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https://issues.apache.org/jira/browse/KUDU-1830?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon updated KUDU-1830:
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Labels: data-scalability (was: )
> Reduce Kudu WAL log disk usage
> ------------------------------
>
> Key: KUDU-1830
> URL: https://issues.apache.org/jira/browse/KUDU-1830
> Project: Kudu
> Issue Type: Improvement
> Components: consensus, log
> Reporter: Juan Yu
> Labels: data-scalability
>
> WAL log can take significent disk space. So far there are some config to
> limit it. but it can go very high.
> WAL log size = #tablets * log_segment_size_mb * log segments (1 if there is
> write ops to this tablet, can go up to log_max_segments_to_retain)
> Logs are retained even if there is no write for a while.
> We could reduce the WAL log usage by
> - reduce min_segments_to_retain to 1 instead of 2, a
> - reduce steady state consumption of idle tablets, roll a WAL if it has had
> no writes for a few minutes and size more than a MB or two so that "idle"
> tablets have 0 WAL space consumed
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