[linux-lvm] Working together
Heinz J. Mauelshagen
Mauelshagen at sistina.com
Fri May 18 16:27:04 UTC 2001
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
>
> _______________________________________________
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> linux-lvm at 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 at Sistina.com +49 2626 141200
FAX 924446
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