Persistence Replacement Bundle

[oten91]

The IAVL store (Cosmos’ app level storage tree) is the legacy implementation that serves as both the merkle root integrity structure and the general purpose database structure for reads. Though the structure is seemingly efficient at generating merkle roots for the ABCI AppHash, Pocket Network observes a considerable downgrade in performance for historical queries, block processing, and overall disk size management. The idea behind Pocket Network’s Persistence Replacement is to preserve the efficient state commitment root generation while providing an alternative implementation for DB reads. The idea is to prune N-X IAVL versions in order to enable merkle tree generation, while maintaining a completely separate storage layer for efficient storage, historical queries, and block processing. The idea and design is very similar to Cosmos’ ADR-40.

Required Goals:

• Simpler Codebase
• Non-Consensus Breaking
• Comparable syncing performance
• Comparable disk usage

Additional Goals:

• Faster historical queries
• Faster current queries
• Smaller disk usage
• Better syncing performance
• Slower disk usage rate