ZFS on top of GELI / Intel Atom 330 system

[Ulrich Spörlein]

On Fri, 29.05.2009 at 12:47:38 +0200, Morgan Wesström wrote:
> You can benchmark the encryption subsytem only, like this:
> 
> # kldload geom_zero
> # geli onetime -s 4096 -l 256 gzero
> # sysctl kern.geom.zero.clear=0
> # dd if=/dev/gzero.eli of=/dev/null bs=1M count=512
> 
> 512+0 records in
> 512+0 records out
> 536870912 bytes transferred in 11.861871 secs (45260222 bytes/sec)
> 
> The benchmark will use 256-bit AES and the numbers are from my Core2 Duo
> Celeron E1200 1,6GHz. My old trusty Pentium III 933MHz performs at
> 13MB/s on that test. Both machines are recompiled with CPUTYPE=core2 and
> CPUTYPE=pentium3 respectively but unfortunately I have no benchmarks on
> how they perform without the CPU optimizations.

Hi Morgan,

thanks for the nice benchmarking trick. I tried this on two ~7.2
systems:

CPU: Intel Pentium III (996.77-MHz 686-class CPU)
-> 14.3MB/s

CPU: Intel(R) Pentium(R) 4 CPU 2.80GHz (2793.01-MHz 686-class CPU)
-> 47.5MB/s

Reading a big file from the pool of this P4 results in 27.6MB/s netto
transfer rate (single 7200 rpm SATA disk).

I would be *very* interested in numbers from the dual core Atom, both
with 2 CPUs and with 1 active core only. I think that having dual core
is a must for this setup, so you can use 2 GELI threads and have the ZFS
threads on top of that to spread the load.

Cheers,
Ulrich Spörlein
-- 
http://www.dubistterrorist.de/