Summarize function in sharded db

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#4 opened on Apr 11, 2016 3 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 25/100

Issue type: Bug
Clarity: Needs clarification
Activity status: Stale
Domain: databases, distributed-systems

Research direction

Start by locating the Summarize function and tracing how it combines individual shard results. Compare the raw-data summary path with the partial-result path used for WS FULL. Done means shard results are summarized correctly and WS FULL does not apply the raw-data summary function incorrectly to partial results.

Written by the indexing model from the issue text.

Description

The Summarize function in sharded databases doesn't "summarize" the individual shard results. It also attempts to re-summarize partial results on WS FULL, but I believe it is doing so incorrectly by using the same summary function as originally used on the raw data.

Dominant language: APL
Stars: 33
Forks: 2
PR merge metrics: No merged PRs in 30d

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