanism in a decentralized Ethereum network to handle transactions and other things. This system prevents users from ‘double spending’ their coins and any attacks.

But Ethereum is moving to POS and changing network mechanisms. Right now Terra network works with POS. it means proof of stake.

Proof of Stake requires users to stake their Ethereum. Then they become a validator in the network. Validators are like miners in Proof of Work to handle transactions and other things. Any users with 32 Ethereum can be a validator.

Fault tolerance is an essential property of large data systems because it enables a failure-free execution and prevents performance degradation. When a system fails, Fault-tolerant is a property of a system that continues to operate. Fault tolerance is particularly sought after in high availability or life-critical systems. The ability to maintain functionality when a portion of a system breaks down is considered graceful degradation. A fault-tolerant design enables a system to continue its intended operation, possibly at a reduced level, rather than failing when some part of the system fails.

There are too many data and transactions on the Ethereum network. Ethereum team can not risk on their network. It causes so many problems for them. So Not using Fault-Tolerant puts validators at Risk. Also, Running a backup system has too many problems and needs an expert for normal users. So this technology can help helo normal users.

Fault-Tolerant

Obol

Obol Network is a Secret Shared Validator (SSV) network that enables the provisioning of trustless infrastructure on the Ethereum Network.

This will provide institutions, self-stakers, and pool operators the ability to create their own staking environments with superior fault tolerance, resiliency and robustness without the need to integrate multiple providers or deploy complex infrastructure configurations.

Advantages and disadvantages of Fault-tolerant Stake

The most crucial advantage of a fault-tolerant stake it prevents the network from failing. It means if one validator goes offline the other continue and keeps the network online.

An advantage of FTS is that it uses backup components that automatically replace failed components so there is no loss of service

It helps Ethereum to achieve its biggest goal. I mean decentralize Ethereum.

If both the primary and backup validators become operational at the same time, it signifies that the validator key is active in both locations and has signed two messages at the same time.

If they can not provide enough validators, Maybe it cause failure too.

It's possible that more than a third of the validators are unavailable. This implies that the past's troubles have not yet been fully resolved.

what problems FTS might help solve?

Increase the scalability of ETH. As workload lightens, more validators will participate in ruuning nodes. Additionally, more ETH will be staked because stakers may not trust a single node operator but will trust a group of node operators working together.