Performance statistics ZFS/UFS

S

singhsukhwinder

Hi
I have 3 FreeBSD systems installed in my office on normal PC as per detail given below. The load on these systems is very low, I'm running the command
# dd if=/dev/random of=test_file.dat bs=1M count=500
on all these and result is given bellow:

  1. CPU: Intel(R) Pentium(R) 4 CPU 2.00GHz (2004.59-MHz 686-class CPU), RAM 256MB, Running FreeBSD 9.0 i386, UFS.(Being used as router 3 LAN cards, Load very Very Less ~0) Above Command gave output:
    Code: 
    500+0 records in
500+0 records out
524288000 bytes transferred in 22.295424 secs (23515498 bytes/sec)

  2. CPU: Intel(R) Pentium(R) 4 CPU 3.20GHz (3194.11-MHz K8-class CPU), RAM 512MB, Running FreeBSD 8.3 AMD64, UFS, Being used for CACTI (SNMP Server, Load Very Very Less ~0) Above Command Gave Output:
    Code: 
    500+0 records in
500+0 records out
524288000 bytes transferred in 12.868537 secs (40741850 bytes/sec)

  3. CPU: Intel(R) Pentium(R) D CPU 2.80GHz (2793.25-MHz K8-class CPU) (Dual Core), RAM 2.5GB, Running FreeBSD 9.0 AMD 64, ZFS(500GB+500GB , mirror). (To be used as Apache/MySQL/PHP server, packages installed but still no database added, load ~0)Above Command Gave Output:
    Code: 
    500+0 records in
500+0 records out
524288000 bytes transferred in 12.603047 secs (41600099 bytes/sec)

I want to know, does my ZFS installation is giving adequate performance? Is this right method to test the performance. Should I deploy my ZFS setup for moderate load web server? I have not done any ZFS tuning yet, thinking to disable atime.

Kindly give your valuable suggestion.

PS: I can upgrade the RAM to 4GB for ZFS, if required.

Thanks & Regards
 
The performance difference between the second and the third system is within the range of errors in measurement. Also, you should consider non-sequencial (aka random) access performance which is more of a bottleneck and also more representive for MySQL than dd's sequencial one; and benchmark the ZFS performance against the UFS performance on the same system.
 
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