Memory optimization where data is shared between readers until a writer modifies it, at which point only the modified portion is copied. Solana's AccountsDB uses copy-on-write semantics — accounts are written to new AppendVec entries rather than modifying in place, enabling snapshot creation without pausing transaction processing.
Comece pela explicação mais curta e útil antes de aprofundar.
Memory optimization where data is shared between readers until a writer modifies it, at which point only the modified portion is copied. Solana's AccountsDB uses copy-on-write semantics — accounts are written to new AppendVec entries rather than modifying in place, enabling snapshot creation without pausing transaction processing.
Use primeiro a analogia curta para raciocinar melhor sobre o termo quando ele aparecer em código, docs ou prompts.
Pense nisso como um bloco de construção que ajuda a ligar uma definição isolada ao sistema maior onde ela vive.
Coloque o termo dentro da camada de Solana em que ele vive para raciocinar melhor sobre ele.
Serialização, memória, estruturas de dados e bases de engenharia.
Transforme o termo de vocabulário em algo operacional para produto e engenharia.
Este termo destrava conceitos adjacentes rapidamente, então funciona melhor quando você o trata como um ponto de conexão, não como definição isolada.
Use este bloco compacto quando quiser dar contexto aterrado para um agente ou assistente sem despejar a página inteira.
Copy-on-Write (copy-on-write) Categoria: Fundamentos de Programação Definição: Memory optimization where data is shared between readers until a writer modifies it, at which point only the modified portion is copied. Solana's AccountsDB uses copy-on-write semantics — accounts are written to new AppendVec entries rather than modifying in place, enabling snapshot creation without pausing transaction processing. Aliases: CoW Relacionados: AccountsDB, AppendVec
Use contexto do glossário, relações entre termos, modelos mentais e builder paths para receber respostas estruturadas em vez de output genérico.
Opcional: cole código Anchor, Solana ou Rust para o Copilot mapear primitivas de volta para termos do glossário.
O Copilot vai responder usando o termo atual, conceitos relacionados, modelos mentais e o grafo ao redor do glossário.
Esses ramos mostram quais conceitos esse termo toca diretamente e o que existe uma camada além deles.
The persistent storage layer for all Solana accounts. AccountsDB stores account data in memory-mapped AppendVec files, indexed by pubkey and slot. It supports fast lookups, handles account deduplication across slots, and periodically cleans up dead accounts. AccountsDB is the largest consumer of validator disk space.
A memory-mapped, append-only file used by AccountsDB to store account data. Each AppendVec corresponds to a specific slot and contains serialized account entries (pubkey, lamports, data, owner, etc.). AppendVecs are immutable once the slot is rooted, enabling efficient snapshotting and cleanup.
Estes são os próximos conceitos que valem abrir se você quiser que este termo faça mais sentido dentro de um workflow real de Solana.
Essas entradas são fáceis de misturar quando você lê rápido, faz prompting em um LLM ou está entrando em uma nova camada de Solana.
A memory access pattern where data is read or manipulated directly from its original buffer location without allocating new memory or copying bytes. In Solana program development, zero-copy is used to access account data in-place from the runtime's memory-mapped byte slice, avoiding expensive heap allocations and Borsh deserialization overhead. Frameworks like Anchor (#[account(zero_copy)]) and Pinocchio use this pattern extensively to minimize compute unit consumption for large accounts.
Entradas de glossário só ficam úteis quando estão conectadas. Esses links são o caminho mais curto para ideias adjacentes.
The persistent storage layer for all Solana accounts. AccountsDB stores account data in memory-mapped AppendVec files, indexed by pubkey and slot. It supports fast lookups, handles account deduplication across slots, and periodically cleans up dead accounts. AccountsDB is the largest consumer of validator disk space.
A memory-mapped, append-only file used by AccountsDB to store account data. Each AppendVec corresponds to a specific slot and contains serialized account entries (pubkey, lamports, data, owner, etc.). AppendVecs are immutable once the slot is rooted, enabling efficient snapshotting and cleanup.
Essas entradas vivem ao lado do termo atual e ajudam a página a parecer parte de um grafo maior, não um beco sem saída.
A systems programming language emphasizing memory safety, zero-cost abstractions, and concurrency without a garbage collector. Rust uses an ownership model with borrow checking at compile time to prevent data races and null pointer bugs. It is the primary language for Solana program development (via Anchor or native solana-program crate) and the Agave validator client.
A statically typed superset of JavaScript that compiles to plain JavaScript. TypeScript adds type annotations, interfaces, generics, and enums to catch errors at compile time. It is the standard language for Solana client-side development—wallet adapters, dApp frontends, test suites, and SDK interactions (web3.js, Anchor client) are typically written in TypeScript.
The ubiquitous scripting language for web development, running in browsers and Node.js. JavaScript is dynamically typed and event-driven. Most Solana dApp frontends and scripts use JavaScript/TypeScript with libraries like @solana/web3.js. Node.js enables server-side JS for backend services, indexers, and bot development.
A JavaScript runtime built on Chrome's V8 engine that enables server-side JavaScript execution. Node.js uses an event-driven, non-blocking I/O model. In the Solana ecosystem, Node.js is used for: running Anchor tests (Mocha/Jest), backend services, transaction bots, indexers, and CLI tools. npm/yarn/pnpm manage JavaScript package dependencies.