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From "Alexey Varlamov (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-4883) [bti] BTI polls SVN repository too eagerly
Date Tue, 02 Oct 2007 09:48:50 GMT
[bti] BTI polls SVN repository too eagerly

                 Key: HARMONY-4883
                 URL: https://issues.apache.org/jira/browse/HARMONY-4883
             Project: Harmony
          Issue Type: Bug
          Components: build - test - ci
            Reporter: Alexey Varlamov
            Priority: Critical

The Integrity Testing infra built on BTI 2.0 issues too much requests to SVN server. Most
of requests are not really needed and may be optimized out w/o loosing any functionality.
Also note that standard ASF policy [1] states: "Please do not use programs that poll the repository
more frequently than hourly."
Here is the initial analysis:
1) Default CC interval is 300 sec, which is actual when there is no SVN modifications (e.g.
during weekends). Apparently it must be increased.
2) Using SVNbootstrapper feature of CC is not feasible, BTI should only update workspace after
actual modification is detected;
3) Significant overhead is added by dependency-handling machinery autogenerated by BTI. In
particular, each test adaptor checks parent's SVN repository twice (!): 1st time it uses Veto
to possibly yield tests execution in favor of parent, and then obtains list of modifications
to include them in test report. 4) Repository layout for HDK is rather complicated, consisting
of 5 separate locations. Unfortunately standard CC plugins do not allow to poll them all at
once, a sequence of requests to SVN is needed. Neverthless current HDK adaptor is suboptimal,
it should be more fine-graned to leverage HDK build peculiarities.
5) We should consider using HTTP vs HTTPS by default, to save traffic and server load.

[1] http://apache.org/dev/version-control.html

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