I believe the title says it all.
I've looked at java.nio.file.attribute.Attributes and java.nio.file.FileStore, but couldn't find a way to discover the block-size of a disk-file.
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28answers:
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A:
Here is an article on buffer size vs I/O throughput. Synopsis: nio handles all of that for you. This SO post concludes you should use a power of 2.
Devon_C_Miller
2010-10-08 17:07:11
Devon, I want a way to determine the block size programmatically that doesn't rely on conducting an experiment and interpreting the results.
Steve Emmerson
2010-10-10 19:02:21
I understand that. However, there is no mechanism in Java that exposes the fielsystem's preferred IO size. Given that, the best fall back position is to use a likely multiple and trust the io/nio subsystem to do the right thing. Generally speaking, filesystems use I/O sizes of 4K, 8K, or 16K. So, using one of those sizes will generally be sufficient.
Devon_C_Miller
2010-10-11 13:41:10