Date: Thu, 21 Feb 2019 14:57:44 +0000 From: bugzilla-noreply@freebsd.org To: fs@FreeBSD.org Subject: [Bug 230260] [FUSE] [PERFORMANCE]: Performance issue (I/O block size) Message-ID: <bug-230260-3630-mikdqtVnZW@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-230260-3630@https.bugs.freebsd.org/bugzilla/> References: <bug-230260-3630@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D230260 --- Comment #14 from Kenneth D. Merry <ken@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=3D(512*1024) options MAXPHYS=3D(1024*1056) Could you merge this to stable/12? This will likely break LTFS for most pe= ople 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. --=20 You are receiving this mail because: You are the assignee for the bug.=
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