Mange to find the link, so sorry is not a white paper but is "Solaris ZFS administration guide"
The "General propose" key words, can it refer to OLTP application file system?
Please review this section of the docs, here:
The current recommendation is to match the ZFS file system recordsize to the OLTP applicaton block or recordsize.
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If you already know which is the 'access pattern' to the underlying filesystem, or in other words you know that your application will always perform I/O operations in 'chunks' of a fixed block size, then then it *may* have sense to change (generally reduce) the recordsize.