[stgt] iscsi load generator and benchmark tool

[ronnie sahlberg]

yes,
one login for each thread.


On Wed, Dec 30, 2009 at 8:35 AM, Pasi Kärkkäinen <pasik at iki.fi> wrote:
> On Fri, Sep 25, 2009 at 02:39:59PM +1000, ronnie sahlberg wrote:
>> List,
>>
>> You might find this tool useful.
>> I recently added very simple iscsi support to DBENCH ( http://dbench.samba.org )
>> so that dbench has a minimal iscsi initiator built in.
>>
>> This is sometimes useful since it allows to bypass any iscsi initiator
>> layer, like open-iscsi, on the host and to get full control of exactly
>> what commands will be issued to the target and accurate measures since
>> one can know that the data was served across the network and not from
>> a local cache.
>> It is also useful since it can generate very high loads, much higher
>> than I have been anble to generate by doing i/o through a lun mapped
>> through the built in initiator in linux.
>>
>> Here i am mainly interested in high load for very small i/o sizes. I
>> use 1k i/o size in my tests to be as pathological in my tests as
>> possible. But you can run tests with any i/o size.
>>
>>
>> The basic syntax is :
>>
>> $ ./dbench -B iscsi --loadfile=iscsi.txt --iscsi-lun=1
>> --iscsi-portal=10.0.0.71 --iscsi-port=3260
>> --iscsi-target=iqn.2007-03:mptest --warmup=0 --run-once 1
>>
>> to run the loadfile once and then exit and with 1 client.
>>
>> or
>>
>> $ ./dbench -B iscsi --loadfile=iscsi.txt --iscsi-lun=1
>> --iscsi-portal=10.0.0.71 --iscsi-port=3260
>> --iscsi-target=iqn.2007-03:mptest --warmup=0 --timelimit=5 10
>>
>> to run the loadfile over and over until the time runs out  and using
>> 10 threads of execution.
>>
>
> Will it make 10 logins to the iSCSI target, one login for each thread?
>
> -- Pasi
>
>
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