[Openib-windows] Windows SRP multipathing
Andrey Slepuhin
andrey.slepuhin at t-platforms.ru
Mon Dec 25 01:55:29 PST 2006
Dear Alex,
I thought about trying generic MS-provided DSM, but unfortunately I
don't know where to find it - I have no access to Microsoft DDK.
Best regards,
Andrey
Alex Estrin wrote:
> Hi Yossi, Andrey,
>
> Unless supported by OS, multipath DSM drivers provided by storage
> vendors, it is their prerogative.
> So until HP sertified/validated OpenFabric SRP driver I do not see how
> HP MPIO DSM could be used.
>
> With regard to Microsoft there is a working generic DSM included
> in MPIO DDK, that can be used as-is if HBA+storage SPC-3 compliant. I
> think SRP should be just fine. What about storage?
>
> Yossi, did you look at Microsoft DSM code?
> Do you think it is workable alternative to team it with SRP?
>
> Thanks,
> Alex
>
>
>
> ------------------------------------------------------------------------
> *From:* openib-windows-bounces at openib.org on behalf of Andrey Slepuhin
> *Sent:* Sun 12/24/2006 12:58 PM
> *To:* Yossi Leybovich
> *Cc:* openib-windows at openib.org
> *Subject:* Re: [Openib-windows] Windows SRP multipathing
>
> Dear Yossi,
>
> I have one 2-port PCI-X HCA in each of 4 cluster nodes. Different HCA
> ports are connected to two different IB subnets managed by Silverstorm
> InfinIO 5000 switches.
> The switches are connected to different FC controllers on HP MSA1500cs
> storage using IB-FC gateway (Silverstorm VFx module). On the VFx module
> I mapped FC target to both IOCs. If I will map it only to one IOC, I
> will see each logical disc 2 times instead of 4, but there will be two
> SRP miniport drivers in Windows device manager marked by exclamation sign.
> Please note that I have 2 separate subnets. Should I connect the IB
> switches together to have a single subnet?
>
> Regarding the disks: They are writable and they are working fine, but if
> I map a disk to the certain drive letter, this drive will be accessible
> only while the appropriate path is working.
>
> HP storage has 2 active-active controllers, so the host can choose any
> path to access the storage. They have MPIO-based MSD drivers and the
> management software that allows to choose the primary and the failover
> paths, but this software just does not see any array devices if I'm
> using SRP as a SCSI driver. The same for array management utility: I can
> not update the firmware and configure logical volumes on the storage if
> I'm working through SRP driver (I was forced to plug QLogic 2340 HBA
> into one node to do these tasks).
>
> Best regards,
> Andrey
>
>
> Yossi Leybovich wrote:
> > Hi
> >
> > First I build new binaries base on revision 566.
> > I hope we will post it to the web early next week.
> > Note that the build include fix to blue screen when 2 HCA on the same
> > host connected to the same storage.
> >
> > WinIB does support multipath but only between ports of the same HCA.
> > Mean if you connect both ports of the HCA to the storage they will
> > appear as one controller and switch if one port fail.
> >
> > We just now started to look at the MPIO DDK and I hope we will be able
> > to support it.
> >
> > Can you describe the connectivity of your network ?
> > Does the multiple paths is feature in the eHP storage ? Can you disable
> > it ?
> > What is the problem with multiple disks instances ? Cannot you write to
> > the disks ?
> >
> > >From my experience with Enginio storage I just disable their fail over
> > feature and I did not see the multiple disks.
> >
> > I hope that in the coming weeks we will be able to support MPIO.
> > Thakx
> > Yossi
> >
> >
> >
> >
> >> -----Original Message-----
> >> From: openib-windows-bounces at openib.org
> >> [mailto:openib-windows-bounces at openib.org] On Behalf Of
> >> Andrey Slepuhin
> >> Sent: Thursday, December 21, 2006 10:25 PM
> >> To: Tzachi Dar
> >> Cc: openib-windows at openib.org
> >> Subject: Re: [Openib-windows] Windows SRP multipathing
> >>
> >> Currently I'm running build 1.0.0.506.
> >>
> >> Best regards,
> >> Andrey
> >>
> >> Tzachi Dar wrote:
> >>
> >>> What version of openib stack are you using?
> >>> As far as I can tell there have been many changes in this area from
> >>> the last build that openib has made.
> >>> (this means that you will probably have to update your binaries).
> >>>
> >>> Thanks
> >>> Tzachi
> >>>
> >>>
> >>>
> >>>> -----Original Message-----
> >>>> From: openib-windows-bounces at openib.org
> >>>> [mailto:openib-windows-bounces at openib.org] On Behalf Of Andrey
> >>>> Slepuhin
> >>>> Sent: Thursday, December 21, 2006 4:13 PM
> >>>> To: openib-windows at openib.org
> >>>> Subject: [Openib-windows] Windows SRP multipathing
> >>>>
> >>>> Dear folks,
> >>>>
> >>>> We have 4-node cluster system using 2 QLogic (Silverstorm) InfinIO
> >>>> 5000 switches, HP DL385 servers and HP MSA1500cs storage.
> >>>>
> >> The cluster
> >>
> >>>> is working under MS Windows Server 2003 x64. We successfully
> >>>> installed IB stack including SRP drivers, and the logical disks on
> >>>> the storage are visible on the cluster nodes. The problem is that
> >>>> each disk is encountered 4 times due to the multiple
> >>>>
> >> paths. We tried
> >>
> >>>> HP DSM driver for Microsoft MPIO but unfortunately it
> >>>>
> >> doesn't work -
> >>
> >>>> it seems that the driver expects only QLogic and Emulex FC
> >>>>
> >> HBAs. Does
> >>
> >>>> anybody have an experience with IB SRP multipathing on
> >>>>
> >> Windows? Any
> >>
> >>>> help will be much appreciated.
> >>>>
> >>>> Thanks in advance,
> >>>> Andrey Slepuhin,
> >>>> Head of Cluster Solutions Center,
> >>>> T-Platforms
> >>>>
> >>>> http://www.t-platforms.ru/english
> >>>> tel.: +7 495 9565490, +7 495 7440995
> >>>> fax: +7 495 9565415
> >>>> mob.: +7 916 1636117
> >>>>
> >>>>
> >>>> _______________________________________________
> >>>> openib-windows mailing list
> >>>> openib-windows at openib.org
> >>>> http://openib.org/mailman/listinfo/openib-windows
> >>>>
> >>>>
> >>>>
> >> _______________________________________________
> >> openib-windows mailing list
> >> openib-windows at openib.org
> >> http://openib.org/mailman/listinfo/openib-windows
> >>
> >>
>
> _______________________________________________
> openib-windows mailing list
> openib-windows at openib.org
> http://openib.org/mailman/listinfo/openib-windows
>
More information about the ofw
mailing list