>
> When will the sending service know that it should resend a message?
> Wouldn't this be best done a pull basis be the receiving service?
>
I'm obviously approaching from the perspective of the ZeroMQ driver which has a
PUSH-PULL pair that are tightly coupled. A successful PULL is a successf
On Tue, Jun 12, 2012, Eric Windisch wrote:
> > For instance, an instance migration can take a while since we need to
> > copy many gigabytes of disks to another host. If we want to do a
> > software upgrade, we either need to wait a long time for the migration
> > to finish, or we need to restart
On 06/12/2012 12:55 PM, Johannes Erdfelt wrote:
> As part of a patch to add idempotency to the xenapi driver, I've
> modified impl_kombu driver to implement delayed ACKs. This is so RPC
> messages are retried after nova-compute restarts.
>
> https://review.openstack.org/#/c/7323/
>
> However, thi
>
> For instance, an instance migration can take a while since we need to
> copy many gigabytes of disks to another host. If we want to do a
> software upgrade, we either need to wait a long time for the migration
> to finish, or we need to restart the service and then restart the
> processing of
On Tue, Jun 12, 2012, Eric Windisch wrote:
> We actually do have ACKs in ZeroMQ, as far as I understand how they work
> in AMQP, but they're really simple. The send() method is actually
> synchronous with the message being received on the other end. However,
> we don't wait for this and spawn an e
We actually do have ACKs in ZeroMQ, as far as I understand how they work in
AMQP, but they're really simple. The send() method is actually synchronous with
the message being received on the other end. However, we don't wait for this
and spawn an eventlet coroutine, because there is no benefit of
As part of a patch to add idempotency to the xenapi driver, I've
modified impl_kombu driver to implement delayed ACKs. This is so RPC
messages are retried after nova-compute restarts.
https://review.openstack.org/#/c/7323/
However, this only works with impl_kombu.
impl_qpid does not ACK anything
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