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Posted to commits@pinot.apache.org by GitBox <gi...@apache.org> on 2022/07/25 15:11:13 UTC
[GitHub] [pinot] priyen opened a new pull request, #9097: [Work in progress] Distinct count HLL pre-agg on realtime side
priyen opened a new pull request, #9097:
URL: https://github.com/apache/pinot/pull/9097
This adds support for distinct count hll pre-aggregation. It introduces a new property on the fieldSpec, fixedLength in bytes so that BYTES data type can be treated as fixed length and we can utilize the FixedByteSVMutableForwardIndex.
When used for Hyperloglog data values, the fixedLength should represent in bytes the size of the Hyperloglog object when serialized.
Hyperloglog w/ log2m of 8 has a size of 180 bytes, with a log2m of 12 has a size of 2740 bytes. I unit tested using log2m of 12 because that's the size one of our use cases require
unit tests for the fixedByte mutable forward indexes' getBytes() and setBytes() new implementation
unit tests for aggregating rows and asserting on their Hyperloglog objects
Instructions:
1. The PR has to be tagged with at least one of the following labels (*):
1. `feature`
2. `bugfix`
3. `performance`
4. `ui`
5. `backward-incompat`
6. `release-notes` (**)
2. Remove these instructions before publishing the PR.
(*) Other labels to consider:
- `testing`
- `dependencies`
- `docker`
- `kubernetes`
- `observability`
- `security`
- `code-style`
- `extension-point`
- `refactor`
- `cleanup`
(**) Use `release-notes` label for scenarios like:
- New configuration options
- Deprecation of configurations
- Signature changes to public methods/interfaces
- New plugins added or old plugins removed
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[GitHub] [pinot] priyen closed pull request #9097: [Work in progress] Distinct count HLL pre-agg on realtime side
Posted by GitBox <gi...@apache.org>.
priyen closed pull request #9097: [Work in progress] Distinct count HLL pre-agg on realtime side
URL: https://github.com/apache/pinot/pull/9097
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