它们可以提供共享的网络连接。
通过共享存储器连接来完成的开销最低。
The lowest overhead would be through a shared-memory connection.
join只有在所要连接的文件共享某个共同的域时才会工作。
Join works only if the files being joined share a common field.
某个客户机连接到服务器所创建的共享内存区域。
A client can attach the Shared memory region created by the server.
某个客户机连接到服务器所创建的共享内存区域。
A client can attach the Shared memory region created by the server.
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