[Samba] ODP: Primary DC migration / upgrade

Rowland Penny rpenny at samba.org
Wed Dec 8 15:32:04 UTC 2021

On Wed, 2021-12-08 at 15:25 +0100, Norbert Hanke via samba wrote:
> Hi,
> I/O on the Rapberry Pi is as bad or good as the SD card used for
> storage. Look here for useful benchmarks: 
> https://pibenchmarks.com/fastsd/ .
> With the RPi 3 you can expect approx. 8 MB/s random read and 4 MB/s
> random write with SanDisk SD cards; with the RPi 4 it's around 11
> MB/s
> random read and 5 MB/s random write with Kingston SD cards.
> That's "terrible" compared to a contemporary SSD but for a Domain
> Controller with no too many users it works fine.
> You can speed up the RPi 4 by having an SSD on its USB 3 port...
> makes
> it 10 times as fast, you could even boot from it but the latter is
> sometimes tricky to make it work.

Which is why I use an ssd on one of my rpi DC's and spinning rust on
the other. Setting up the ssd is a bit like setting up a Unix domain
member, it is easy when you get the hang of it :-)


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