[Bug 230260] [FUSE] [PERFORMANCE]: Performance issue (I/O block size)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230260

--- Comment #14 from Kenneth D. Merry <ken at FreeBSD.org> ---
(In reply to Conrad Meyer from comment #12)

Your changed fixed the problem, thanks!

You are correct that MAXPHYS is larger than the default:

options         DFLTPHYS=(512*1024)
options         MAXPHYS=(1024*1056)

Could you merge this to stable/12?  This will likely break LTFS for most people
using it.

Since tape drives don't do tagged queueing, the common way to get better
performance is to use a larger block size.  LTFS supports up to 1MB block
sizes, and in order to read tapes from other systems and get better
performance, we set MAXPHYS to over 1MB.  (So we can get 1MB I/O regardless of
alignment.)  DFLTPHYS goes along with that.

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