Re: [Iometer-user] throughput results on 100Mb

[Daniel S. <dan...@ed...>]

Hi Will,

I agree with Ming, such a peak throughput should be possible.

Some time I did some tests with a small TCP/IP throughput
measurement tool [1] using poor home equipment (a Athlon
1.4 GHz box with RTL8139 network card running Debian as
server, a 800 MHz laptop with Windows 2000 running the
client via Cygwin). I reached 11.18 MB/sec throughput.

So given your equipment (strong CPU's in the client and a
NetApp filer as server - this box do commit your writes
immediately after putting the data in the NVRAM based write
cache), the measured peak should be possible - even when
having the additional iSCSI overhead.

Daniel

[1] = http://www.scheibli.com/v3/projects/stackthru/index.html



Ming Zhang said:
> it is possible to get a 11.5MB from a 100Mbit network. Do not worry
> about this. Just like people get 117MB/s from a 1Gbit network. If you
> do duplex, u get more.
>
>
> Ming
>
> On Thu, 2004-10-28 at 17:41, Will wrote:
>> Hi. I am a new IOmeter user and I have come across some interesting
>> results. I used IOmeter to test an iSCSI drive on a Network Appliance
>> F87 from a single Ethernet client. This was done over a 100Mb link.
>> The throughput results peaked at 11.5MB/s, which from my understanding
>> is more than is possible/likely for the line speed. Is this expected
>> behavior? Is data other than network traffic is included in this
>> measurement? Thanks in advance for any insights.
>>
>> -=wh=-
>>
>> IOmeter 12.16.03
>> Dual CPU Xeon 3.06 client, 4G RAM.
>> IOmeter configured for 64K reads from six disk workers at once.
>> Bumped the number of outstanding I/O per target to 16.
>>
>>
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