The index structure will give good performance looking up individual packets, but a SACK option can cover arbitrary byte ranges that include multiple packets.
索引结构可以为个别包查找提供良好的性能，但SACK选项可能会覆盖包括多个包在内的任意多的字节数。
If you have the option, use standard library functions to do byte-swapping operations, and standardize on the order in which bytes are stored in your data files; network byte order is the best.
如果可以选择的话，请使用标准库函数来进行字节交换操作，并按照字节在数据文件中存储的顺序进行标准化；网络字节顺序最适合这种工作。
If you encounter a drive with 4096-byte sectors but with an option to use the true sector size, you may want to use it; however, you should be aware of some caveats.
如果您遇到一个带4096字节扇区、但可选择真实扇区大小的驱动，您可能希望使用它；不过，您需要注意一些警告。
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