Hi David, time is my main constraint. I'm soon going to have none left for evaluating benchmarks. I think a better use of available time would be to start fundraising to get Teres-I boot without micro SD. But then I don't know if the ethical case for that laptop is strong enough compared to other pressing needs of the community. My use case seems minimal and/or unrealistic. Best regards. //Erik
On 22 June 2019 01:00:51 CEST, David Christensen <dpchr...@holgerdanske.com> wrote: >On 6/21/19 12:28 AM, Erik Josefsson wrote: >> Hi David, >> >> On 6/19/19 3:38 AM, David Christensen wrote: >>> >>> The best way to answer your question regarding performance of a size >N >>> SD card vs. a size 2*N SD card is to buy two cards and benchmark >them >>> using your workload. Please publish your findings. >> >> Please find my four (4) findings below or at >> http://paste.debian.net/1088723 >> >> The only benchmark I know how to use is flashbench. But unfortunately >I >> don't know how to interpret the resulting data. >> >> I would be immensely grateful for advise on which of the 4 cards to >use. >> >> The testing was simple. I have downloaded and put the same copy of >the >> redpill RC3 image from http://box.redpill.dk/nonfree/ onto each SD >card, >> then I have followed the instructions. Each card now has an "Extended > >> system" created by the command box-add-gui on the same machine. >> >> Then I have installed aptitude, run update and upgrade and autoclean, > >> and then installed and run flashbench with parameters: flashbench -a >> /dev/mmcblk0 --blocksize=1024 >> >> The four cards are: >> >> 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 >> >> I can send a picture of the cards off list if this is unclear. >> >> So the question is, which card should I use for Teres-I ? >> >> If there are further benchmarks or tests that could help determine >which >> SD card is the best, I'd be happy to run them. >> >> Best regards. >> >> //Erik ><snip> > >I'm not familiar with flashbench. Every tool has a learning curve; >it's >up to you to decide how much effort you want to put into it. > > >When I wrote "benchmark them using your workload", I was thinking >"install Debian, install your apps, run your apps, quantify what you >can". If you're doing command-line stuff, the 'time' built-in for Bash > >can be very useful. But, it's also good to get a subjective feel for >the system on the various media -- does it lag? Does it stutter/ >freeze? Does it crash? > > >I found that Debian and FreeBSD on SanDisk Ultra Fit 16 GB USB 3.0 >flash >drives was "good enough" for headless servers, but stuttered/ froze for > >interactive graphical desktop use (during disk I/O; especially writes). > >I have since migrated to used 16 GB SSD's. (Does your target hardware >have a SATA port?) > > >David -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
