Re: [openstack-dev] [nova] Request Spec Freeze Exception (DRBD for Nova)

2015-02-16 Thread Philipp Marek
Hi Daniel,
 
> The current feature freeze exceptions are being gathered for code
> reviews whose specs/blueprints are already approved. Since your
> spec does not appear to be approved, you would have to first
> request a spec freeze exception, but I believe it is too late for
> that now in Kilo.
I sent the Spec Freeze Exception request in January:
http://lists.openstack.org/pipermail/openstack-dev/2015-January/054225.html


Regards,

Phil

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Re: [openstack-dev] [nova] Request Spec Freeze Exception (DRBD for Nova)

2015-02-16 Thread Daniel P. Berrange
On Mon, Feb 16, 2015 at 03:06:34PM +0100, Philipp Marek wrote:
> Hi all,
> 
> Nikola just told me that I need an FFE for the code as well.
> 
> Here it is: please grant a FFE for 
> 
> https://review.openstack.org/#/c/149244/
> 
> which is the code for the spec at
> 
> https://review.openstack.org/#/c/134153/

The current feature freeze exceptions are being gathered for code
reviews whose specs/blueprints are already approved. Since your
spec does not appear to be approved, you would have to first
request a spec freeze exception, but I believe it is too late for
that now in Kilo.

Regards,
Daniel
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Re: [openstack-dev] [nova] Request Spec Freeze Exception (DRBD for Nova)

2015-02-16 Thread Philipp Marek
Hi all,

Nikola just told me that I need an FFE for the code as well.

Here it is: please grant a FFE for 

https://review.openstack.org/#/c/149244/

which is the code for the spec at

https://review.openstack.org/#/c/134153/


Regards,

Phil

-- 
: Ing. Philipp Marek
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com :

DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.

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Re: [openstack-dev] [nova] Request Spec Freeze Exception (DRBD for Nova)

2015-01-30 Thread Duncan Thomas
+1

Very excited to see this in and usable

Duncan Thomas
On Jan 30, 2015 2:56 AM, "Philipp Marek"  wrote:

> Hi all,
>
> > in Paris (and later on, on IRC and the mailing list) I began to ask
> around
> > about providing a DRBD storage driver for Nova.
> > This is an alternative to using iSCSI for block storage access, and would
> > be especially helpful for backends already using DRBD for replicated
> > storage.
> any news about this?
> https://review.openstack.org/#/c/134153/
>
>
> To reiterate:
>   * Spec was submitted in time (Nov 13)
>   * Spec wasn't approved, because the Cinder implementation
> (https://review.openstack.org/#/c/140451/) merge got delayed,
> because its prerequisite (https://review.openstack.org/#/c/135139/,
> Transition LVM Driver to use Target Objects) wasn't merged in time,
> because on "deadline day" (Dec. 17) Gerrit was so much used that
> this devstack run got timeouts against some python site during
> setup
>   * "Spec Freeze Exception" was submitted in time
>
> http://lists.openstack.org/pipermail/openstack-dev/2015-January/054225.html
>   * Having DRBD for Cinder is good, but using the *same* protocol
> to the Nova nodes should really help performance (and reliability);
> for example, the transitions
>   Network -> Kernel -> iSCSI daemon -> Kernel -> Block Device
> wouldn't be needed anymore; the Kernel could directly respond to the
> queries, and in the near future even using RDMA (where available).
> Reliability should be improved as the Nova node can access multiple
> storage nodes _at the same time_, so it wouldn't matter if one of them
> crashes for whatever reason.
>
>
> Please help us *now* to get the change in. It's only a few lines in
> a separate driver, so until it gets configured it won't even be
> noticed!
>
>
> And yes, of course we're planning to do CI for that Nova driver, too.
>
>
> Regards,
>
> Phil
>
> --
> : Ing. Philipp Marek
> : LINBIT | Your Way to High Availability
> : DRBD/HA support and consulting http://www.linbit.com :
>
> DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.
>
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Re: [openstack-dev] [nova] Request Spec Freeze Exception (DRBD for Nova)

2015-01-30 Thread Philipp Marek
Hi all,

> in Paris (and later on, on IRC and the mailing list) I began to ask around 
> about providing a DRBD storage driver for Nova.
> This is an alternative to using iSCSI for block storage access, and would 
> be especially helpful for backends already using DRBD for replicated 
> storage.
any news about this?
https://review.openstack.org/#/c/134153/


To reiterate:
  * Spec was submitted in time (Nov 13)
  * Spec wasn't approved, because the Cinder implementation
(https://review.openstack.org/#/c/140451/) merge got delayed,
because its prerequisite (https://review.openstack.org/#/c/135139/,
Transition LVM Driver to use Target Objects) wasn't merged in time,
because on "deadline day" (Dec. 17) Gerrit was so much used that
this devstack run got timeouts against some python site during
setup
  * "Spec Freeze Exception" was submitted in time
http://lists.openstack.org/pipermail/openstack-dev/2015-January/054225.html
  * Having DRBD for Cinder is good, but using the *same* protocol
to the Nova nodes should really help performance (and reliability);
for example, the transitions
  Network -> Kernel -> iSCSI daemon -> Kernel -> Block Device
wouldn't be needed anymore; the Kernel could directly respond to the
queries, and in the near future even using RDMA (where available).
Reliability should be improved as the Nova node can access multiple
storage nodes _at the same time_, so it wouldn't matter if one of them
crashes for whatever reason.


Please help us *now* to get the change in. It's only a few lines in
a separate driver, so until it gets configured it won't even be
noticed!


And yes, of course we're planning to do CI for that Nova driver, too.


Regards,
 
Phil

-- 
: Ing. Philipp Marek
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com :

DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.

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[openstack-dev] [nova] Request Spec Freeze Exception (DRBD for Nova)

2015-01-12 Thread Philipp Marek
Hello all,

in Paris (and later on, on IRC and the mailing list) I began to ask around 
about providing a DRBD storage driver for Nova.
This is an alternative to using iSCSI for block storage access, and would 
be especially helpful for backends already using DRBD for replicated 
storage.


The spec at

https://review.openstack.org/#/c/134153/

was not approved in December on the grounds that the DRBD Cinder driver 

https://review.openstack.org/#/c/140451/

should be merged first; because of (network) timeouts during the K-1 
milestone (and then merge conflicts, rebased dependencies, etc.) it wasn't
merged until recently (Jan 5th).

Now that the Cinder driver is already upstream, we'd like to ask for 
approval of the Nova driver - it would provide quite some performance boost 
over having all block storage data.


Thank you for your kind consideration!


Regards,

Phil

-- 
: Ing. Philipp Marek
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com :

DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.

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