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Re: Queue Service



Just looking at the http operations. Shouldn't the calls be around the
account then the queue?

GET /$account_id/queue/id to list all the queues
GET /$account_id/queue/id/message/id 

Am I off here? Thoughts?


On 2/14/11 5:07 PM, "Eric Day" <eday@xxxxxxxxxxxx> wrote:

>I've summarized the original email and added more sections for review
>and discussion here:
>In particular there are details on the various components of the
>queue service, a draft at what the REST operations will look like,
>and a couple brief examples.
>Please let me know if any clarification is needed and I'll update
>the wiki. Feedback and discussion on use cases and what you think
>the service should look like is very appreciated.
>On Mon, Feb 14, 2011 at 09:51:42AM -0800, Eric Day wrote:
>> Hi everyone,
>> When looking at other services to include as part of OpenStack, the
>> first that comes to mind for many is a queue. A queue service can
>> not only provide a useful public cloud service, but can also provide
>> one of the building blocks for other services. I've been leading an
>> effort to research and gather requirements for a queue service and
>> I'd like to share the current state and get community feedback. I
>> expect real development to begin very soon, and would also like to
>> identify developers who will have time to dedicate to this project.
>> I'd like to note this is not an official OpenStack project yet. The
>> intention is once we have the community support and a simple
>> implementation, we will submit the project to the OpenStack Project
>> Oversight Committee for approval.
>> The reason we are initiating our own project vs using an existing one
>> is due to simplicity, modularity, and scale. Also, very few (if any)
>> existing queue systems out there were built with multi-tenant cloud
>> use cases in mind. Very few also have a simple and extensible REST
>> API. There are possible solutions to build an AMQP based service,
>> but AMQP brings complexity and a protocol not optimized for high
>> latency and intermittent connectivity.
>> The primary goals of the queue service are:
>> * Simple - Think simple REST based queues for most use cases. Easy
>>   to access and use from any language. It should not require much
>>   setup, if any, before you can start pushing messages into it.
>> * Modular API - Initially we'll focus on a simple REST API,
>>   but this will not in any way be a first-class API. It should be
>>   possible to add other protocols (AMQP, protocol buffers, Gearman,
>>   etc) for other use cases. Note that the internal service API will
>>   not always provide a 1-1 mapping with the external API, so some
>>   features with advanced protocols may be unavailable.
>> * Fast - Since this will act as a building block for other services
>>   that my drive heavy throughput, performance will have a focus. This
>>   mostly comes down to implementation language and how clients and
>>   workers interact with the broker to reduce network chatter.
>> * Multi-tenant - Support multiple accounts for the service, and since
>>   this will also be a public service for some deployments, protect
>>   against potentially malicious users.
>> * Persistent - Allow messages to optionally be persistent. For
>>   protocols that can support it, this can be an optional flag while
>>   the message is submitted. The persistent storage should also be
>>   modular so we can test various data stores and accommodate different
>>   deployment options.
>> * Zones and locality awareness - As we've been discussing in other
>>   threads, locality in cloud services is an important feature. When
>>   dealing with where messages should be processed, we need to have
>>   location awareness to process data where it exists to reduce network
>>   overhead and processing time.
>> Before diving down into implementation details, I would like to hear
>> what folks have to say about the initial requirements above. Once
>> there is something along the lines of agreement, I'll be sending out
>> other topics for discussion dealing with implementation.
>> I'm looking forward to your feedback. Thanks!
>> -Eric
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