Andrew Wong created KUDU-2135:
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Summary: Persist disk health state to disk
Key: KUDU-2135
URL: https://issues.apache.org/jira/browse/KUDU-2135
Project: Kudu
Issue Type: Improvement
Components: fs
Reporter: Andrew Wong
When a tablet server disk fails, it is marked FAILED in memory and not touched
during the lifetime of the tablet server. The next time the tablet server is
started, however, if the disk happens to start up successfully, it will be used
as is.
This may be risky, as the disk may be corrupted, or may be more prone to
runtime failures. Additionally, when we begin striping metadata or WALs, we may
end up with multiple of them for a single tablet (e.g. one that was on the
failed disk, and another if the tablet was reassigned to the same tablet
server). As such, the contents of the previously failed disk should not be
used. It is thus necessary to persist the health of a disk to ensure unhealthy
disks are not used.
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