Re: NetBSD/Xen samba performance low (compared to NetBSD/amd64)

[Mike Pumford <mpumford%mudcovered.org.uk@localhost>]

On 04/08/2020 05:08, Matthias Petermann wrote:

> But there is one detail I have just now become aware of... when I bought 
> these NUCs a few years ago, I installed hybrid hard disks (Seagate 
> Firecuda SSHD 2TB). This type has a mechanical/magnetic mass storage and 
> a (relatively small) SSD on the side. But from the point of view of the 
We had a batch of office laptop with drives like this (although older 
and smaller) and they have some awful performance quirks if you do a lot 
of IO that effectively downgraded the performance to that of a standard 
2.5in drive and sometimes even slower.

Just done some read performance tests on my samba server here. This is 
all on gigabit ethernet and using the transfer speed reported by windows 
explorer:

Read performance from SATA SSD(<Samsung SSD 860 EVO 1TB>):
70MB/s

Read performance from SATA HD(2x<ST4000DM004-2CV104> raidframe raid1):
Started at 50MB/s rose to 70MB/s by the end of the transfer.

CPU is:
Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz

and the SATA controllers have max link speed of 3Gb. Ethernet controller is:
Intel i82541PI 1000BASE-T Ethernet

So this gives you something non-xen to compare to.

Mike