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https://issues.apache.org/jira/browse/LUCENE-9158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17020603#comment-17020603
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Robert Muir commented on LUCENE-9158:
-------------------------------------
its the simplest thing that can work, that's all. we can tweak the patch here
to be more complicated :)
I do think the default should be for ordinary users, jenkins can set a sysprop
such as workDir instead? I think {{ant test}} should play nicely with the
user's system out-of-box without a lot of special configuration.
Also as far as fancy per-module stuff, its unclear what to do here. I don't
think running tests from 2 different checkouts at the same time is going to
practically work. For example there are tests that bind to hardcoded network
port numbers and will conflict with each other.
> Fix tests to respect java.io.tmpdir by default
> ----------------------------------------------
>
> Key: LUCENE-9158
> URL: https://issues.apache.org/jira/browse/LUCENE-9158
> Project: Lucene - Core
> Issue Type: Improvement
> Components: general/test
> Reporter: Robert Muir
> Priority: Major
> Attachments: LUCENE-9158.patch
>
>
> Currently the tests destroy your SSDs by writing temp test data to
> {{build/test/}} in your checkout.
> It would be better to respect {{java.io.tmpdir}} for where all the temporary
> files get written. This way, if someone has configured their
> system/environment variables appropriately, it won't destroy SSD.
> On linux it may work by default in many cases, as a lot of linux systems
> mount {{/tmp}} on tmpfs by default.
> On windows users could have created a [RAM
> drive|https://en.wikipedia.org/wiki/List_of_RAM_drive_software] such as
> {{R:}} and have {{TMP}} environment variable pointed at it, we should respect
> that.
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