Solana is a blockchain designed to support scalable decentralized applications (gapps). One of the key distinguishing features of Solana is its Proof of Stake (PoS) consensus system, which is backed by Tower Consensus. This is a variant of the system known as Practical Byzantine Fault Tolerance (PBFT), it allows distributed networks to reach consensus despite attacks from malicious nodes.

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rough agave perf timeline:

2.2:
- almost completely mmap free
- tx execution nearly I/O free with upcoming WAL fix and --disable-accounts-disk-index
- 2x block sizes

2.3:
- tx execution I/O free
- isolated arenas for banking and replay
- isolated banking and replay threads

rough agave perf timeline:. - almost completely mmap free.