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[Vishal Agarwal <vishala@xxxxxxxxxx>]

Public bug reported:

I have 5 Network nodes (NN's) on my setup each with 32 GB RAM. All have
same configuration (Created from the same ubuntu template).

I am running a scale scenario under which I am creating 4K networks each
with one subnet using rally with 100 concurrency. Ideally all the
network namespaces should have been equally divided among all the 5 NN’s
but one NN is over utilized which in turn creates resource crunch and
future requests start failing on it.

The number of namespace on the faulty NN is 1175 while other NN's have
650 to 750 namespaces. I ran the scenario twice and both the times the
result was same.

Please note if I create networks one by one without any concurrency the
namespace distribution is even and the problem is not seen.

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1548633

Title:
  One of the Network node out of five is over utilized (has more dhcp
  namespaces) than the others.

Status in neutron:
  New

Bug description:
  I have 5 Network nodes (NN's) on my setup each with 32 GB RAM. All
  have same configuration (Created from the same ubuntu template).

  I am running a scale scenario under which I am creating 4K networks
  each with one subnet using rally with 100 concurrency. Ideally all the
  network namespaces should have been equally divided among all the 5
  NN’s but one NN is over utilized which in turn creates resource crunch
  and future requests start failing on it.

  The number of namespace on the faulty NN is 1175 while other NN's have
  650 to 750 namespaces. I ran the scenario twice and both the times the
  result was same.

  Please note if I create networks one by one without any concurrency
  the namespace distribution is even and the problem is not seen.

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