[openstack-dev] [oslo.messaging] Can RPCClient.call() be used with a subset of servers?
Hello, I want to use oslo.messaging.RPCClient.call() to invoke a method on multiple servers, but not all of them. Can this be done and how? I read the code documentation (client.py and target.py). I only saw either the call used for one server at a time, or for all of them using the fanout param. Neither options is exactly what I want. Any response/explanation would be highly appreciated. Regards, Julie Gravel __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [oslo.messaging] Can RPCClient.call() be used with a subset of servers?
On Mon, Feb 9, 2015, at 02:40 PM, Gravel, Julie Chongcharoen wrote: Hello, I want to use oslo.messaging.RPCClient.call() to invoke a method on multiple servers, but not all of them. Can this be done and how? I read the code documentation (client.py and target.py). I only saw either the call used for one server at a time, or for all of them using the fanout param. Neither options is exactly what I want. Any response/explanation would be highly appreciated. This isn't a pattern that has come up before. Before we talk about adding it, I'd like to understand more about your use case. How do you know which servers should receive the call, for example? And are you actually calling and expecting a response, or do you just need to send a message to those servers? Doug Regards, Julie Gravel __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [oslo.messaging] Can RPCClient.call() be used with a subset of servers?
On 02/09/2015 04:04 PM, Doug Hellmann wrote: On Mon, Feb 9, 2015, at 02:40 PM, Gravel, Julie Chongcharoen wrote: Hello, I want to use oslo.messaging.RPCClient.call() to invoke a method on multiple servers, but not all of them. Can this be done and how? I read the code documentation (client.py and target.py). I only saw either the call used for one server at a time, or for all of them using the fanout param. Neither options is exactly what I want. Any response/explanation would be highly appreciated. This isn't a pattern that has come up before. Before we talk about adding it, I'd like to understand more about your use case. How do you know which servers should receive the call, for example? And are you actually calling and expecting a response, or do you just need to send a message to those servers? If no response is needed, you might be able to use whatever is done for notifications. Notifications are sent out to a topic, and N servers may be subscribed to receive those notifications. IIRC, that isn't done through the RPC classes, but would result in the pattern desired here. -- Russell Bryant __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Re: [openstack-dev] [oslo.messaging] Can RPCClient.call() be used with a subset of servers?
On Monday, February 9, 2015, Gravel, Julie Chongcharoen julie.gra...@hp.com wrote: Hello, I want to use oslo.messaging.RPCClient.call() to invoke a method on multiple servers, but not all of them. Can this be done and how? I read the code documentation (client.py and target.py). I only saw either the call used for one server at a time, or for all of them using the fanout param. Neither options is exactly what I want. Any response/explanation would be highly appreciated. Hello, I would say that there's no need to have such ability since since oslo.messaging is unaware of your servers, so everything you need is to write your own code to accomplish your mission. Even if you want to execute call procedures at the same time you can parallelize your code. Would that work for you? Regards, Julie Gravel Kind regards, DenisM. __ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
