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8e3be5e7d6
The test/alternator/run script creates a temporary directory for the Scylla database in /tmp. The assumption was that this is the fastest disk (usually even a ramdisk) on the test machine, and we didn't need anything else from it. But it turns out that on some systems, /tmp is actually a slow disk, so this patch adds a way to configure the temporary directory - if the TMPDIR environment variable exists, it is used instead of /tmp. As before this patch, a temporary subdirectry is created in $TMPDIR, and this subdirectory is automatically deleted when the test ends. The test.py script already passes an appropriate TMPDIR (testlog/$mode), which after this patch the Alternator test will use instead of /tmp. Fixes #6750 Signed-off-by: Nadav Har'El <nyh@scylladb.com> Message-Id: <20200713193023.788634-1-nyh@scylladb.com>