On Fri, Feb 16, 2018 at 11:25 PM, linux guy <linuxguy123(a)gmail.com> wrote:
So I finally got back to work on this project. I did installed another
image on the Kingston card and ran dnf update. It took > 8 hours.
On the advice from my friend I purchased a Class 3 SanDisk "Extreme" 32 GB
micro SD card. The packaging claims reads at 90 MB/sec (600x) and writes at
60 MB/sec (400x).
# time dnf update with this card now yields: real 37m8s, user 27m39s sys
4m36s. At least 16x faster. And the current dnf update is larger than
what I was running several weeks ago.
#dnf install rygel takes a 5 minutes instead of over an hour.
Bottom line: the SD card (speed) makes a huge difference in the speed of an
Yes, I tend to use either the Sandisk Extreme or Samsung EVO lines of SD card.
There's also been a big rework of the MMC subsystem that landed in
4.16 that moved to the block MQ kernel infra which should help
performances, and will also enabled the use of HW queues on supported
HW eventually so there should be improvements seen in F-28 for SD card