Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?)

From	Jonas Smedegaard <jonas@jones.dk>
Newsgroups	linux.debian.user
Subject	Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?)
Date	2019-06-23 17:10 +0200
Message-ID	<ycchX-8e2-3@gated-at.bofh.it> (permalink)
References	(4 earlier) <ybrsK-59p-13@gated-at.bofh.it> <ybUO6-67K-5@gated-at.bofh.it> <yc3y2-2V7-3@gated-at.bofh.it> <yc4u5-3t9-1@gated-at.bofh.it> <ycb2y-7ij-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

[Multipart message — attachments visible in raw view] - view raw

Quoting Erik Josefsson (2019-06-23 15:42:05)
> On 6/23/19 8:40 AM, Jonas Smedegaard wrote:
> >> If random IO speed most likely is the real bottle neck, do you know 
> >> of any particular brand/label/kind/category of MicroSD card that is 
> >> significantly better than others in that regard?
> > https://github.com/ThomasKaiser/Knowledge/blob/master/articles/A1_and_A2_rated_SD_cards.md
> >
> > (this is perhaps 5th time I share that link with you; 2nd on this 
> > list)
> 
> The article by Thomas Kaiser ends with an open discussion that you can 
> probably just as well buy A1 cards made before 2017.

You call a section labeled "TODO" an open discussion?  Oh well.


> The last card I bought is neither A1 or A2 but marked with a XC II 
> logo. That particular markup is not mentioned in Kaiser's article.

Maybe because the text is about A1/A2 classification, only briefly 
linking to the historic thread covering lesser relevant cards.


> So the article cannot tell me which of my 4 cards is likely to be the 
> best for my usecase:
> 
> MicroSD SanDisk Extreme PRO  64GB  [3]  XC II
> MicroSD SanDisk Extreme PLUS  64GB  [3]  XC I  V30  A2
> MicroSD SanDisk Extreme PLUS  32GB  [3]  HC I  V30  A1
> MicroSD SanDisk Ultra  32GB  [1]  HC I  (10)  A1

The section "'Application Performance Class' to the rescue" didn't help 
tell you about the relevancy of A1/A2 classification?

And subsection "Real world 2018 A1 and A2 performance comparison" didn't 
help tell you about real-world relevancy of A1 versus A2 classification?

Oh well.


> Ahh.. there's another hint! For some applications, disk partition 
> matters?

Explained here (yes, shared a few posts ago as well):

https://wiki.gentoo.org/wiki/SDCard#Solution_2:_Tuned_ext4
https://thelastmaimou.wordpress.com/2013/05/04/magic-soup-ext4-with-ssd-stripes-and-strides/
https://lists.linaro.org/pipermail/flashbench-results/2014-July/000479.html


 - Jonas

-- 
 * Jonas Smedegaard - idealist & Internet-arkitekt
 * Tlf.: +45 40843136  Website: http://dr.jones.dk/

 [x] quote me freely  [ ] ask before reusing  [ ] keep private

Thread

System on a chip - performance relative size and setup (how can the  (Debian) setup make a difference?) Erik Josefsson <erik.hjalmar.josefsson@gmail.com> - 2019-06-18 14:30 +0200
  Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) songbird <songbird@anthive.com> - 2019-06-18 15:10 +0200
  Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?) Jonas Smedegaard <jonas@jones.dk> - 2019-06-18 15:20 +0200
  Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Andy Smith <andy@strugglers.net> - 2019-06-18 15:20 +0200
    Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?) rhkramer@gmail.com - 2019-06-18 16:10 +0200
      Example of an M2 form factor SSD (was: Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?) rhkramer@gmail.com - 2019-06-19 14:30 +0200
        Re: M2 form factor SSD Peter Ehlert <peter@sdi-baja.com> - 2019-06-19 18:10 +0200
    Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Erik Josefsson <erik.hjalmar.josefsson@gmail.com> - 2019-06-18 17:30 +0200
      Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?) rhkramer@gmail.com - 2019-06-18 17:40 +0200
        Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Dan Ritter <dsr@randomstring.org> - 2019-06-18 17:50 +0200
      Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Nicholas Geovanis <nickgeovanis@gmail.com> - 2019-06-18 17:50 +0200
        Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Erik Josefsson <erik.hjalmar.josefsson@gmail.com> - 2019-06-18 18:20 +0200
          Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?) Jonas Smedegaard <jonas@jones.dk> - 2019-06-18 21:10 +0200
            Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Erik Josefsson <erik.hjalmar.josefsson@gmail.com> - 2019-06-18 23:20 +0200
              Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Dan Ritter <dsr@randomstring.org> - 2019-06-19 00:00 +0200
                Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Erik Josefsson <erik.hjalmar.josefsson@gmail.com> - 2019-06-19 12:00 +0200
                Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?) Jonas Smedegaard <jonas@jones.dk> - 2019-06-19 12:30 +0200
                Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?) deloptes <deloptes@gmail.com> - 2019-06-19 12:50 +0200
                Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?) Jonas Smedegaard <jonas@jones.dk> - 2019-06-19 13:20 +0200
                Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Erik Josefsson <erik.hjalmar.josefsson@gmail.com> - 2019-06-19 13:40 +0200
                Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?) Jonas Smedegaard <jonas@jones.dk> - 2019-06-19 14:10 +0200
                Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Erik Josefsson <erik.hjalmar.josefsson@gmail.com> - 2019-06-20 09:00 +0200
                Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?) Jonas Smedegaard <jonas@jones.dk> - 2019-06-20 09:40 +0200
                Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Dan Ritter <dsr@randomstring.org> - 2019-06-19 16:00 +0200
              Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Nicholas Geovanis <nickgeovanis@gmail.com> - 2019-06-19 00:00 +0200
              Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?) Jonas Smedegaard <jonas@jones.dk> - 2019-06-19 01:40 +0200
  Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Jochen Spieker <ml@well-adjusted.de> - 2019-06-18 21:50 +0200
  Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) David Christensen <dpchrist@holgerdanske.com> - 2019-06-19 03:40 +0200
    Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?) Jonas Smedegaard <jonas@jones.dk> - 2019-06-19 04:10 +0200
    Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?) deloptes <deloptes@gmail.com> - 2019-06-19 12:50 +0200
      Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) David Christensen <dpchrist@holgerdanske.com> - 2019-06-20 02:20 +0200
    Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Erik Josefsson <erik.hjalmar.josefsson@gmail.com> - 2019-06-21 09:30 +0200
      Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?) Jonas Smedegaard <jonas@jones.dk> - 2019-06-21 12:20 +0200
        Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Erik Josefsson <erik.hjalmar.josefsson@gmail.com> - 2019-06-21 15:10 +0200
          Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Andy Smith <andy@strugglers.net> - 2019-06-22 22:30 +0200
            Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Erik Josefsson <erik.hjalmar.josefsson@gmail.com> - 2019-06-23 07:50 +0200
              Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?) Jonas Smedegaard <jonas@jones.dk> - 2019-06-23 08:50 +0200
                Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) Erik Josefsson <erik.hjalmar.josefsson@gmail.com> - 2019-06-23 15:50 +0200
                Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?) Jonas Smedegaard <jonas@jones.dk> - 2019-06-23 17:10 +0200
      Re: System on a chip - performance relative size and setup (how can  the (Debian) setup make a difference?) David Christensen <dpchrist@holgerdanske.com> - 2019-06-22 01:10 +0200
        Re: System on a chip - performance relative size and setup (how can the (Debian) setup make a difference?) Erik Josefsson <erik.hjalmar.josefsson@gmail.com> - 2019-06-22 11:50 +0200

csiph-web