Open Stack

Tobe,

The BP for the feature that added replica_count is here - https://github.com/openstack/trove-specs/blob/master/specs/kilo/replication-v2.rst

Your suggestion for changing the semantic of the API is interesting – I would interested to know what others in the community thought about this as well. Maybe you could file a BP and suggest this improvement?

Regards,
Doug

From: 陈迪豪 <chendihao at unitedstack.com<mailto:chendihao at unitedstack.com>>
Reply-To: OpenStack List <openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>
Date: Thursday, August 13, 2015 at 4:12 AM
To: OpenStack List <openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>
Subject: Re: [openstack-dev] [trove]Implement the API to createmasterinstance and slave instances with one request

We have read the code of "replica_count" and it's like what I thought.

We have an suggestion to extend this feature. When users set "slave_of_id" and "replica_count" at the same time, we just create replica instances. If they use "replica_count" without using "slave_of_id", we should create an master instance for them and some replica instances of it.

For example, "trove create $name --replica-of $id --replica_count=2" will create 2 replica instances. And "trove create $name --replica_count=2" will create 1 master instance and 2 replica instances.

What do you think Doug?

Regards,
tobe from UnitedStack

------------------ Original ------------------
From:  "陈迪豪"<chendihao at unitedstack.com<mailto:chendihao at unitedstack.com>>;
Date:  Thu, Aug 13, 2015 12:25 PM
To:  "openstack-dev at lists."<openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>;
Subject:  Re: [openstack-dev] [trove]Implement the API to createmasterinstance and slave instances with one request

Thanks Doug.

It's really helpful and we need this feature as well. Can you point out the bp or patch of this?

I think we will add "--replica-count" parameter within trove create request. So trove-api will create trove instance(aync create nova instance) and then create some replica trove instances(aync create nova instances). This is really useful for web front-end developers to create master and replica instances in the same time(they don't want to send multiple requests by themselves).

Regards,
tobe from UnitedStack

------------------ Original ------------------
From:  "Doug Shelley"<doug at tesora.com<mailto:doug at tesora.com>>;
Date:  Wed, Aug 12, 2015 10:21 PM
To:  "openstack-dev at lists."<openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>;
Subject:  Re: [openstack-dev] [trove]Implement the API to create masterinstance and slave instances with one request

As of Kilo, you can add a —replica-count parameter to trove create —replica-of to have it spin up multiple mysql slaves simultaneously. This same construct is in the python/REST API as well. I realize that you still need to create a master first, but thought I would point this out as it might be helpful to you.

Regards,
Doug


From: 陈迪豪 <chendihao at unitedstack.com<mailto:chendihao at unitedstack.com>>
Reply-To: OpenStack List <openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>
Date: Tuesday, August 11, 2015 at 11:45 PM
To: OpenStack List <openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>
Subject: [openstack-dev] [trove]Implement the API to create master instance and slave instances with one request

Now we can create mysql master instance and slave instance one by one.

It would be much better to allow user to create one master instance and multiple slave instances with one request.

Any suggestion about this, the API design or the implementation?
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