Research Area: Blockchain Technology
Since its inception blockchain technologies have grown tremendously. Their vast success can be attributed to both the research community and the industry. Although, initially, blockchain was confined to financial sector only, its decentralized and immutable ledger availability has made it popular for nonfinancial services as well. These include applicability in energy and memory constrained Internet of Things (IoT) devices as well. However, the ever-increasing size of blockchains like Bitcoin, Ethereum, and so on has led to issues of scalability. Linear order of blockchain is now being changed to directed acyclic graphs (DAGs) based chains. Different approaches of side chain are also being explored to reduce processing time per transaction. Heterogeneous solutions are also being explored in this regard. It was observed that there are no descriptive work available explaining scalability concerns and solutions in present day blockchain scenario. In this chapter, we have covered chain partitioning-based scalability, DAGs-based scalability, and horizontal scalability through sharding and have discussed future directives.
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Author(s) Name: Gagandeep Kaur, Charu Gandhi
Journal name: Handbook of Research on Blockchain Technology
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Publisher name: Elsevier
DOI: 10.1016/B978-0-12-819816-2.00015-0
Volume Information: 2020, Pages 373-406
