Video: I/O profiling as a service

For most customers Mistral is deployed in production to find bottlenecks and detect applications with really bad I/O patterns. However, Mistral can also be integrated into continuous integration and test frameworks as a service. This allows users and developers to opt-in for more detailed I/O profiling data.

This procedure helps to raise quality standards and prevent I/O issues from making their way into production code. In particular, it helps to avoid issues such as hard coded paths that only work in the test environment, failed I/O calls that indicate a reliance on path variables and small I/O.


There are several ways to implement I/O profiling as a service. For example:

  1. Introduce a manual option that developers can use to get more info about dependencies.
  2. Carry out specific production tests with I/O profiling that simulate real-life workloads that should be checked for bad I/O patterns or a regression in performance.
  3. Carry out specific production tests with I/O profiling that are designed to maximise I/O to try to catch the perfect storm that can happen when systems are pushed to their limits.

We suggest starting with I/O patterns that are known to be bad and then adding regression test coverage as specific problems in your system are better understood.

How to do it with Ellexus

  1. Watch our YouTube video of Mistral running as a service
  2. Contact us to find out more about deploying Mistral for wide coverage in production.
  3. Ask us about configuring options for Mistral to gather more detailed I/O profiling data in regression tests

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Ellexus Ltd
St John’s Innovation Centre,
Cambridge CB4 0WS, UK
Tel: +44 (0)1223 42 16 46 UK