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Posted to issues-all@impala.apache.org by "Joe McDonnell (JIRA)" <ji...@apache.org> on 2019/03/15 00:33:00 UTC
[jira] [Created] (IMPALA-8313) Implement a more generic means of
detecting disk properties
Joe McDonnell created IMPALA-8313:
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Summary: Implement a more generic means of detecting disk properties
Key: IMPALA-8313
URL: https://issues.apache.org/jira/browse/IMPALA-8313
Project: IMPALA
Issue Type: Improvement
Components: Backend
Affects Versions: Impala 3.2.0
Reporter: Joe McDonnell
The Disk IO Manager relies on detecting the number of disks and information such as whether each disk is rotational. This logic worked correctly for traditional hard drives of the form /dev/sda1 or similar. In IMPALA-8188, this logic was extended to support the device names associated with NVME SSDs. However, both of these are relying on specific layouts of the device names.
As [~philip] noted in IMPALA-8188, there is a more generic method for detecting these device properties. A more generic method of detecting these devices could help when new devices (or devices we haven't seen before) show up. This provides some options for generically detecting the drives: [https://unix.stackexchange.com/posts/308724/revisions]
This would need to be tested across a variety of platforms, and it would need to degrade gracefully to the old behavior.
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