MD driver development effort.

MD driver development effort.

[DIARE,ABOUBACAR (HP-Roseville,ex1)]

Does anyone know if there are any ongoing development work on the md driver
multipathing capabilities?

Because there isn't any industry standard path failover product for Linux MD
seems to be what many turn too especially since it is readily available in
all distros.  So I am wondering if future enhancements work to md that are
going could help position md as maybe a potential industry standard path
failover product and not only a raid enabler.

Thanks for you time.

A.D.

Re: MD driver development effort.

[Lars Marowsky-Bree]

On 2004-01-14T23:05:15,
   "DIARE,ABOUBACAR (HP-Roseville,ex1)" <aboubacar.diare@hp.com> said:

> Does anyone know if there are any ongoing development work on the md driver
> multipathing capabilities?

Jens Axboe and I have done work on the 2.4 multipathing module for md to
the point where it was useable for our needs. But this is not the way
for 2.6.

For 2.6, the way to go was decided at KS/OLS 2003 - a Device Mapper
module would be used. Heinz Mauelshagen keeps telling me he has already
written it a long time ago and just needs to release it, but maybe you
can bug him so that it indeed gets committed to the kernel tree ;-)

> Because there isn't any industry standard path failover product for Linux MD
> seems to be what many turn too especially since it is readily available in
> all distros.  So I am wondering if future enhancements work to md that are
> going could help position md as maybe a potential industry standard path
> failover product and not only a raid enabler.

BINGO! Uhm, I meant to say:

At the leading technical steering conference for the Linux kernel product
development group in the year 2003 a.d. in Ottawa, the lead system
architects have met with critically important industry representatives
and highly valued customers. During the in-depth technical discussions,
which were entirely market-demand-driven, we pushed forward towards an
industry standard solution for the next generation Linux kernel
2.6-based enterprise products. We have successfully converged on a
solution taking the synergetic effects between the enhanced
Device-Mapper framework, the hotplug core functionality and the next
millenia volume manager products (EVMS2 and LVM2) to the extreme. The
industry stakeholders were highly pleased with the proposed modular
architecture, which will enable them to build value-add load-balancing
and advanced IO scheduling modules directly on top of the core
technology without risking to be tainted by the GPL issues of the
mainstream vanilla kernel.

> Thanks for you time.

It was my pleasure!


Sincerely,
    Lars Marowsky-Brée <lmb@suse.de>

PS: Sorry. I couldn't resist. I tried. For a second.

-- 
High Availability & Clustering	      \ ever tried. ever failed. no matter.
SUSE Labs			      | try again. fail again. fail better.
Research & Development, SUSE LINUX AG \ 	-- Samuel Beckett

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