Date: Wed, 3 Dec 2025 08:10:50 +0100 From: Gerrit =?UTF-8?B?S8O8aG4=?= <gerrit.kuehn@aei.mpg.de> To: freebsd-fs@freebsd.org Subject: Re: zpool setup clarification Message-ID: <20251203081050.1a2880af@arc.aei.uni-hannover.de> In-Reply-To: <CANCZdfrxz-swKF5HN_8cZO1A4qmY_x1a1Su2BxAAOQ7JLo6EtQ@mail.gmail.com> References: <aSxnG-HKDYZ0L3lQ@int21h> <b4b75e5e-071c-446f-8298-25f41a609334@app.fastmail.com> <aS8TWJKWqSGeAmo3@int21h> <CANCZdfrxz-swKF5HN_8cZO1A4qmY_x1a1Su2BxAAOQ7JLo6EtQ@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
[-- Attachment #1 --]
Am Tue, 2 Dec 2025 17:32:54 -0700
schrieb Warner Losh <imp@bsdimp.com>:
> I always 1MB align partitions, and put the first one with ZFS at a 1MB
> boundary. Though some really large NVMe drives making this 16MB might not
> be bad for performance.
Same here:
storage3:~ # gpart show da0
=> 40 42970644400 da0 GPT (20T)
40 2008 - free - (1.0M)
2048 42970640384 1 freebsd-zfs (20T)
42970642432 2008 - free - (1.0M)
This is still HDD, but I set up SSDs in pretty much the same way. Usually
it is hard to get information on the internal magic (erase block size
etc.) of SSDs. In the end, we usually struggle more from write patterns we
often see here that only change a few bytes in many (several 10k) files
every few minutes, leading to heavy write amplification.
cu
Gerrit
[-- Attachment #2 --]
0 *H
010
`He 0 *H
0200
*H
0{1 0 UGB10U Greater Manchester10U Salford10U
Comodo CA Limited1!0 U AAA Certificate Services0
040101000000Z
281231235959Z0{1 0 UGB10U Greater Manchester10U Salford10U
Comodo CA Limited1!0 U AAA Certificate Services0"0
*H
0
@nv MEDFȃ* ]P1 p"I-Tc̶nhF SL$rNT
z3`ډU"XOhF'v5,^deHav PfxbV1 8'2Xok+c_s8x6Qx:B /I-߬tMG)b&{>%ݝ5h Ä
^/ 00 U
#>)00U 0U 00{U t0r08642http://crl.comodoca.com/AAACertificateServices.crl06420http://crl.comodo.net/AAACertificateServices.crl0
*H
V{DO X̦Ihv]`֍PO&N氥tTAOZ``J¿Ĺt-}kF/j4,}Z
/\:l7U S@lXen<ZƞYH0!el!s7Χ,,&"`^tԢShnlhV+8: k-?cb,j AP96n00i9rD:"Ql150
*H
0{1 0 UGB10U Greater Manchester10U Salford10U
Comodo CA Limited1!0 U AAA Certificate Services0
190312000000Z
281231235959Z01 0 UUS10U
New Jersey10U Jersey City1 0 U
The USERTRUST Network1.0,U%USERTrust RSA Certification Authority0"0
*H
0
e6ЬW
v'LPa M -d Ή=ӱ{7(+G9Ƽ:_}cBv;+o >tbdj"<{ QgFQˆT?3~lQ5frg!fԛxP:ܼL5 WZ=,T:ML\ ="4~;hfDNFS3`S7sC2S۪tNik` 2̓;Qxg=V i%&k3mnGsC~f)|2cU
T0}7]:l5\AکI bf%̈́?9L|k^̸g[L[s#;- 5Ut IIX6Q&} MC&пA_@DDWP WT>tc/Pe XB.CL%GY &FJPxgW cb_U.\(%9+L ?
R/ 00 U #0
#>)00 U SyZ+JT؛f0U 0U 00U
00U 0CU <0:08642http://crl.comodoca.com/AAACertificateServices.crl04+(0&0$+0http://ocsp.comodoca.com0
*H
Qt!='3.^"our -J~or<C;?\Ʈ{C6|?Cd~}}B+XfvN M2q[A
" ͒7;:E&u?{w;= \9?{
E͓/]YO?QE?Jat#
Ps'DG]*k1jLjxϸvr ב_00Π1p5$VI0
*H
01 0 UUS10U
New Jersey10U Jersey City1 0 U
The USERTRUST Network1.0,U%USERTrust RSA Certification Authority0
200218000000Z
330501235959Z0F1 0 UNL10U
GEANT Vereniging1 0UGEANT Personal CA 40"0
*H
0
J"^'[[52 1@P DʯJa-b3j-Bʖ<p=hxn<0d[Iep^¾r{D$8Uӡ};' Q܌=32 0ѬgGx& 5ꄪi7tbLdjK2@v7 *!즃ɽZD3'6Q_*YR4o>DAt|ز?ui+Pglwi3PeV"JD"<"KښoKv+1u#8!͋G1ߛf"Qi> g%NY.^rax1ym"x~Ti/
]r nY Hϴ,,q5;}&~Wmf*r| :ؖ8ŧjraC3jf|kXo+V)25nE!u;-/
%l>v&L3 (;pogS`Ӹ>/ 00 U #0SyZ+JT؛f0 U i !X
ݧQ0U 0U 0 0 U %0++08U 10/0-U 0%0#+https://sectigo.com/CPS0PU I0G0ECA?http://crl.usertrust.com/USERTrustRSACertificationAuthority.crl0v+j0h0?+03http://crt.usertrust.com/USERTrustRSAAddTrustCA.crt0%+0http://ocsp.usertrust.com0
*H
N{
9 obx?G]tC@ `JϐDW# kz9QҞ,=1t3?S
< 7D5(/Mn7j\y|A̵/k>5 C1C1XEO 4sjq#(61Ym A<K_~4J5Pf7VG li/+5O7f|Pk D!Uk4Odyep@W o[+0k/5֬HM{ْY6G`43d
ԦnV0[<URO\^<ɵ((o w"*u 51]+m0 3ĂVMbFNb@ڱɛ{~␘&jYzptYB
-:Ej#dDݧ/cBtFԼ3=\];62hPj)l/T#6 " 8$2x]si0K03 &V) vQZ0
*H
0F1 0 UNL10U
GEANT Vereniging1 0UGEANT Personal CA 40
230815000000Z
260814235959Z010 U805391G0EU
>Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V.10U Hofgartenstraße 810
UBayern1 0 UDE10U Gerrit Kuehn1&0$ *H
gerrit.kuehn@aei.mpg.de0"0
*H
0
~D-!!&t/ʍDp~ Οr}Vkry{{%E]iZU+;UH88>6iBW(R?cHhc{}'4V>56T~x@eঊRԪo+"ktuK@0&OI%mgl2b60~Y0;cI ;s.
~i7RUPQRC }>BkȻN(Il9@pbNX^El d~ ~¦^t Q
ھV/p&-t )o,l~(5zK 9r%dzeGvGsV+>n8uY`@=eNK]Qx-S~o =eMU R5yѩv S (a{
Qغ`:m}ROgtWVd<O%!V
rL|#_g{g\/REce+ 00 U #0i !X
ݧQ0 U p̴%c? 0U 0 U 0 0 U %0++0?U 80604 +1O0%0#+https://sectigo.com/CPS0BU ;0907531http://GEANT.crl.sectigo.com/GEANTPersonalCA4.crl0x+l0j0=+01http://GEANT.crt.sectigo.com/GEANTPersonalCA4.crt0)+0 http://GEANT.ocsp.sectigo.com0"U 0gerrit.kuehn@aei.mpg.de0
*H
m@{kg/{:gl
JO[X[: F9F&OFM:;_ 9IhuȘXsJ!饈$C5UbW8SF 7 hA =e<0 ALhƺO T(]9 ˌ, 釻] BU1\Fl4m> P1c
o/VE l9YF `xIQjũ%;3,#Ӊ*xŵ~RLEADUYụƗ|(J/yzP%%LBh4f*~
$T 1=]Dnϧ~ѱZ"YU *q*`_@Gֽo
1&X| c?V*36ؖ7=j
lY .|8$7ZEϪY|@9D6i IFR/N2n"lȭ9,RFi/ySݷa-Ds п19050[0F1 0 UNL10U
GEANT Vereniging1 0UGEANT Personal CA 4 &V) vQZ0
`He 0 *H
1 *H
0 *H
1
251203071050Z05 *H
1(0&0 `He*0 `He0
*H
0? *H
120Olpd}]tIB<o#zhM:%7 JC0
*H
0g
YR\NhƝ7CJ4$i?Ѵ >wl37 a΄p;xi1H(F[3u;+`0cǓ1%ODOŲ uكUQ5 ߱ḇm5@x,ig_ @PBtgûP_vA;_ϫ郒b
fS;d ^0wa)Nkc(~D[l!iNGC.? Y})ϸ-}yK|wYٵBw4P`A_sTWXot1@CdJ zsͦ].;CdV̥Yo`'A* 赖ba0} E'N5>UzR < OѷPC
Ptf =P;8FY-mσIʢE(8) KY'琢N z+ GnNY69 ~~.揢u; 0GB..\
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20251203081050.1a2880af>