[linux-lvm] Working together

[linux-lvm] Working together

[Mark Peloquin]

Hello everyone,

On behalf of the EVMS project (http://sourceforge.net/projects/evms or
http://oss.software.ibm.com/developerworks/opensource/evms) team, we
would like to invite the Linux LVM project to join/collaborate with our
project.  The goal of this collaboration is to offer a complimentary set of
functionality to the Linux community, rather than multiple sets of
functionality
that overlap and compete.

As many of you know, the EVMS project, in design and scope, is meant to
be a total Logical Volume Management solution, including support for the
emulation of other volume management systems.

The EVMS team would like the Linux LVM project team to consider assuming
responsibility for the Linux LVM emulation component in EVMS, as well as
participating, if you like, in other areas of the EVMS project. EVMS offers
many
areas for participation.

> Why should Linux LVM join the EVMS project ?

The EVMS project can offer some immediate solutions to current Linux LVM
issues.

- EVMS supports in-kernel reading/writing of metadata

- EVMS supports in-kernel discovery of volume groups and volumes

- EVMS can solve migration and coexistence issues.  By supporting a plugin
  design, both the original Linux LVM and the new Linux LVM (new on-disk
  format) plugins could be loaded and running simultaneously, making
  migration/coexistence a breeze.

- EVMS infrastructure virtually guarantees compatibility with future plugin
  modules allowing additional features to be added on top of the Linux LVM
  volumes and/or volume groups.

- EVMS currently supports generic snapshots (i.e. - snapshoting
   anything-to-anything under EVMS control)

> Why now ?

- The timing is right since, from reading the Linux LVM mailing list, we
can
   see that the Linux LVM on-disk format is undergoing some enhancements
   for better reliability and recoverability. The scope of these changes
may
   affect a good deal of the current Linux LVM code base. The timing of
these
   changes provides a convenient opportunity to also consider switching
over
   to the EVMS infrastructure.  Furthermore, we have code for an initial
set of
   LVM plugins that currently support in-kernel LV/VG activation, complete
   read & write support for existing Linux LVM volumes, and support for
   Linux LVM snapshots. This code could make a reasonable starting point
   for a transition to the EVMS infrastructure.

   To encourage you a little more, the EVMS project will be supporting
   emulation of the AIX Logical Volume Manager. We would be happy to
   offer the AIX disk format if you think that would be useful to your
effort
   to improve the Linux LVM on-disk format.

We hope you will join us as we look forward to working with you.

Thanks.

The EVMS Team

Re: [linux-lvm] Working together

[Heinz J. Mauelshagen]

Mark,

thanks you very much for offering this.
We are discussing your points internally and will answer in detail ASAP.

Regards,
Heinz    -- The LVM Guy --


On Fri, May 18, 2001 at 09:01:49AM -0500, Mark Peloquin wrote:
> Hello everyone,
> 
> On behalf of the EVMS project (http://sourceforge.net/projects/evms or
> http://oss.software.ibm.com/developerworks/opensource/evms) team, we
> would like to invite the Linux LVM project to join/collaborate with our
> project.  The goal of this collaboration is to offer a complimentary set of
> functionality to the Linux community, rather than multiple sets of
> functionality
> that overlap and compete.
> 
> As many of you know, the EVMS project, in design and scope, is meant to
> be a total Logical Volume Management solution, including support for the
> emulation of other volume management systems.
> 
> The EVMS team would like the Linux LVM project team to consider assuming
> responsibility for the Linux LVM emulation component in EVMS, as well as
> participating, if you like, in other areas of the EVMS project. EVMS offers
> many
> areas for participation.
> 
> > Why should Linux LVM join the EVMS project ?
> 
> The EVMS project can offer some immediate solutions to current Linux LVM
> issues.
> 
> - EVMS supports in-kernel reading/writing of metadata
> 
> - EVMS supports in-kernel discovery of volume groups and volumes
> 
> - EVMS can solve migration and coexistence issues.  By supporting a plugin
>   design, both the original Linux LVM and the new Linux LVM (new on-disk
>   format) plugins could be loaded and running simultaneously, making
>   migration/coexistence a breeze.
> 
> - EVMS infrastructure virtually guarantees compatibility with future plugin
>   modules allowing additional features to be added on top of the Linux LVM
>   volumes and/or volume groups.
> 
> - EVMS currently supports generic snapshots (i.e. - snapshoting
>    anything-to-anything under EVMS control)
> 
> > Why now ?
> 
> - The timing is right since, from reading the Linux LVM mailing list, we
> can
>    see that the Linux LVM on-disk format is undergoing some enhancements
>    for better reliability and recoverability. The scope of these changes
> may
>    affect a good deal of the current Linux LVM code base. The timing of
> these
>    changes provides a convenient opportunity to also consider switching
> over
>    to the EVMS infrastructure.  Furthermore, we have code for an initial
> set of
>    LVM plugins that currently support in-kernel LV/VG activation, complete
>    read & write support for existing Linux LVM volumes, and support for
>    Linux LVM snapshots. This code could make a reasonable starting point
>    for a transition to the EVMS infrastructure.
> 
>    To encourage you a little more, the EVMS project will be supporting
>    emulation of the AIX Logical Volume Manager. We would be happy to
>    offer the AIX disk format if you think that would be useful to your
> effort
>    to improve the Linux LVM on-disk format.
> 
> We hope you will join us as we look forward to working with you.
> 
> Thanks.
> 
> The EVMS Team
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen@Sistina.com                           +49 2626 141200
                                                       FAX 924446
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Re: [linux-lvm] Working together

[Matthew O'Keefe]

On Fri, May 18, 2001 at 09:01:49AM -0500, Mark Peloquin wrote:
> Hello everyone,
> 
> 
> > Why should Linux LVM join the EVMS project ?
> 
> The EVMS project can offer some immediate solutions to current Linux LVM
> issues.
> 
> - EVMS supports in-kernel reading/writing of metadata
> 
> - EVMS supports in-kernel discovery of volume groups and volumes
> 

Hi,
does the EVMS code work in production today?  If not, then saying
it "can offer some immediate solutions to current Linux LVM issues"
is inaccurate.  That said, its great to see another alternative
LVM appearing on the horizon for Linux.

Matt O'Keefe
Sistina Software, Inc.

> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm

[linux-lvm] Working together

[Mark Peloquin]

On Sat, 19 May 2001 11:37:54 -0500, Matt O'Keefe wrote:
> On Fri, May 18, 2001 at 09:01:49AM -0500, Mark Peloquin wrote:
> > Hello everyone,
> > 
> > 
> > > Why should Linux LVM join the EVMS project ?
> > 
> > The EVMS project can offer some immediate solutions to current Linux > >
LVM issues.
> > 
> > - EVMS supports in-kernel reading/writing of metadata
> > 
> > - EVMS supports in-kernel discovery of volume groups and volumes
> > 

> Hi,
> does the EVMS code work in production today?  

Can you rephrase the phrase "work in production" pls? I could draw 
more than one possible interpretations from this and want to reply 
to the your real question.

Are you asking if EVMS is in use by any company/business on
system used in a production environment (i.e. 24x7)?

Or are you asking if the EVMS code available on our website 
today works?

> If not, then saying
> it "can offer some immediate solutions to current Linux LVM issues"
> is inaccurate. That said, its great to see another alternative
> LVM appearing on the horizon for Linux.

Mark Peloquin






____________________________________________________________________
Get free email and a permanent address at http://www.netaddress.com/?N=1

Re: [linux-lvm] Working together

[Tracy R Reed]

On Fri, May 18, 2001 at 04:27:04PM +0000, Heinz J. Mauelshagen wrote:
> We are discussing your points internally and will answer in detail ASAP.

Why not discuss it publically?

I must say that I am quite impressed with IBM actually putting their code
where their mouth is. I would really hate to see two more competing
factions in the Linux community.

-- 
Tracy Reed      http://www.ultraviolet.org
Hacker's reply to Shared Source: "Well, that sounds like a pretty good deal.
But I think I may have a better one. How about, I give you the finger... and
you give me my GPL?"

Re: [linux-lvm] Working together

[Heinz J. Mauelshagen]

On Sat, May 19, 2001 at 10:44:06PM -0700, Tracy R Reed wrote:
> On Fri, May 18, 2001 at 04:27:04PM +0000, Heinz J. Mauelshagen wrote:
> > We are discussing your points internally and will answer in detail ASAP.
> 
> Why not discuss it publically?

That will happen soon anyway.
Thanks in advance for your patience.

Regards,
Heinz    -- The LVM Guy --

> 
> I must say that I am quite impressed with IBM actually putting their code
> where their mouth is. I would really hate to see two more competing
> factions in the Linux community.
> 
> -- 
> Tracy Reed      http://www.ultraviolet.org
> Hacker's reply to Shared Source: "Well, that sounds like a pretty good deal.
> But I think I may have a better one. How about, I give you the finger... and
> you give me my GPL?"
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen@Sistina.com                           +49 2626 141200
                                                       FAX 924446
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Re: [linux-lvm] Working together

[Ben Rafanello]

Hi Matt,

Thanks for your reply.  To answer your question, we are not in what I would
consider
to be a production mode today.  We are in the development phase making
rapid
progress.  Your team is about to release your 1.0 version, and then (I
assume) begin
work on an enhanced version (2.0?).  Thus, after your 1.0 version is
released, both of
our teams will be in development mode, and that is why we thought this
would be a
good time to join forces.

Ben Rafanello
IBM Linux Technology Center
(512) 838-4762
benr@us.ibm.com




>Hi,
>does the EVMS code work in production today?  If not, then saying
>it "can offer some immediate solutions to current Linux LVM issues"
>is inaccurate.  That said, its great to see another alternative
>LVM appearing on the horizon for Linux.
>
>Matt O'Keefe
>Sistina Software, Inc.

Re: [linux-lvm] Working together

[Heinz J. Mauelshagen]

Mark,

we thank you for your invitation to join you with work on the EVMS
project.  Obviously we are interested in the work you are doing and
support it whole heartedly.

We will be happy to help you with any technical assistance you may need
with regard to the Linux LVM system.  However we do not feel able to commit a
developer to work full time on your project for various reasons:

o The LVM team is very small, consisting of three main developers, we
  really do not have much spare man power.

o EVMS, though heading in a direction that we like, is a long way from
  going into production.  Our priority must be with the existing LVM
  system, especially now 0.9 is approaching production level.

o Our new development for the 1.2/2.0 branches has cluster support as
  it's main goal.  This does not seem to be anywhere on your roadmap.

On a more positive note components of our work, such as the standalone
snapshot driver, will undoubtedly benefit both projects.  We will take
the time to ensure that your requirements are taken into consideration
when writing these.

Regards,
Heinz    -- The LVM Guy --


On Fri, May 18, 2001 at 09:01:49AM -0500, Mark Peloquin wrote:
> Hello everyone,
> 
> On behalf of the EVMS project (http://sourceforge.net/projects/evms or
> http://oss.software.ibm.com/developerworks/opensource/evms) team, we
> would like to invite the Linux LVM project to join/collaborate with our
> project.  The goal of this collaboration is to offer a complimentary set of
<SNIP>
> 
> We hope you will join us as we look forward to working with you.
> 
> Thanks.
> 
> The EVMS Team
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen@Sistina.com                           +49 2626 141200
                                                       FAX 924446
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Re: [linux-lvm] Working together

[Mark Peloquin]

Hello Heinz,

Thank you very much for your reply. The EVMS team can understand
the Linux LVM team's position. Our invitation remains open should
your position change in the future.

The EVMS team.

On Wed, 23 May 2001 09:51:42 +0000, Heinz J. Mauelshagen wrote:
> Mark,
>
> we thank you for your invitation to join you with work on the EVMS
> project.  Obviously we are interested in the work you are doing and
> support it whole heartedly.
>
> We will be happy to help you with any technical assistance you may need
> with regard to the Linux LVM system.  However we do not feel able to
commit a
> developer to work full time on your project for various reasons:
>
> o The LVM team is very small, consisting of three main developers, we
>   really do not have much spare man power.
>
> o EVMS, though heading in a direction that we like, is a long way from
>   going into production.  Our priority must be with the existing LVM
>   system, especially now 0.9 is approaching production level.
>
> o Our new development for the 1.2/2.0 branches has cluster support as
>   it's main goal.  This does not seem to be anywhere on your roadmap.
>
> On a more positive note components of our work, such as the standalone
> snapshot driver, will undoubtedly benefit both projects.  We will take
> the time to ensure that your requirements are taken into consideration
> when writing these.
>
> Regards,
> Heinz    -- The LVM Guy --
>

> On Fri, May 18, 2001 at 09:01:49AM -0500, Mark Peloquin wrote:
> > Hello everyone,
> >
> > On behalf of the EVMS project (http://sourceforge.net/projects/evms or
> > http://oss.software.ibm.com/developerworks/opensource/evms) team, we
> > would like to invite the Linux LVM project to join/collaborate with our
> > project.  The goal of this collaboration is to offer a complimentary
set of
> <SNIP>
> >
> > We hope you will join us as we look forward to working with you.
> >
> > Thanks.
> >
> > The EVMS Team
> >

Re: [linux-lvm] Working together

[Heinz J. Mauelshagen]

On Wed, May 23, 2001 at 10:33:46AM -0500, Mark Peloquin wrote:
> Hello Heinz,
> 
> Thank you very much for your reply. The EVMS team can understand
> the Linux LVM team's position. Our invitation remains open should
> your position change in the future.

Thanks Mark,

we appreciate that very much!

Kind regards,
Heinz    -- The LVM Guy --

> 
> The EVMS team.
> 
> On Wed, 23 May 2001 09:51:42 +0000, Heinz J. Mauelshagen wrote:
> > Mark,
> >
> > we thank you for your invitation to join you with work on the EVMS
> > project.  Obviously we are interested in the work you are doing and
> > support it whole heartedly.
> >
> > We will be happy to help you with any technical assistance you may need
> > with regard to the Linux LVM system.  However we do not feel able to
> commit a
> > developer to work full time on your project for various reasons:
> >
> > o The LVM team is very small, consisting of three main developers, we
> >   really do not have much spare man power.
> >
> > o EVMS, though heading in a direction that we like, is a long way from
> >   going into production.  Our priority must be with the existing LVM
> >   system, especially now 0.9 is approaching production level.
> >
> > o Our new development for the 1.2/2.0 branches has cluster support as
> >   it's main goal.  This does not seem to be anywhere on your roadmap.
> >
> > On a more positive note components of our work, such as the standalone
> > snapshot driver, will undoubtedly benefit both projects.  We will take
> > the time to ensure that your requirements are taken into consideration
> > when writing these.
> >
> > Regards,
> > Heinz    -- The LVM Guy --
> >
> 
> > On Fri, May 18, 2001 at 09:01:49AM -0500, Mark Peloquin wrote:
> > > Hello everyone,
> > >
> > > On behalf of the EVMS project (http://sourceforge.net/projects/evms or
> > > http://oss.software.ibm.com/developerworks/opensource/evms) team, we
> > > would like to invite the Linux LVM project to join/collaborate with our
> > > project.  The goal of this collaboration is to offer a complimentary
> set of
> > <SNIP>
> > >
> > > We hope you will join us as we look forward to working with you.
> > >
> > > Thanks.
> > >
> > > The EVMS Team
> > >
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html


=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen@Sistina.com                           +49 2626 141200
                                                       FAX 924446
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-