Re: [Iscsitarget-devel] [Iscsitarget-devel]Initiators Send TaskMgt. 5/6 when I use iometer to do stress test

[Henry L. <hen...@gm...>]

On 4/30/06, Henry Liu <hen...@gm...> wrote:
> On 4/30/06, Ming Zhang <mi...@el...> wrote:
> > https://sourceforge.net/tracker/?func=3Ddetail&atid=3D427254&aid=3D1455=
839&group_id=3D40179
> >
> > so seems that this issue is a little tricky.
> >
> > and that report shows that only dynamo on linux will have this issue.
> >
> > On Sun, 2006-04-30 at 00:50 +0800, Henry Liu wrote:
> > > Thank u for your doing it.
> > > If use NULLIO in target having more dynamo to test it.
> > > I've ever test it with 6 and then 4 init having problem. But I have
> > > never do 1 ini test . I would do it tomorrow.
> I have test it and found out initiator still send function 5 to
> target. But IO did not stop , throughput is 3.3 - 5.5MB/s and IOPS is
> 28 - 44. Details see nullio-test.txt and iometer.PNG for IET0.4.11.
> The dmesg command is issued after running 1 hours. I have test
> IET0.4.13 also , It's behavior is same as 0.4.11 , it appeared
> function 5 but IO is not broken. Details see nullio-test-iet0.4.13.txt
> that get after run 10 minutes by dmesg.
It is the fortunate that there was not taskmgt function 6 after function 5.
I think that one or more LUNs have been crashed as aresult there were
some function 5 be sent though these functions couldn't correct the
crashed LUNs. Some issues in code, iSCSI protocol, initiators or SCSI
device driver and some others caused the crashed LUNs I think. But we
should find out if there is bug in IET code causing the result.
>
>
> >
> > no more pc at home.
> >
> > >
> > > Would u like to run dynamo 5 workers in FILEIO type using any block
> > > device in 64KB request size with  128 outstanding? In worst there was
> > > issue with 8 outstanding, But if you set to 128 outstanding there
> > > would be more chance to get the result.
> >
> > i tried this and can not reproduce. i use a LV on top of MD with pure
> > read io. maybe i should try read and write both.
> >
> >
> > >
> > > I have test another iscsi product that have been saled in market. It
> > > will be received function 5 then 6 when I use 3 ini to test it. But
> > > when it received these TM it would send async message request ini
> > > logout and kill all cmnds in queue. Ini accept target request and the=
n
> > > logoff and re login again after logoff and begin normal W/R again.
> > >
> > > I begin suspect it's a issue of MS Initiators. I will test it on
> > > tomorrow on open initiator.
I have not tested open initiator acting as dynamo because I'll be on
my holiday for 4 days. I 'll test it after my vacation.

> > >
> > > On 4/29/06, Ming Zhang <mi...@el...> wrote:
> > > > i tried to reproduce this on my test box but failed.
> > > >
> > > > i use 1 iometer, 10 works, 128 outstanding io. 128KB request size, =
50%
> > > > sequential, 50% r/w. ini is a dell poweredge sc420,
> > > >
> > > > target side i use NULLIO, IntitalR2T yes, immediatedata no, all
> > > > datalength parameter to 8192. so it is a pretty tough parameter. ta=
rget
> > > > is a dual xeon.
> > > >
> > > > i can not reproduce after 20min running.
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
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