On Thu, Jul 04, 2019 at 09:39:18AM +0200, Roberto Ragusa (mail@xxxxxxxxxxxxxxxx) wrote:
> On 7/4/19 8:43 AM, Jobst Schmalenbach wrote:
> >Clearly the development server is hardware wise way below the specs of the Dell but
> >software wise they are identical (they get upgraded at the same time).
> As a first step, you have to test subsystems one by one.
Thank you for the tips.
Here are the results (DELL is faster overall):
> time dd 2>/dev/null if=/dev/zero of=/dev/null bs=1 count=1000000
[DIY ~] #>time dd 2>/dev/null if=/dev/zero of=/dev/null bs=1 count=1000000
real 0m1.931s
user 0m1.022s
sys 0m0.896s
[DELL ~] #>time dd 2>/dev/null if=/dev/zero of=/dev/null bs=1 count=1000000
real 0m1.308s
user 0m0.389s
sys 0m0.919s
Dell faster overall
> cd /a/directory/on/the/filesystem/you/want/to/test
> time bash -c "for((i=0;i<1000;i++)); do dd 2>/dev/null if=/dev/zero of=test bs=1 count=1 conv=fsync;done"
> rm test
[DIY /mnt] #>time bash -c "for((i=0;i<1000;i++)); do dd 2>/dev/null if=/dev/zero of=test bs=1 count=1 conv=fsync;done"
real 1m12.944s
user 0m1.604s
sys 0m2.595s
[DELL /mnt] #>time bash -c "for((i=0;i<1000;i++)); do dd 2>/dev/null if=/dev/zero of=test bs=1 count=1 conv=fsync;done"
real 0m2.270s
user 0m0.509s
sys 0m1.475s
Expected the DIY to be slower here, it's running MDADM RAID1 on Seagete Spinners compared to LSI RAID1 SSD
The result shows the DELL overall is faster, back to the drawing board after I followed all the other hints in this thread.
Jobst
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