Date: Thu, 11 Sep 2014 01:32:55 -0500 From: Karl Denninger <karl@denninger.net> To: freebsd-stable@freebsd.org Subject: Re: getting to 4K disk blocks in ZFS Message-ID: <54114217.9040403@denninger.net> In-Reply-To: <54114029.3060507@FreeBSD.org> References: <540FF3C4.6010305@ish.com.au> <54100258.2000505@freebsd.org> <5410F0B4.9040808@ish.com.au> <A0A549F7A4094F519A3660697AB4983F@multiplay.co.uk> <54114029.3060507@FreeBSD.org>
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[-- Attachment #1 --] On 9/11/2014 1:24 AM, Andriy Gapon wrote: > On 11/09/2014 04:22, Steven Hartland wrote: >> ----- Original Message ----- From: "Aristedes Maniatis" <ari@ish.com.au> >>> Should the FreeBSD project change this minimum in the next release? >>> There seems to be no downside and a huge amount of pain for people >>> who stumble along with the defaults not knowing what a mess they are >>> creating to solve later. >> The downside is wasted space which can be significant and hence when >> I last suggested just this it was unfortunately rejected. >> >> We still maintain a local patch to our source tree which does just >> this because, as you've mentioned, we don't want the pain so its >> easier to just run everything as 4k. > > Another downside is 1/4th of uberblocks, 32 vs 128. > Also, automatic sector size detection works great for me and I've never had a > need to manually tweak ashift. > It works great until you start replacing older disks with new, larger ones and find out that the new ones are 4k where the old ones were not..... IMHO at this point in time it's worth considering a 4k default. -- Karl [-- Attachment #2 --] 0 *H 01 0 + 0 *H O0K030 *H 01 0 UUS10UFlorida10U Niceville10U Cuda Systems LLC1 0UCuda Systems LLC CA1/0- *H customer-service@cudasystems.net0 130824190344Z 180823190344Z0[1 0 UUS10UFlorida10UKarl Denninger1!0 *H karl@denninger.net0"0 *H 0 bi՞] MNԿawx?`)'ҴcWgR@BlWh+ u}ApdCF JVй~FOL }EW^bچYp3K& ׂ(R lxڝ.xz?6 &nsJ +1v9 v/( kqĪp[vjcK%fϻe?iq]z lyzFO'ppdX//Lw(3 JI A*S#՟H[f|CGqJKoo y.oEuOw$ /섀$삻J9b|A P~8]D1YI<"""Y^T2iQ2 b yH)] Ƶ0y$ _N 6XqMC 9 XgώjGTP"#nˋ"Bk1 00 U 0 0 `HB0 U 0, `HB OpenSSL Generated Certificate0 U |8 ˴d[20 U #0]Af4 U3x&^"408 `HB+)https://cudasystems.net:11443/revoked.crl0 *H gBwH] j\x`( &gW32"Uf^. ^Iϱ k!DQA g{(w /)\N'[ oRW @C HO>)XrTNɘ!u`xt5(=f\-l3<@C6mnhv##1ŃbH͍_Nq aʷ?rk$^9TIa!kh,D -ct1 0001 0 UUS10UFlorida10U Niceville10U Cuda Systems LLC1 0UCuda Systems LLC CA1/0- *H customer-service@cudasystems.net0 + ;0 *H 1 *H 0 *H 1 140911063255Z0# *H 1AsD_XPL0l *H 1_0]0 `He*0 `He0 *H 0*H 0 *H @0+0 *H (0 +71001 0 UUS10UFlorida10U Niceville10U Cuda Systems LLC1 0UCuda Systems LLC CA1/0- *H customer-service@cudasystems.net0 *H 101 0 UUS10UFlorida10U Niceville10U Cuda Systems LLC1 0UCuda Systems LLC CA1/0- *H customer-service@cudasystems.net0 *H s&X#G fPApp,wFQvjJ>Kg &y ݿӿ˄QrYhsHsº>k/HRLQ#LٱeV2&uS2d0G8Xcp_ɻ tPRo? ½8PzmٲIjvgzIX[$-t2YL:H=Yh!|å=7`>ĕ0 /r[lX}+- @r k". hnq^bS [.Y, FGSb Yα\'EkI-S> ViX,Zf_~<sG>xI+"뷥~}#V^ >- nï5$oe[D Ng ϑ@ E5 щC"1RSG5K6q ]hrJ
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