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https://issues.apache.org/jira/browse/HBASE-23779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17032548#comment-17032548
 ] 

stack commented on HBASE-23779:
-------------------------------

New addendum. See below. Pushed on Master only for now. Kicked off 
https://builds.apache.org/view/H-L/view/HBase/job/HBase%20Nightly/job/branch-2/2456/
 Lets see. This addendum comes of discussion over in 
https://github.com/apache/yetus/pull/86

{code}
commit ef380e0a2e3ba138391968126fd0e9d5c910df88 (HEAD -> m, origin/master, 
origin/HEAD)
Author: stack <[email protected]>
Date:   Fri Feb 7 09:40:51 2020 -0800

     HBASE-23779 Up the default fork count; make count relative to CPU count 
(#1108)
     ADDENDUM: Refactor that comes of discussion up on 
https://github.com/apache/yetus/pull/86
     because what I committed originally, and amended in a subsequent
     ADDENDUM is not taking effect.

diff --git a/dev-support/hbase-personality.sh b/dev-support/hbase-personality.sh
index 169f19abcc..7f961c0e1e 100755
--- a/dev-support/hbase-personality.sh
+++ b/dev-support/hbase-personality.sh
@@ -82,14 +82,6 @@ function personality_globals
   # Override the maven options
   MAVEN_OPTS="${MAVEN_OPTS:-"-Xms4G -Xmx4G"}"

-  # Pass maven a -T argument. Should make it run faster. Pass conservative 
value.
-  # Default is one thread. 0.5C on an apache box of 24 cores and 2 executors 
should
-  # make for 6 threads? Lets see. Setting this here for yetus to pick up. See
-  # 
https://yetus.apache.org/documentation/0.11.1/precommit-advanced/#global-definitions
-  # See below for more on -T:
-  # 
https://cwiki.apache.org/confluence/display/MAVEN/Parallel+builds+in+Maven+3
-  MAVEN_ARGS=("-T0.5C" "${MAVEN_ARGS[@]}")
-
   # Yetus 0.7.0 enforces limits. Default proclimit is 1000.
   # Up it. See HBASE-19902 for how we arrived at this number.
   #shellcheck disable=SC2034
@@ -148,7 +140,11 @@ function personality_modules

   clear_personality_queue

-  extra="-DHBasePatchProcess"
+  # Pass maven a -T argument. Should make it run faster. Pass conservative 
value.
+  # Default is one thread. 0.5C on an apache box of 24 cores and 2 executors 
should
+  # make for 6 threads? Lets see. See below for more on -T:
+  # 
https://cwiki.apache.org/confluence/display/MAVEN/Parallel+builds+in+Maven+3
+  extra="-T0.5C -DHBasePatchProcess"
   if [[ "${PATCH_BRANCH}" = branch-1* ]]; then
     extra="${extra} -Dhttps.protocols=TLSv1.2"
   fi
{code}

> Up the default fork count to make builds complete faster; make count relative 
> to CPU count
> ------------------------------------------------------------------------------------------
>
>                 Key: HBASE-23779
>                 URL: https://issues.apache.org/jira/browse/HBASE-23779
>             Project: HBase
>          Issue Type: Bug
>          Components: test
>            Reporter: stack
>            Assignee: stack
>            Priority: Major
>             Fix For: 3.0.0, 2.3.0
>
>         Attachments: test_yetus_934.0.patch
>
>
> Tests take a long time. Our fork count running all tests are conservative -- 
> 1 (small) for first part and 5 for second part (medium and large). Rather 
> than hardcoding we should set the fork count to be relative to machine size. 
> Suggestion here is 0.75C where C is CPU count. This ups the CPU use on my box.
> Looking up at jenkins, it seems like the boxes are 24 cores... at least going 
> by my random survey. The load reported on a few seems low though this not 
> representative (looking at machine/uptime).
> More parallelism willl probably mean more test failure. Let me take a look 
> see.



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