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3.6 KiB
id | title |
---|---|
caching | Estratégias de Cashing |
Verdaccio armazena todos os pacotes por padrão na pasta /storage
. Mas você pode decidir se quer seguir uma estratégia diferente. Usando plugins você pode usar a nuvem ou qualquer tipo de banco de dados.
Possibilidades de Cache
- A criação de um projeto Node.js em servidores de Integração Contínua (Bamboo, GitLab, Jenkins, etc.) é uma atividade que pode ser executada várias vezes ao dia, portanto, o servidor fará o download do registro de um grande número de tarballs sempre que isso ocorrer. Como de costume, as ferramentas de IC limpam o cache após cada compilação e o processo é iniciado repetidamente. Isto é um desperdício de bandwidth e reduz o tráfego externo. Você pode usar o Verdaccio para fazer cache de tarballs e metadados em nossa rede interna e dar um impulso em seu tempo de compilação.
- Latência e Conectividade, nem todos os países desfrutam de uma conexão de alta velocidade. Neste caso, armazenar pacotes localmente em sua rede é muito útil. Mesmo se você estiver viajando, ou tiver uma conexão fraca, estiver em roaming ou enfrentando países com firewalls fortes que possam afetar a experiência do usuário (por exemplo: corrompendo tarballs).
- Modo Offline, todos os Node Package Managers hoje em dia usam seu próprio cache interno, mas é comum que projetos diferentes usem ferramentas diferentes, o que implica arquivos de bloqueio e assim por diante. Essas ferramentas não podem compartilhar o cache, a única solução é centralizada e depende de um registro de proxy. Verdaccio armazena em cache todos os metadados e tarballs são baixadas por demanda, sendo capaz de compartilhá-los em todo o seu projeto.
- Evita que qualquer registro remoto retorne repentinamente erros de HTTP 404 para tarballs que estavam previamente disponíveis, também conhecido como (left-pad issue).
Estratégias para construções mais rápidas
Estamos à procura de mais estratégias, sinta-se à vontade para compartilhar sua experiência neste campo
Evite armazenar tarballs
Se você tiver um espaço de armazenamento limitado, pode ser necessário evitar tarballs de cache, ativar o cache
false em cada uplink armazenará apenas os arquivos de metadados.
uplinks:
npmjs:
url: https://registry.npmjs.org/
cache: false
Estendendo o Tempo de Expiração do Cache
O Verdaccio, por padrão, aguarda 2 minutos para invalidar os metadados do cache antes de buscar novas informações do registro remoto.
uplinks:
npmjs:
url: https://registry.npmjs.org/
maxage: 30m
Ao aumentar o valor de maxage
em cada uplink
, o controle remoto será consultado com menos frequência. Esta pode ser uma estratégia válida se você não atualiza as dependências com tanta frequência.
Usando a memória em vez do disco rígido
Às vezes, o armazenamento em cache de pacotes não é uma etapa crítica, em vez de rotear pacotes de diferentes registros e alcançar tempos de construção mais rápidos. Existem dois plugins que evitam a gravação em uma unidade física usando a memória.
npm install -g verdaccio-auth-memory
npm install -g verdaccio-memory
A configuração aparece como a seguir
auth:
auth-memory:
users:
foo:
name: test
password: test
store:
memory:
limit: 1000
Lembre-se, uma vez que o servidor é reiniciado, os dados são perdidos, recomendamos esta configuração nos casos em que você não precisa persistir com a função.