Date: Fri, 09 Aug 2019 13:23:02 +0000 From: bugzilla-noreply@freebsd.org To: fs@FreeBSD.org Subject: [Bug 237807] ZFS: ZVOL writes fast, ZVOL reads abysmal... Message-ID: <bug-237807-3630-0FjckSX4Yk@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-237807-3630@https.bugs.freebsd.org/bugzilla/> References: <bug-237807-3630@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D237807 --- Comment #11 from Nils Beyer <nbe@renzel.net> --- increasing concurrency doesn't help: ---------------------------------------------------------------------------= ----- Version 1.97 ------Sequential Output------ --Sequential Input- --Ran= dom- Concurrency 16 -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --See= ks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec= %CP veeambackups 64G 156 99 496023 58 117847 21 5 8 40116 8 942.0 = 17 Latency 54528us 315ms 293ms 1579ms 81741us 74544= us Version 1.97 ------Sequential Create------ --------Random Create----= ---- veeambackups -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec= %CP 16 +++++ +++ +++++ +++ 16878 56 +++++ +++ +++++ +++ 31661= 99 Latency 2501us 43us 423ms 2225us 38us 91= us 1.97,1.97,veeambackups,16,1565363711,64G,,156,99,496023,58,117847,21,5,8,40= 116,8,942.0,17,16,,,,,+++++,+++,+++++,+++,16878,56,+++++,+++,+++++,+++,3166= 1,99,54528us,315ms,293ms,1579ms,81741us,74544us,2501us,43us,423ms,2225us,38= us,91us ---------------------------------------------------------------------------= ----- --=20 You are receiving this mail because: You are the assignee for the bug.=
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