RocksDB gets re-compiled on every file change (reason why + workaround)
### Description Hi, I'm using the RocksDB feature, and noticed that RocksDB gets re-compiled on every file change, resulting in 100% of all my CPU cores being used for several minutes, making my system unresponsive. The reason is, that `rust-rocksdb` defaults to using a vendored version of RocksDB (i.e. not using the pre-compiled version, that might be installed on the system), which seems to result in a re-compilation on every file change. `rust-rocksdb` uses the system RocksDB if `ROCKSDB_LIB_DIR` points to the directory where it is installed (`SNAPPY_LIB_DIR` can be used for `snappy`) – however it's not great to have to specify those environment variables always and everywhere (IDE, command line, etc.). My workaround is to define these variables in [.cargo/config.toml](https://doc.rust-lang.org/cargo/reference/config.html): ```toml [env] ROCKSDB_LIB_DIR = "/usr/lib/" SNAPPY_LIB_DIR = "/usr/lib/" ``` Now every Cargo instance that runs within the project directory has `ROCKSDB_LIB_DIR` and `SNAPPY_LIB_DIR` set. I'm opening this issue mostly for visibility / so nobody else has to waste time figuring out what is going on and how to fix it (I couldn't find anything in this repo). Feel free to just close the issue. I'm not closing it myself, in case you want to add the above workaround somewhere to the documentation (which would be the right thing to do, I think). PS: See the following issue for more information: https://github.com/rust-rocksdb/rust-rocksdb/issues/310 ### Is there an existing issue for this? - [X] I have searched the existing issues ### Code of Conduct - [X] I agree to follow this project's Code of Conduct
FL score
out of 100
Verdict
medium confidence
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A GitHub issue requesting documentation for a known workaround to RocksDB recompilation in Rust projects.
The pain
The gap
Build angle
Strengths
- The problem is real and causes measurable developer friction.
- The solution is simple and reproducible.
- The issue reporter has already validated the fix works.
Risks
- This is a documentation request, not a business opportunity.
- The rust-rocksdb maintainers could close this by adding one paragraph to their README.
- The addressable market is developers using RocksDB in Rust, a subset of a subset.
- No one would pay for a product that solves this when the fix is free and takes 30 seconds to implement.
- Building a general Rust build configuration tool would face competition from established tooling and would need to solve much broader problems to justify its existence.
Fly Labs Method
Is the pain real, is there a gap, is it the right time, can one person build it.
- Problem clarity
- 82
- Solution gap
- 35
- Willingness to pay
- 15
- Buildability
- 8
Real problem with clear symptoms but the solution already exists and requires no product, only documentation or a one-line config change.
Value Equation
Dream outcome and how likely it feels, against the time and effort it costs.
Affects a narrow slice of developers using RocksDB in Rust, the workaround is already known, and there is no clear monetizable business model.
One-Person Business
Curiosity pull, identity fit, and a path from free value to paid for a solo creator.
The pain point is specific to a small developer segment, the fix is a configuration file entry, and building a business around this would require solving a non-existent market demand.
Viral Frameworks
Hook strength, shareability, and how cheaply it can be tested.
A documentation or tooling gap exists but the underlying issue is a library design choice, not a market opportunity that scales beyond niche Rust developers.
Builder Lens
Evidence the problem exists, timing, defensibility, and a model that fits on a napkin.
This is a support ticket disguised as a business idea, with no defensible moat, no network effects, and no path to venture scale.
Five lenses, one composite. How scoring works
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Other
Founders waste hours daily on repetitive tasks that AI could automate instantly
Founders spend excessive time on routine tasks that AI could complete in minutes, but no simple, purpose-built tool exists to handle them automatically without complex setup.
Other
Owners of modern Macs can't launch old games due to complex instructions involving emulators and file conversion
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