For deploy and test postgres over a cluster we use ansible.

Running tests on local cluster

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To use it one need ansible hosts file with following groups:

farms/cluster.example:

[clients] # benchmark will start simultaneously on that nodes

[nodes] # all that nodes will run postgres, dtmd will be deployed to first

After you have proper hosts file you can deploy all stuff to servers:

# cd pg_dtm/tests

# ansible-playbook -i farms/sai deploy_layouts/cluster.yml

To perform dtmbench run:

# ansible-playbook -i farms/sai perf.yml -e nnodes=3 -e nconns=100

here nnodes is number of nudes that will be used for that test, nconns is the

number of connections to the backend.

Running tests on Amazon ec2

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In the case of amazon cloud there is no need in specific hosts file. Instead of it

we use script farms/ec2.py to get current instances running on you account. To use

that script you need to specify you account key and access_key in ~/.boto.cfg (or in

any other place that described at http://boto.cloudhackers.com/en/latest/boto_config_tut.html)

To create VMs in cloud run:

# ansible-playbook -i farms/ec2.py deploy_layouts/ec2.yml

After that you should wait few minutes to have info about that instances in Amazon API. After

that you can deploy postgres as usual:

# ansible-playbook -i farms/ec2.py deploy_layouts/cluster-ec2.yml

And to run a benchmark:

# ansible-playbook -i farms/sai perf-ec2.yml -e nnodes=3 -e nconns=100