Glossary OS

Plain meaning

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The punitive reduction of a validator's stake as a penalty for provable misbehavior such as double-signing or equivocation — confirming two conflicting blocks at the same slot. As of 2025, Solana does not yet enforce automatic on-chain slashing (unlike Ethereum), though it is a planned addition to the protocol; the primary deterrents currently are social consensus, stake withdrawal by delegators, and future slashing implementation. The lack of slashing means Solana validators face lower direct financial risk from bugs but also reduced cryptographic accountability compared to slashing-enabled networks.

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Slashing (slashing)
Category: Network
Definition: The punitive reduction of a validator's stake as a penalty for provable misbehavior such as double-signing or equivocation — confirming two conflicting blocks at the same slot. As of 2025, Solana does not yet enforce automatic on-chain slashing (unlike Ethereum), though it is a planned addition to the protocol; the primary deterrents currently are social consensus, stake withdrawal by delegators, and future slashing implementation. The lack of slashing means Solana validators face lower direct financial risk from bugs but also reduced cryptographic accountability compared to slashing-enabled networks.
Related: Validator, Stake

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Branch

Validator

A node that participates in the Solana network by validating transactions, voting on blocks, and (when selected as leader) producing new blocks. Validators run the Agave, Firedancer, or Jito client software, require significant hardware (128+ GB RAM, high-core CPU, NVMe SSD), and earn rewards from inflation and transaction fees.

Vote Account Leader Schedule

Open term

Branch

Stake

SOL tokens that are delegated to a validator to increase its voting weight and earn staking rewards. Staking is non-custodial—stakers retain ownership of their SOL. Stake activates/deactivates at epoch boundaries with a warmup/cooldown period. Validators with more stake are assigned more leader slots and have proportionally more influence in consensus.

Delegator Stake Account

Open term

Next concepts to explore

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Core Protocol

Validator

A node that participates in the Solana network by validating transactions, voting on blocks, and (when selected as leader) producing new blocks. Validators run the Agave, Firedancer, or Jito client software, require significant hardware (128+ GB RAM, high-core CPU, NVMe SSD), and earn rewards from inflation and transaction fees.

Open term

Core Protocol

Stake

SOL tokens that are delegated to a validator to increase its voting weight and earn staking rewards. Staking is non-custodial—stakers retain ownership of their SOL. Stake activates/deactivates at epoch boundaries with a warmup/cooldown period. Validators with more stake are assigned more leader slots and have proportionally more influence in consensus.

Open term

Network

Solana Runtime v2

The next-generation execution environment under development by Solana Labs to replace the original runtime with a more modular, formally specified, and performant architecture that cleanly separates the Solana Virtual Machine (SVM) from the core validator client. Runtime v2 is designed to enable the SVM to be embedded in non-validator contexts (e.g., rollups, SVM-compatible chains), improve program execution performance, and provide cleaner abstractions for program loaders. It underpins the broader SVM ecosystem strategy and the Agave validator client.

Open term

Network

Skipped Slot

A slot in which the assigned leader validator fails to produce a block, resulting in no entries being added to the ledger for that slot. Slots are skipped when the leader is offline, too slow to produce a block within the time window, or unable to reach other validators. Skipped slots do not increment block height and contribute to a validator's skip rate metric.

Open term

Commonly confused with

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Networkscheduler

Scheduler

The component within Solana's TPU pipeline responsible for ordering transactions from the banking stage's queues, acquiring account read/write locks, and dispatching transactions to worker threads for execution. The scheduler enforces account conflict serialization (ensuring write-locked accounts are processed by only one thread at a time) while maximizing parallelism across non-conflicting transactions. Solana has iterated on scheduler designs (including the central scheduler introduced in 2024) to improve throughput and reduce lock contention under load.

Open term

Related terms

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Core Protocolvalidator

Validator

A node that participates in the Solana network by validating transactions, voting on blocks, and (when selected as leader) producing new blocks. Validators run the Agave, Firedancer, or Jito client software, require significant hardware (128+ GB RAM, high-core CPU, NVMe SSD), and earn rewards from inflation and transaction fees.

Open term

Core Protocolstake

Stake

SOL tokens that are delegated to a validator to increase its voting weight and earn staking rewards. Staking is non-custodial—stakers retain ownership of their SOL. Stake activates/deactivates at epoch boundaries with a warmup/cooldown period. Validators with more stake are assigned more leader slots and have proportionally more influence in consensus.

Open term

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Network

Mainnet Beta

Solana's primary production cluster where real SOL and real economic activity occur; the "beta" designation reflects the network's ongoing protocol development despite being fully live since March 2020. It uses the same architecture as other clusters but with real validator stakes, live staking rewards, and permanent on-chain state. All production dApps, tokens, and NFTs exist on Mainnet Beta.

Open term

Network

Devnet

A persistent public Solana cluster intended for application development and testing, running the same software version as Mainnet Beta but with no real economic value. Devnet SOL can be freely airdropped via the CLI or faucet APIs, and the ledger may be reset periodically by Solana Labs. Developers use Devnet to test programs and integrations before deploying to Mainnet Beta.

Open term

Network

Testnet

A public Solana cluster used primarily by the Solana core team and validators to test new software releases, performance benchmarks, and network upgrades under real network conditions before they reach Mainnet Beta. Testnet SOL has no monetary value, and the ledger is reset more frequently than Devnet; it is less suitable for application development and more suited for validator operators validating their infrastructure.

Open term

Network

TPS (Transactions Per Second)

The rate at which a Solana cluster processes and commits transactions; Solana's theoretical maximum exceeds 65,000 TPS due to its parallel execution model, though real-world sustained throughput on Mainnet Beta typically ranges from 2,000–5,000 non-vote TPS under normal load. Vote transactions (used for consensus) make up a significant portion of all on-chain activity and are counted separately. High TPS is enabled by Proof of History timestamps, Sealevel parallel execution, and Gulf Stream mempool-less forwarding.

Open term