Updated keystone authenticate user_story

Took runs by changing public_workers parameter from 1 to 4 in
keytone configuration file, which increases parallelism.

Change-Id: I21315f0a56124642ac58c237e47db0b315d9e490

doc/user_stories/keystone/authenticate.rst

@@ -6,16 +6,18 @@ Authenticate users with keystone to get tokens.
 Goal
 ----
 - To get data about performance of token creation under different load.
-- To ensure that keystone under apache works better than the default setup that uses event-let.
+- To ensure that keystone with increased  public_workers/admin_workers values
+  and under Apache works better than the default setup.
 
 Summary
 -------
 - As the concurrency increases, time to authenticate the user gets up.
-- Running keystone inside apache gives 4x better performance for this setup. With
+- Keystone is CPU bound process and by default only one thread of keystone-all process get
-  the default configuration of keystone only single threaded process is launched,
+  started. We can increase the parallelism by :-
-  which is bottlenecked on CPU. Running keystone inside apache enables us to
+  1. increasing public_workers/admin_workers values in keystone.conf file
-  get authentication done on multiple CPUs, which gives better performance.
+  2. running keystone inside Apache
-
+- We configured Keystone with 4 public_workers and ran Keystone inside Apache. In both
+  cases we got upto 4x better performance as compared to default keystone configuration.
 
 Setup
 -----
@@ -33,7 +35,10 @@ Keystone - Commit#455d50e8ae360c2a7598a61d87d9d341e5d9d3ed
 
 Keystone API - 2
 
-To run keystone inside apache - Added *APACHE_ENABLED_SERVICES=key* in localrc file while setting up OpenStack environment with devstack.
+To increase public_workers - Uncomment line with public_workers and set public_workers to 4. Then restart keystone service.
+
+To run keystone inside Apache - Added *APACHE_ENABLED_SERVICES=key* in localrc file while setting up OpenStack environment with devstack.
+
 
 Results
 -------
@@ -46,17 +51,15 @@ Results
                          | 'runner': {'concurrency': 4, 'times': 10000, 'type': 'constant'}}
 
 
-+--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+
++--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+--------------+
-| action | min (sec) | avg (sec) | max (sec) | 90 percentile | 95 percentile | success | count |apache enabled keystone|
+| action | min (sec) | avg (sec) | max (sec) | 90 percentile | 95 percentile | success | count |apache enabled keystone|public_workers|
-+--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+
++--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+--------------+
-| total  | 0.537     | 0.998     | 4.553     | 1.233         | 1.391         | 100.0%  | 10000 |           N           |
+| total  | 0.537     | 0.998     | 4.553     | 1.233         | 1.391         | 100.0%  | 10000 |           N           |      1       |
-+--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+
++--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+--------------+
-| total  | 0.208     | 0.299     | 3.228     | 0.437         | 0.485         | 100.0%  | 10000 |           Y           |
+| total  | 0.189     | 0.296     | 5.099     | 0.417         | 0.474         | 100.0%  | 10000 |           N           |      4       |
-+--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+
++--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+--------------+
-
+| total  | 0.208     | 0.299     | 3.228     | 0.437         | 0.485         | 100.0%  | 10000 |           Y           |      NA      |
-Graphs
++--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+--------------+
-  - ./authenticate/times_10000_concurrency_4_apacheEnabledKeystone_N.html
-  - ./authenticate/times_10000_concurrency_4_apacheEnabledKeystone_Y.html
 
 
 2. Concurrency = 16
@@ -66,17 +69,15 @@ Graphs
                          | 'users_per_tenant': 512}},
                          | 'runner': {'concurrency': 16, 'times': 10000, 'type': 'constant'}}
 
-+--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+
++--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+--------------+
-| action | min (sec) | avg (sec) | max (sec) | 90 percentile | 95 percentile | success | count |apache enabled keystone|
+| action | min (sec) | avg (sec) | max (sec) | 90 percentile | 95 percentile | success | count |apache enabled keystone|public_workers|
-+--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+
++--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+--------------+
-| total  | 1.036     | 3.905     | 11.254    | 5.258         | 5.700         | 100.0%  | 10000 |            N          |
+| total  | 1.036     | 3.905     | 11.254    | 5.258         | 5.700         | 100.0%  | 10000 |           N           |      1       |
-+--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+
++--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+--------------+
-| total  | 0.515     | 0.970     | 2.076     | 1.113         | 1.192         | 100.0%  | 10000 |           Y           |
+| total  | 0.187     | 1.012     | 5.894     | 1.61          | 1.856         | 100.0%  | 10000 |           N           |      4       |
-+--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+
++--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+--------------+
-
+| total  | 0.515     | 0.970     | 2.076     | 1.113         | 1.192         | 100.0%  | 10000 |           Y           |      NA      |
-Graphs
++--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+--------------+
-  - ./authenticate/times_10000_concurrency_16_apacheEnabledKeystone_N.html
-  - ./authenticate/times_10000_concurrency_16_apacheEnabledKeystone_Y.html
 
 
 3. Concurrency = 32
@@ -86,15 +87,12 @@ Graphs
                          | 'users_per_tenant': 512}},
                          | 'runner': {'concurrency': 32, 'times': 10000, 'type': 'constant'}}
 
-+--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+
++--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+--------------+
-| action | min (sec) | avg (sec) | max (sec) | 90 percentile | 95 percentile | success | count |apache enabled keystone|
+| action | min (sec) | avg (sec) | max (sec) | 90 percentile | 95 percentile | success | count |apache enabled keystone|public_workers|
-+--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+
++--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+--------------+
-| total  | 1.493     | 7.752     | 16.007    | 10.428        | 11.183        | 100.0%  | 10000 |           N           |
+| total  | 1.493     | 7.752     | 16.007    | 10.428        | 11.183        | 100.0%  | 10000 |           N           |       1      |
-+--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+
++--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+--------------+
-| total  | 1.115     | 1.986     | 6.224     | 2.133         | 2.244         | 100.0%  | 10000 |           Y           |
+| total  | 0.198     | 1.967     | 8.54      | 3.223         | 3.701         | 100.0%  | 10000 |           N           |       4      |
-+--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+
++--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+--------------+
-
+| total  | 1.115     | 1.986     | 6.224     | 2.133         | 2.244         | 100.0%  | 10000 |           Y           |       NA     |
-Graphs
++--------+-----------+-----------+-----------+---------------+---------------+---------+-------+-----------------------+--------------+
-  - ./authenticate/times_10000_concurrency_32_apacheEnabledKeystone_N.html
-  - ./authenticate/times_10000_concurrency_32_apacheEnabledKeystone_Y.html
-