[linux-lvm] Some questions about the upcoming LVM v2_02_178

[linux-lvm] Some questions about the upcoming LVM v2_02_178

[Gang He]

Hello List,

I saw there was a tag "v2_02_178-rc1" for LVM2, then I have some questions about  the upcoming LVM v2_02_178.
1) Will there be the version v2_02_178 for LVM2? since I saw some text about Version 3.0.0 in the git change logs.

2) For the next LVM2 version, which components will be affected? since I saw that clvmd related code has been removed.

3) If clvmd is removed in the next version, which existed features will be affected?
 
4) What is the next version?  v2_02_178 or v3_0_0 ? 


Thanks
Gang

Re: [linux-lvm] Some questions about the upcoming LVM v2_02_178

[Joe Thornber]

On Tue, Jun 12, 2018 at 03:01:27AM -0600, Gang He wrote:
> Hello List,
> 
> I saw there was a tag "v2_02_178-rc1" for LVM2, then I have some questions about  the upcoming LVM v2_02_178.
> 1) Will there be the version v2_02_178 for LVM2? since I saw some text about Version 3.0.0 in the git change logs.

Yes there will be.  We've had no bug reports for the -rc, so the final
release will be the same as the -rc.

> 2) For the next LVM2 version, which components will be affected? since I saw that clvmd related code has been removed.

We've decided to bump the version number to 3.0.0 for the release
*after* 2.02.178.  This change in version number indicates the *start*
of some large changes to lvm.

Obviously the release notes for v3.0.0 will go into this more.  But,
initially the most visible changes will be removal of a couple of
features:

clvmd
-----

The locking required to provide this feature was quite pervasive and
was restricting the adding of new features (for instance, I'd like to
be able to allocate from any LV not just PVs).  With Dave Teigland's
lvmlockd I think the vast majority of use cases are covered.  Those
that are wedded to clvmd can continue to use LVM2.02.*

Also, testing cluster software is terribly expensive, we just don't
have the resources to provide two solutions.

lvmapi
------

This library has been deprecated for a while in favour of the dbus api.


- Joe

Re: [linux-lvm] Some questions about the upcoming LVM v2_02_178

[Gang He]

Hello Joe,


>>> On 2018/6/12 at 22:22, in message <20180612142219.ixpzqxqws3qiwqbm@reti>, Joe
Thornber <thornber@redhat.com> wrote:
> On Tue, Jun 12, 2018 at 03:01:27AM -0600, Gang He wrote:
>> Hello List,
>> 
>> I saw there was a tag "v2_02_178-rc1" for LVM2, then I have some questions 
> about  the upcoming LVM v2_02_178.
>> 1) Will there be the version v2_02_178 for LVM2? since I saw some text about 
> Version 3.0.0 in the git change logs.
> 
> Yes there will be.  We've had no bug reports for the -rc, so the final
> release will be the same as the -rc.
Between LVM2 v2_02_178-rc1 and  LVM2 v2_02_177, 
there will not be any components/features remove, except include some bug fixes, right?

Thanks a lot.
Gang 

> 
>> 2) For the next LVM2 version, which components will be affected? since I saw 
> that clvmd related code has been removed.
> 
> We've decided to bump the version number to 3.0.0 for the release
> *after* 2.02.178.  This change in version number indicates the *start*
> of some large changes to lvm.
> 
> Obviously the release notes for v3.0.0 will go into this more.  But,
> initially the most visible changes will be removal of a couple of
> features:
> 
> clvmd
> -----
> 
> The locking required to provide this feature was quite pervasive and
> was restricting the adding of new features (for instance, I'd like to
> be able to allocate from any LV not just PVs).  With Dave Teigland's
> lvmlockd I think the vast majority of use cases are covered.  Those
> that are wedded to clvmd can continue to use LVM2.02.*
> 
> Also, testing cluster software is terribly expensive, we just don't
> have the resources to provide two solutions.
> 
> lvmapi
> ------
> 
> This library has been deprecated for a while in favour of the dbus api.
> 
> 
> - Joe
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com 
> https://www.redhat.com/mailman/listinfo/linux-lvm 
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

Re: [linux-lvm] Some questions about the upcoming LVM v2_02_178

[Joe Thornber]

On Tue, Jun 12, 2018 at 08:14:17PM -0600, Gang He wrote:
> Hello Joe,
> 
> 
> >>> On 2018/6/12 at 22:22, in message <20180612142219.ixpzqxqws3qiwqbm@reti>, Joe
> Thornber <thornber@redhat.com> wrote:
> > On Tue, Jun 12, 2018 at 03:01:27AM -0600, Gang He wrote:
> >> Hello List,
> >> 
> >> I saw there was a tag "v2_02_178-rc1" for LVM2, then I have some questions 
> > about  the upcoming LVM v2_02_178.
> >> 1) Will there be the version v2_02_178 for LVM2? since I saw some text about 
> > Version 3.0.0 in the git change logs.
> > 
> > Yes there will be.  We've had no bug reports for the -rc, so the final
> > release will be the same as the -rc.
> Between LVM2 v2_02_178-rc1 and  LVM2 v2_02_177, 
> there will not be any components/features remove, except include some bug fixes, right?


178 dropped support for two very old metadata formats (pool and lvm1), and switched
to async io all io ops apart from logging.

Re: [linux-lvm] Some questions about the upcoming LVM v2_02_178

[Gang He]

Hello Joe,

Thank for your patient explaining, very useful.

-Gang

>>> On 2018/6/13 at 17:43, in message <20180613094303.53zhqymzojhr5dsx@reti>, Joe
Thornber <thornber@redhat.com> wrote:
> On Tue, Jun 12, 2018 at 08:14:17PM -0600, Gang He wrote:
>> Hello Joe,
>> 
>> 
>> >>> On 2018/6/12 at 22:22, in message <20180612142219.ixpzqxqws3qiwqbm@reti>, Joe
>> Thornber <thornber@redhat.com> wrote:
>> > On Tue, Jun 12, 2018 at 03:01:27AM -0600, Gang He wrote:
>> >> Hello List,
>> >> 
>> >> I saw there was a tag "v2_02_178-rc1" for LVM2, then I have some questions 
>> > about  the upcoming LVM v2_02_178.
>> >> 1) Will there be the version v2_02_178 for LVM2? since I saw some text 
> about 
>> > Version 3.0.0 in the git change logs.
>> > 
>> > Yes there will be.  We've had no bug reports for the -rc, so the final
>> > release will be the same as the -rc.
>> Between LVM2 v2_02_178-rc1 and  LVM2 v2_02_177, 
>> there will not be any components/features remove, except include some bug 
> fixes, right?
> 
> 
> 178 dropped support for two very old metadata formats (pool and lvm1), and 
> switched
> to async io all io ops apart from logging.
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com 
> https://www.redhat.com/mailman/listinfo/linux-lvm 
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/