正确的 fcntl 标志是什么？
当从磁盘读取数据并通过网络写入文件以获得最佳速度时，正确的 fcntl 标志是什么？
也许问题出在文件描述符上设置的 fcntl 标志？
What would be the right fcntl flags when reading from a disk and writing to a file over the network for best speed?
perhaps the issues is with the fcntl flags set on the file descriptor?
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我认为
fcntl不会为您提供任何会影响性能的内容。也许您正在寻找 posix_fadvise ，但我认为主要关键是使用相当大的缓冲区。I don't think
fcntloffers you anything that would affect performance. Perhaps you're looking forposix_fadvise, but I think the main key is just to use reasonably large buffers.我假设您正在使用 NFS（或类似的东西）通过网络读取/写入文件。最好的选择是读/写文件的必要部分。然后，NFS 有更多选项将数据划分为更大尺寸的数据包，从而减少网络堆栈的开销。
I am assuming that you are using NFS (or something like that) to read/write to a file across the network. The best option is to read/write as large as necesssary parts of the file. Then the NFS has more options as to dividing the data up into the larger size packets - hence less overhead in terms of the network stack.