Date: Mon, 25 Nov 2013 18:35:10 -0000 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Steven Hartland" <killing@multiplay.co.uk>, "Eric Browning" <ericbrowning@skaggscatholiccenter.org> Cc: FreeBSD FS <freebsd-fs@freebsd.org> Subject: Re: Performance difference between UFS and ZFS with NFS Message-ID: <F1C5007B61404180A44CA5719C859EDE@multiplay.co.uk> References: <2103733116.16923158.1384866769683.JavaMail.root@uoguelph.ca><9F76D61C-EFEB-44B3-9717-D0795789832D@gmail.com><CAM=5oeAF2gfccrGNdbApUDpqRae4OQjZ7oaZZi4y1j%2BsF6PsTw@mail.gmail.com><5969250F-0987-4304-BB95-52C7BAE8D84D@gmail.com><CAM=5oeBmCAq9unFGC2CBoJ3rZMm9MtDw1DWkFpo2ZqQtx3G%2B=Q@mail.gmail.com><18391B9C-2FC4-427B-A4B6-1739B3C17498@gmail.com><CAM=5oeAXiRn2aHvNPuZRPFJp6G45OqdQEDsz2_xGobCUHJp_VQ@mail.gmail.com><CAM=5oeAybYZsn-TQTvfYO3Kx-chZULeYUEhg9fRMi-CFX0aYBA@mail.gmail.com><B7C29F362A5045B48BF4CE223E7CE0AD@multiplay.co.uk><CALfReyfDWTsgXf8JX-eNYOTFdkcYovUf0q=zGQPDUsEUi4nqbw@mail.gmail.com> <CAM=5oeAPG0Vfa-fT1t=Vc8FS_jJGBiR=yq0wuUmEZYLYB%2Br7RA@mail.gmail.com> <DD94A3B19E23453189D4A0C5AB58618A@multiplay.co.uk>
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Just tried this here and I'm seeing CPU saturation from dd, is this
your case too?
Switching to:
/usr/bin/time -h dd if=/dev/zero of=/home/smh/testfile bs=1m count=2930
Iit changed from:
3072000000 bytes transferred in 170.102366 secs (18059714 bytes/sec)
2m50.48s real 1.05s user 2m48.28s sys
to:
3072327680 bytes transferred in 14.094856 secs (217975102 bytes/sec)
15.19s real 0.00s user 4.87s sys
Regards
Steve
----- Original Message -----
From: "Steven Hartland" <killing@multiplay.co.uk>
To: "Eric Browning" <ericbrowning@skaggscatholiccenter.org>
Cc: "FreeBSD FS" <freebsd-fs@freebsd.org>
Sent: Monday, November 25, 2013 6:20 PM
Subject: Re: Performance difference between UFS and ZFS with NFS
> And whats your ZFS pool layout and ashift?
>
> Regards
> Steve
> ----- Original Message -----
> From: "Eric Browning" <ericbrowning@skaggscatholiccenter.org>
>
>
>>I am using /dev/zero
>>
>> /usr/bin/time -h dd if=/dev/zero of=sometestfile bs=1024 count=3000000
>>
>>
>> On Sun, Nov 24, 2013 at 12:31 PM, krad <kraduk@gmail.com> wrote:
>>
>>> I was thinking the same, if it was using /dev/zero as an input any
>>> compression would skew the results a little.
>>>
>>>
>>> On 24 November 2013 15:15, Steven Hartland <killing@multiplay.co.uk>wrote:
>>>
>>>> ----- Original Message ----- From: "Eric Browning"
>>>>
>>>>
>>>>
>>>> On a side note I forgot that I had used dd to test the disk performance a
>>>>> while ago when I was using ZFS.
>>>>>
>>>>> ZFS performance:
>>>>> 3072000000 bytes transferred in 34.167480 secs (89910055 bytes/sec)
>>>>> 34.17s real 0.61s user 31.89s sys
>>>>>
>>>>> UFS performance:
>>>>> 3072000000 bytes transferred in 11.848883 secs (259264942 bytes/sec)
>>>>> 11.85s real 0.58s user 11.25s sys
>>>>>
>>>>> Again, even with dd performance is about 3x faster with UFS with the same
>>>>> disks.
>>>>>
>>>>
>>>> Interesting, what was you command exactly?
>>>>
>>>> Regards
>>>> Steve
>>>>
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>>>
>>>
>>
>>
>> --
>> Eric Browning
>> Systems Administrator
>> 801-984-7623
>>
>> Skaggs Catholic Center
>> Juan Diego Catholic High School
>> Saint John the Baptist Middle
>> Saint John the Baptist Elementary
>>
>
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