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I was reading about how you can use the java nio library to take advantage of file transfer/buffering at the O/S level which is called 'zero copy'.
What are the differences in how you create/write to files then? Are there any drawbacks to using zero-copy?
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"Zero-copy" describes computer operations in which the CPU does not perform the task of copying data from one memory area to another or in which unnecessary data copies are avoided.
The concept of copying data from one peripheral to another peripheral by kernel, without switching back to user-process is termed as zero copy. As you may know, kernels offer system calls for user-space processes to interact with hardware or to get things done from the kernel.
zero copy means that your program will not transfer the data from the kernel space to the user space and so on. this is faster nice article can be found here: http://www.ibm.com/developerworks/library/j-zerocopy/
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