Abstract
Blockchain technology has emerged, and many previous studies have assessed
its performance issues. However, less attention has been paid to the
dependability attributes, which have been a critical topic in service
provisioning, considering public or private infrastructures. This paper
introduces analytical models to assess the availability of private blockchain
infrastructure for Hyperledger Fabric-based applications. Furthermore, a case
study will be presented to demonstrate the feasibility of the proposed model,
which may assist stakeholders in deciding whether to migrate from old to new
technology. Some of the obtained results indicate that, unlike most
conventional systems, general availability may decrease as new nodes are added
to the environment. This phenomenon occurs due to the adopted endorsement
policy, which determines the proportion of required nodes to sign the
authenticity of a transaction.