jihoonson commented on issue #6988: [Improvement] historical fast restart by lazy load columns metadata(20X faster) URL: https://github.com/apache/incubator-druid/pull/6988#issuecomment-460871761 Hi @pzhdfy, have you had a chance to test `druid.segmentCache.numBootstrapThreads` option (http://druid.io/docs/latest/configuration/index.html#storing-segments)? It's to set # of segments to load concurrently from local storage at startup. I wonder how different its effect is from the lazy loading of column metadata.
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