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[Pushkar Umaranikar <pushkar.umaranikar@xxxxxxxxx>]

I think reserved_host_memory is the amount of disk resources reserved so that they are always available to host.
The disk usage gets reported back to the scheduler from nova-compute running
on the compute nodes. To prevent the disk resources from being considered as available, this option is used to reserve disk space for that host.

Hence, I don't think nova should automatically detect system memory to
populate reserved_host_memory. Marking this bug as invalid.

** Changed in: nova
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1600143

Title:
  property  reserved_host_memory_mb size problem

Status in OpenStack Compute (nova):
  Invalid

Bug description:
  The file of nova.conf  in compute node has a property
  reserved_host_memory_mb .When I deploy compute node in used
  computer,then I need to set the property  reserved_host_memory_mb.
  But most of time I don't kown how to set this property.

  I see the code of nova,I found the default value of
  reserved_host_memory_mb is 512M. I think nova project should automatic
  detect system memory.

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