Hi,

I'm trying to feed Ansible 2.0.0.2 dynamic inventory from an Enterprise 
CMDB system. 

The Enterprise CM system already has lots of groups defined, I want to be 
able reference them through Ansible, so I'm trying to load the Enterprise 
CM data into Ansible.

The JSON object from the CM system is 1M in size. Ansible 2.0.0.2 pegs the 
CPU for just over 4 minutes, and grows to gigabytes in RAM, until it exits 
with "[Errno 12] Cannot allocate memory".

If I manually trim the JSON object so it only contains the group I want 
(with 700 hosts), Ansible has no problem reading it in.

Ansible takes 25 seconds to run --list-hosts when the input JSON contains 
one group with 700 hosts (and I put the group name on the Ansible command 
line).

When the input JSON contains two groups with 700 hosts each, Ansible takes 
39 seconds to run (still selecting the first group only)

If I add a third group with 1 host in it, Ansible takes 5 minutes and 15 
seconds to run and uses a gig and a half of memory, pegging CPU the whole 
time:


  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 6066 root      20   0  772m 519m 4108 R 97.8 13.6   5:08.19 ansible

At this point my JSON object is 54K in size.

Here is an example JSON with three groups Ansible takes over 4 minutes to 
process:

https://gist.github.com/atsaloli/8ba19f8b4eb4ecbc2e9d

BTW, I used a little shell script to feed my JSON file to Ansible:

    time ansible all -i /tmp/di.sh --list-hosts

# cat /tmp/di.sh
#!/bin/sh
cat /tmp/list.json
#

  Am I doing something wrong?  I'd like to be able to feed this data into 
Ansible and to query it in seconds, not minutes.  Is this possible?

Best,
-at





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