什么情况导致东京内阁

Question

我使用的是Tokyo Cabinet和python中的tc模块。我以TDB格式存储数据。我希望表只在写入期间阻塞。不幸的是，我看到当文件以“writer模式”打开时，其他进程无法从中读取。这是标准行为、包装器问题还是我做错了什么？或者可能有其他的情况下，行动受阻？在

Answer 1

根据specification：

Tokyo Cabinet provides two modes to connect to a database: "reader" and "writer". A reader can perform retrieving but neither storing nor deleting. A writer can perform all access methods. Exclusion control between processes is performed when connecting to a database by file locking. While a writer is connected to a database, neither readers nor writers can be connected. While a reader is connected to a database, other readers can be connect, but writers can not. According to this mechanism, data consistency is guaranteed with simultaneous connections in multitasking environment.

您可以为每个写操作创建并关闭writer，或者使用Tokyo Tyrant来提供并发访问。在