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Add cache for parquet headers and symbols #2063

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cyriltovena opened this issue May 12, 2023 · 1 comment

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cyriltovena commented May 12, 2023 •

edited

We should find a way to cache using memcached parquet headers. this way can quickly seek to the page we want.

For some symbols like strings, functions, locations we should also figure a way to cache those since they are below 10MB each.

Caching read from parquet is not simple though since the parquet library solely rely on io.SeekReader.

See https://parquet.apache.org/docs/file-format/ for the metadata to cache.

Contributor Author

cyriltovena commented May 12, 2023

This is how tempo does it https://github.com/grafana/tempo/blob/main/tempodb/encoding/vparquet/readers.go#L107

If your io.ReaderAt implements that method, parquet-go will call it and tell you the footer

simonswine transferred this issue from grafana/phlare

Rperry2174 closed this as completed

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