HdrHistogram / HdrHistogram/HdrHistogram_rust

Allow customizing handling of out-of-range counts when serializing

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#41 2 comments 0 reactions 0 assignees View on GitHub

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Dominant language
Rust
Stars
372
Forks
50
PR merge metrics
No merged PRs in 30d

Description

We allow u64 counts, but the serialization format only allows i64::max_value() as the largest count. So, you can end up with an un-serializable histogram.

It would be nice if the user could choose what to do in such a situation. Right now we always error, which means I needed to do things like https://github.com/jonhoo/hdrsample/pull/40/files#diff-c761d465047faa0efb455f492b2f1e07R528 when testing serialization with random counts.

Options that come to mind:

  • Error (we've got this one now)
  • Squish oversized counts down to i64::max_value()
  • ???

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the serialization handling described in this issue and review the behavior referenced in pull request #40. Define the supported options for counts above i64::max_value(), then verify that serialization follows the selected handling instead of always returning an error.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
data
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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