David Alves created KUDU-1950:
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Summary: TS runs out of FDs for WALs when running many tablets
Key: KUDU-1950
URL: https://issues.apache.org/jira/browse/KUDU-1950
Project: Kudu
Issue Type: Improvement
Components: consensus, fs, tserver
Affects Versions: 1.2.0
Reporter: David Alves
A user was recently complaining that his TS ran out of FDs when he had many
tablets and that most were being used by WALs.
While this was a bit of a non-usual setup - a lot of un-replicated tablets on a
single TS - we're likely to hit this problem as we increase density and try and
have many more tablets per tablet server.
The report was that each tablet would use 3 fd's for the WAL. Ultimately we'll
likely need some solution akin to the what we've done for the FBM/LBM regarding
having an LRU cache of fds for the WAL too.
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