[openstack-dev] [Cinder] Google Hangout recording of volume manger locks

Dulko, Michal michal.dulko at intel.com
Wed Oct 7 20:23:50 UTC 2015

On Wed, 2015-10-07 at 11:01 -0700, Walter A. Boring IV wrote:
> Hello folks,
>    I just wanted to post up the YouTube link for the video hangout that 
> the Cinder team just had.
> We had a good discussion about the local file locks in the volume 
> manager and how it affects the interaction
> of Nova with Cinder in certain cases.  We are trying to iron out how to 
> proceed ahead with removing the
> volume manager locks in a way that doesn't break the world.  The hope of 
> this is to eventually allow Cinder
> to run active/active HA c-vol services.
> The Youtube.com link for the recording is here on my personal account:
> https://www.youtube.com/watch?v=D_iXpNcWDv8
> We discussed several things in the meeting:
> * The etherpad that was used as a basis for discussion:
> https://etherpad.openstack.org/p/cinder-active-active-vol-service-issues
> * What to do with the current volume manager locks and how do we remove 
> them?
> * How do we move forward with checking 'ING' states for volume actions?
> * What is the process for moving forward with the compare/swap patches 
> that Gorka has in gerrit.
> Action Items:
> *  We agreed to take a deeper look into the main compare/swap changes 
> that Gorka has in gerrit and see if we can get those to land.
>    * https://review.openstack.org/#/c/205834/
>    * https://review.openstack.org/#/c/218012/
> * Gorka is to update the patches and add the references to the 
> specs/blueprints for reference.
> * Gorka is going to post up follow up patch sets to test the removal of 
> each lock and see if it is sufficient to remove each individual lock.
> Follow up items:
> * Does it make sense for the community to create an OpenStack Cinder 
> youtube account, where the PTL owns the account, and we run
> each of our google hangouts through that.  The advantage of this is to 
> allow the community to participate openly, as well as record each of
> our Cinder hangouts for folks that can't attend the live event.  We 
> could use this account for the meetups as well as the conference sessions,
> and have them all recorded and saved in one spot.

Unfortunately I wasn't able to attend and after watching the video I
feel like I'm on the same page, so for me it seems like a brilliant
idea! I think recordings are very beneficial in cross-timezone

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