Date: Wed, 08 Jul 2015 08:58:20 -0500 From: Karl Denninger <karl@denninger.net> To: freebsd-fs@freebsd.org Subject: Re: Speeding up resilvering Message-ID: <559D2C7C.6060201@denninger.net> In-Reply-To: <559D2AB6.5070007@FreeBSD.org> References: <559D2AB6.5070007@FreeBSD.org>
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[-- Attachment #1 --] On 7/8/2015 08:50, Matthew Seaman wrote: > Hi, > > I've a zpool which is taking an inordinately long time to resilver and > replace a device. It had only got to about 8% completion after a day, > implying over a week to resilver about 6TB data. > > Now, I've applied the resilver performance tuning sysctls from > https://wiki.freebsd.org/ZFSTuningGuide: > > vfs.zfs.scrub_delay=0 > vfs.zfs.top_maxinflight=128 > vfs.zfs.resilver_min_time_ms=5000 > vfs.zfs.resilver_delay=0 > > but it doesn't seem to have made a great deal of difference. Most of > the benefit there would apparently come from reducing scrub_delay or > resilver_delay -- but this system is only booted to single user mode, so > the drives are otherwise idle and the resilver should have automatically > switched to running full throttle anyhow. > > Given the machine is not going to be doing anything else other than > resilvering for the time being, is there any more aggressive tuning or > tricks to get it to go faster that people would recommend? > > Cheers, > > Matthew > What OS version? -- Karl Denninger karl@denninger.net <mailto:karl@denninger.net> /The Market Ticker/ /[S/MIME encrypted email preferred]/ [-- Attachment #2 --] 0 *H 01 0 + 0 *H _0[0C)0 *H 01 0 UUS10UFlorida10U Niceville10U Cuda Systems LLC1 0UCuda Systems LLC CA1"0 *H Cuda Systems LLC CA0 150421022159Z 200419022159Z0Z1 0 UUS10UFlorida10U Cuda Systems LLC1 0 UKarl Denninger (OCSP)0"0 *H 0 X@vkY Tq/vE]5#֯MX \8LJ/V?5Da+ sJc*/r{ȼnS+ w")ąZ^DtdCOZ ~7Q '@a#ijc۴oZdB&!Ӝ-< ? HN5y 5}F|e f"V لio74zn">a1qWuɖbFeGE&3(KhixG3!#e_XƬ Ϝ/,$+;4y 'Bz<qT9_?rRUpn5 Jn&Rx/p Jyel*pN8/#9u/YP EC)TY>~/˘N[vyiDKˉ ,^" ?$T8 v& K%z8C @?K{9f`+@,| Mbia 007++0)0'+0http://cudasystems.net:88880 U 0 0 `HB0 U 0, `HB OpenSSL Generated Certificate0 U -h\Ff Y0 U #0$q}ݽʒm50 U 0karl@denninger.net0 *H Owbabɺx&Uk[ (Oj!%p MQ0I!#QH}.>~2&D}<wm_>V6 v ]f>=Nn+8;q wfΰ/RLyUG#b}n!Dր _up|_ǰc/%ۥ nN8:d;-UJd/m1~VނיnN I˾$tF1&}|?q?\đXԑ&\4V<lKۮ3%Am_(q -(cAeGX)f}-˥6cv~Kg8m~v ;|9:-iAPқ6ېn-.)<[$KJtt/L4ᖣ^Cmu4vb{+BG$M0c\[MR|0FԸP&78"4p# }D Z9;V9#>Sw"[UP710001 0 UUS10UFlorida10U Niceville10U Cuda Systems LLC1 0UCuda Systems LLC CA1"0 *H Cuda Systems LLC CA)0 + !0 *H 1 *H 0 *H 1 150708135820Z0# *H 1T1 De/pG;0l *H 1_0]0 `He*0 `He0 *H 0*H 0 *H @0+0 *H (0 +71001 0 UUS10UFlorida10U Niceville10U Cuda Systems LLC1 0UCuda Systems LLC CA1"0 *H Cuda Systems LLC CA)0 *H 101 0 UUS10UFlorida10U Niceville10U Cuda Systems LLC1 0UCuda Systems LLC CA1"0 *H Cuda Systems LLC CA)0 *H |z]QQR(ֻJmK銡qAT\|JmAzM,ՐTAI*9HGJ=d\d]ze|??l$C(I|ΚQ56F]^$@>ptY~EG'B%C$7K+Zi"mW ݖ82Z3F b?&4 4{Un[>Zv4c _72o9H> Se~3 Bӯ;Mۦl lC O2ۗ o\ߝ6/s~[wSț NvO]A)iS9+aM,+ԢE0'TX Fb*jHw'lkXZ<\ C`f.BT&rC8ecw3i>F!^uaZ wbʃaԔ^WfYWB, ϒ <pNWI|;/W-Hvh
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