Blockchain: Consensus Algorithm Key Performance Indicators, Trade-Offs, Current Trends, Common Drawbacks, and Novel Solution Proposals

Performance and reliability trade-offs for the double checkpointing algorithm

Fast checkpointing algorithms require distributed access to stable storage. This paper revisits the approach based upon double checkpointing, and compares the blocking algorithm of Zheng, Shi and Kalé [23], with the non-blocking algorithm of Ni, Meneses and Kalé [15] in terms of both performance and risk. We also extend the model proposedcan provide a better efficiency in [23, 15] to assess the...

Blockchain Consensus

In this paper, we present a new definition of Byzantine consensus that applies to blockchains, applications that allow to transfer digital assets through transactions. More precisely, a blockchain is a distributed abstraction where participants must reach a consensus on a unique block of transactions to be appended to the chain. This new consensus definition requires a validity property based o...

Metrics, Key Performance Indicators, and

There are numerous parameters that influence the availability of long range aircraft. In order to develop models evaluating aircraft availability, an understanding of these parameters, along with the corresponding metrics, is required. An analysis of historical data for a modern long range transport aircraft shows that unscheduled organizational-level maintenance and depot maintenance are the l...

Bias-Variance Trade-offs: Novel Applications

Consider a given random variable F and a random variable that we can modify, F̂ . We wish to use a sample of F̂ as an estimate of a sample of F . The mean squared error between such a pair of samples is a sum of four terms. The first term reflects the statistical coupling between F and F̂ and is conventionally ignored in bias-variance analysis. The second term reflects the inherent noise in F and ...

Performance Trade-offs of Tcp Adaptation Methods