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Asynchronous Domino endpoints may impose additional storage requirements on MongoDB and RabbitMQ depending on the number of API invocations and other factors. Here are the default volume sizes for MongoDB and RabbitMQ in a new Domino deployment:
  • MongoDB storage volume size: 100 GiB
  • RabbitMQ storage volume size: 25 GiB
The default configuration can support asynchronous Domino endpoints based on the following parameters:
ParameterValue
Number of asynchronous Domino endpoints100
Number of API requests per endpoint per day5,000
MongoDB document size10 KiB
MongoDB document retention2 days
RabbitMQ request message size10 KiB
RabbitMQ response message size10 KiB
RabbitMQ request input queue retention2 days
RabbitMQ response output queue retention2 days
The sections below show how to calculate MongoDB and RabbitMQ storage requirements for asynchronous Domino endpoints using the above parameters.

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MongoDB storage requirements

  • Number of documents per endpoint per day Number of API requests per endpoint per day
  • Additional MongoDB storage Number of asynchronous Domino endpoints x Number of documents per endpoint per day x MongoDB document size x MongoDB document retention
Example: 
100 endpoints x 5,000 documents per endpoint per day x 10 KiB x 2 days =~ `10 GiB`

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RabbitMQ storage requirements

  • Number of API responses per endpoint per day Number of API requests per endpoint per day
  • RabbitMQ request input queue storage Number of asynchronous Domino endpoints x Number of API requests per endpoint per day x RabbitMQ request message size x RabbitMQ request input queue retention
  • RabbitMQ response output queue storage Number of asynchronous Domino endpoints x Number of API responses per endpoint per day x RabbitMQ response message size x RabbitMQ response output queue retention
  • Additional RabbitMQ storage RabbitMQ request input queue storage + RabbitMQ response output queue storage
Example: 
(100 endpoints x 5,000 requests per endpoint per day x 10 KiB x 2 days) + (100 endpoints x 5,000 responses per endpoint per day x 10 KiB x 2 days) =~ `20 GiB

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Minimum available storage

To prevent asynchronous Domino endpoints from filling the disks, Domino monitors MongoDB and RabbitMQ disk storage metrics and stops accepting new asynchronous Domino endpoint requests when the available disk storage falls below the following configurable thresholds:
Configuration Records KeyDefault Value
com.cerebro.domino.modelApis.async.mongoDb.minimumAvailableBytes500000000
com.cerebro.domino.modelApis.async.rabbitmq.availableAsyncLimitBytes1000000000