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OSProfiler provides a tiny but powerful library that is used by most (soon to
be all) OpenStack projects and their python clients.
It provides functionality to be able to generate 1 trace per request, that goes
through all involved services. This trace can then be extracted and used to
build a tree of calls which can be quite handy for a variety of reasons (for
example in isolating cross-project performance issues).
WWW: https://docs.openstack.org/osprofiler/
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