Alexey Serbin created KUDU-3531:
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Summary: Limit the amount of resources used by tombstoned tablet
replicas
Key: KUDU-3531
URL: https://issues.apache.org/jira/browse/KUDU-3531
Project: Kudu
Issue Type: Improvement
Reporter: Alexey Serbin
I came across a case where a tablet server has just about 2K tablet replicas,
but it opened about 24K files in its WAL and data directories. The issue stems
from the fact that tobmstoned tablet replica's files are opened by the FS
manager as well, and those are kept open even if they are never about to change
or receive any Raft updates. It would be prudent to avoid keeping tombstoned
tablet replicas' files open, if possible: maybe, just read the require
information (last voted term and opId index?) and keep it in runtime
structures, but close corresponding files right after bootstrapping?
Otherwise, this doesn't seem to scale well.
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