microsoft/garnet

Bitmap compression

Closed

#1,270 opened on Jun 26, 2025

View on GitHub
 (0 comments) (0 reactions) (0 assignees)C# (660 forks)batch import
enhancementhelp wanted

Repository metrics

Stars
 (11,827 stars)
PR merge metrics
 (Avg merge 5d 16h) (55 merged PRs in 30d)

Description

Feature request type

enhancement

Is your feature request related to a problem? Please describe

It does not appear that garnet supports bitmap compression at the moment, but some highly efficient strategies exist that are loved by developers.

Describe the solution you'd like

One such strategy is RoaringBitmaps https://vikramoberoi.com/posts/a-primer-on-roaring-bitmaps-what-they-are-and-how-they-work/

Describe alternatives you've considered

See also https://github.com/aviggiano/redis-roaring

Additional context

No response

Contributor guide

Research direction
The issue requests adding bitmap compression, specifically RoaringBitmaps, to Garnet. First, review Garnet's existing bitmap commands (e.g., SETBIT, GETBIT, BITOP) and understand the storage format. Then, explore the RoaringBitmap library for C# (e.g., https://github.com/RoaringBitmap/RoaringBitmap). The implementation would involve integrating the library to encode bitmap values, potentially at the serialization/deserialization layer. Test with existing Redis clients that expect compatible behavior. No linked PRs or assignees indicate this is unclaimed.
Tech stack
csharpredis
Domain
performancedatabase
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
C#bitmap data structuresGarnet codebase
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50