RE: Q: does DirectIO on windows is supported on file systems ?

> So when you are creating a Database in Windows you can use any
block size.
>But in UNIX/LINUX/SOLARIS you have to consider your FILE SYSTEM BUFFER
CACHE. Say
> your o/s file system buffer cache is 4k, then there is no use to
define the block
> size of 8k, as for any single i/o the o/s has to send the request
twice.

I'm sorry, but this is entirely false. OS blocking factors do not govern the IO transfer sizes. Just not so.

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