[Info-vax] Large mailboxes

[Jan-Erik Söderholm]

Den 2020-11-30 kl. 18:12, skrev Marc Van Dyck:
> Jan-Erik Söderholm submitted this idea :
>> Den 2020-11-30 kl. 14:17, skrev Jean-François Piéronne:
>>>
>>> Le 30/11/2020 à 10:35, Jan-Erik Söderholm a écrit :
>>>> Den 2020-11-30 kl. 07:37, skrev Jean-François Piéronne:
>>>>>
>>>>> Le 29/11/2020 à 20:18, Arne Vajhøj a écrit :
>>>>> [snip]
>>>>>
>>>>>> RabbitMQ is a fine traditional message queue (Kafka is not
>>>>>> a traditional message queue - it is often called a
>>>>>> message stream processing service).
>>>>>>
>>>>>> RabbitMQ is probably the most popular non-Java
>>>>>> open source message queue.
>>>>>>
>>>>>
>>>>> Correct, and is language agnostic. Kafka is Java oriented.
>>>>>
>>>>> JF
>>>>>
>>>>
>>>> Now, without reading through a lot of docs, can one get
>>>> a quick answer to an easy question? :-)
>>>>
>>>> Is the VMS port of RabbitMQ both server and client?
>>>> Or does the VMS port need an "external" RabbitMQ server?
>>>>
>>>> I mean, if I'd like to look at a solution with RabbitMQ
>>>> to raplace our current VMS/mailbox IPC setup, can that be
>>>> done locally within our VMS Alpha systems?
>>>
>>> There is a old port of the server, but my best advice is to deploy the
>>> server part on Linux, this is what all sites I knew have done.
>>> The last I have installed used a cluster of 3 RabbitMQ nodes and 2
>>> ha-proxy front-end.
>>>
>>> Client part, no problem, including on old VMS version.
>>> https://foss.vmsgenerations.org/openvms/libraries/rabbitmq-c
>>> https://foss.vmsgenerations.org/openvms/wasd/rmqplus
>>> Python module:
>>> https://foss.vmsgenerations.org/openvms/python/modules/pika
>>>
>>> JFP
>>>
>>
>> OK.
>> I have no idea if RabbitMQ is used within my client environment.
>> They have IBM MQ/WebSphere as their main messaging tool.
>>
>> To have something simple to replace/complement our MBX based
>> IPC right now, I'd not like to involve any Linux in the picture.
>> It has to be VMS only if it is going to be used for VMS only.
> 
> If you have to interact with an IBM MQ environment, you migh also
> consider using PAHO_C, which is supported and distributed by VSI,
> and happily interacts with an IBM MQ server using the MQTT protocol.
> We use it, under heavy loads, and it works perfectly. Be sure to use
> the last version.
> 

We use the IBM MQ clkient for VMS. From Cobol and (now) from Python.