Andrew Purtell created HBASE-13144:
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Summary: Avoid writing files to disk in unit tests
Key: HBASE-13144
URL: https://issues.apache.org/jira/browse/HBASE-13144
Project: HBase
Issue Type: Test
Reporter: Andrew Purtell
We have a number of unit tests that read and write relatively small files, but
do it often and run under a timeout clock. If the build or test host is virtual
or IO contended or both then the test can become flaky. Even if the host is up
to the IO pressure the test would run a lot faster if we were not asking the OS
to persist anything. Consider both:
- If built against Hadoop 2.6+, spin up miniclusters that keep all blocks in
memory-only storage
- Write a simple Hadoop filesystem implementation (or find one) that keeps all
state in memory and use in lieu of LocalFileSystem for unit tests.
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