Apache
/
hbase
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

HBASE-6884 Update documentation on unit tests 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1390687 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael Stack 2012-09-26 19:23:01 +00:00
parent e2d9560d65
commit c9cb2ee851
1 changed files with 6 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
src/docbkx/developer.xml
View File

@ -475,17 +475,18 @@ report: "[INFO] Tests are skipped". It's harmless.
<para>
By default, <code>$ mvn test -P runAllTests</code> runs 5 tests in parallel.
It can be increased on a developer's machine. Allowing that you can have 2
tests in parallel per core, and you need about 2Gb of memory per test,
if you have a 8 cores and 24Gb box, you can have 16 tests in parallel.
To run 16 in parallel, do this:
<command>mvn test -P runAllTests -Dsurefire.secondPartThreadCount=16</command>.
tests in parallel per core, and you need about 2Gb of memory per test (at the
extreme), if you have an 8 core, 24Gb box, you can have 16 tests in parallel.
but the memory available limits it to 12 (24/2), To run all tests with 12 tests
in parallell, do this:
<command>mvn test -P runAllTests -Dsurefire.secondPartThreadCount=12</command>.
To increase the speed, you can as well use a ramdisk. You will need 2Gb of memory
to run all tests. You will also need to delete the files between two test run.
The typical way to configure a ramdisk on Linux is:
<programlisting>$ sudo mkdir /ram2G
sudo mount -t tmpfs -o size=2048M tmpfs /ram2G</programlisting>
You can then use it to run all HBase tests with the command:
<command>mvn test -P runAllTests -Dsurefire.secondPartThreadCount=16 -Dtest.build.data.basedirectory=/ram2G</command>
<command>mvn test -P runAllTests -Dsurefire.secondPartThreadCount=12 -Dtest.build.data.basedirectory=/ram2G</command>
</para>
</section>