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From "Tom Melendez (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LIBCLOUD-826) GCE list nodes performance improvement
Date Mon, 06 Jun 2016 16:20:20 GMT
Tom Melendez created LIBCLOUD-826:
-------------------------------------

             Summary: GCE list nodes performance improvement
                 Key: LIBCLOUD-826
                 URL: https://issues.apache.org/jira/browse/LIBCLOUD-826
             Project: Libcloud
          Issue Type: Improvement
          Components: Compute
            Reporter: Tom Melendez


list_nodes currently makes at least one independent API call to the disks/get API (to obtain
disk information) for each node in the list.  This change will use the disks/aggregatedList
API for this instead, reducing NUM_INSTANCES API calls to one.

I ran some simple command-line tests to demonstrate the improvements in response time and
API calls.

Below is an in-network comparison using 40 nodes in 4 different regions.

||Code||instances/zones/regions||Time (sec)||API Calls
|Current 1.0|40/4/2|6.805|43|
|with disks/aggregatedList|40/4/2|0.919|4|

I have a PR forthcoming to implement this.




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