toplingdb
ToplingDB is a high-performance, distributed key-value store forked from RocksDB with proprietary compression and compaction optimizations. It targets cloud-native deployments and external storage scenarios, offering faster reads/writes and lower resource usage than RocksDB through searchable compression and distributed compaction.
Key facts
Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.
| Field | Value |
|---|---|
| Repository | topling/toplingdb |
| Owner | topling |
| Primary language | C++ |
| License | GPL-2.0 — OSI-approved |
| Stars | 1k |
| Forks | 155 |
| Open issues | 9 |
| Latest release | topling-8.10.2-frocks-1.0 (2026-03-31) |
| Last updated | 2026-06-24 |
| Source | https://github.com/topling/toplingdb |
What toplingdb is
C++17 LSM-based KV store featuring SidePlugin architecture for runtime configuration, embedded HTTP server for online tuning, fiber/coroutine-based MultiGet with io_uring, and proprietary ToplingZipTable compression for L2+ levels. Includes distributed compaction offloading, de-virtualization optimizations, and zero-copy point search. Core is GPL-2.0; enterprise plugins are closed-source and trial-licensed.
Get the toplingdb source
Clone the repository and explore it locally.
git clone https://github.com/topling/toplingdb.gitcd toplingdb# follow the project's README for install & configurationNeed it deployed, integrated, or customized instead? DEV.co ships production installs.
Best use cases
Implementation considerations
- C++17 compiler required (gcc 8.3+ or clang); build dependencies include jemalloc, libaio, liburing, and optional trial-license ToplingZipTable plugin (90-day auto-download on compile).
- Community version excludes CSPP MemTable and ToplingZipTable builder; enable via private repo access or trial downloads from Topling. Feature flags (ROCKSDB_DYNAMIC_CREATE_CF, timestamps, wide columns) must be set at compile time.
- SidePlugin configuration is JSON/YAML; changes to memtable factory, table factory, cache, comparator, and compaction require schema understanding. Embedded HTTP server listens on port 2011 by default (security boundary).
- Distributed compaction requires separate dcompact_worker binaries and network coordination; operational complexity includes worker lifecycle and failure modes (not detailed in README).
- Zero-copy optimizations and fiber/coroutine MultiGet are claimed but benchmarks, latency profiles, and GC impact require independent validation; precompiled binaries available via trial download.
When to avoid it — and what to weigh
- Strict open-source-only requirement — Key performance components (CSPP MemTable, ToplingZipTable builder, ToplingRocks) are closed-source or trial-only; production use typically requires commercial licensing from Topling Inc.
- GPL-2.0 license incompatibility — If your codebase or commercial product cannot accommodate GPL-2.0 copyleft obligations, ToplingDB's core license will conflict regardless of plugin licensing.
- Small-scale, latency-critical OLTP — Overhead from distributed compaction coordination and compression algorithms may not justify gains on single-node, sub-millisecond-latency requirements without careful benchmarking.
- Minimal operational complexity required — SidePlugin architecture and distributed compaction add operational surface area (JSON/YAML config, distributed worker management, web UI security considerations).
License & commercial use
ToplingDB core is GPL-2.0, a copyleft license requiring source disclosure and derived works to be licensed under GPL-2.0. RocksDB base (also dual Apache 2.0/GPL-2.0) is inherited. Community version excludes closed-source plugins (CSPP MemTable, ToplingRocks/ToplingZipTable builder). Trial ToplingZipTable reader is time-limited; production commercial licensing from Topling Inc required.
GPL-2.0 core permits commercial use but mandates source availability and GPL licensing of derivative works in some jurisdictions. Key performance plugins (CSPP, ToplingZipTable builder) are proprietary and require explicit commercial agreement with Topling Inc. Trial components (ToplingZipTable, CSPPMemTable) are 90-day limited. Requires legal review before production deployment; contact Topling Inc ([email protected]) for licensing terms.
DEV.co evaluation signals
Editorial assessment — not user reviews. Directional, with an explicit confidence level.
| Signal | Assessment |
|---|---|
| Maintenance | Active |
| Documentation | Adequate |
| License clarity | Needs review |
| Deployment complexity | High |
| DEV.co fit | Possible |
| Assessment confidence | Medium |
Embedded HTTP server on port 2011 is a security boundary; no authentication/TLS details provided in README. Network exposure of web UI requires isolated deployment or firewall rules. GPL-2.0 compliance requires source audit if distributing binaries. Distributed compaction involves inter-node communication with unspecified security model. Dependency chain (jemalloc, liburing, zstd) requires supply-chain review. No vulnerability disclosure policy or security.md provided; requires contact with Topling Inc.
Alternatives to consider
RocksDB (upstream)
Fully open-source (Apache 2.0 + GPL-2.0), widely deployed, community-driven. Slower write amplification and compression; no distributed compaction or online reconfiguration. Lower operational complexity.
LevelDB
Simpler, smaller codebase (C++), BSD license (more permissive), suitable for embedded use. Slower reads, no advanced compression, minimal configuration; obsolete for high-scale cloud workloads.
PebbleDB
Modern LSM in Go, permissive license, CockroachDB-proven. No distributed compaction; different language ecosystem. Better for polyglot deployments, less operational overhead than ToplingDB.
Build on toplingdb with DEV.co software developers
Evaluate license compatibility with legal counsel, benchmark against RocksDB on your workload, and clarify commercial licensing for proprietary plugins (CSPP MemTable, ToplingZipTable) with Topling Inc before commitment. Test distributed compaction ROI in your infrastructure.
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toplingdb FAQ
Can I use ToplingDB in a proprietary closed-source product?
What is the difference between community and enterprise versions?
How much faster is ToplingDB than RocksDB?
Do I need to rewrite code to migrate from RocksDB?
Software developers & web developers for hire
Need help beyond evaluating toplingdb? DEV.co is a software development agency offering software development services and web development for teams of every size. Our software developers and web developers build custom software, web applications, APIs, and open-source databases integrations — and maintain them long-term.
Considering ToplingDB for Production?
Evaluate license compatibility with legal counsel, benchmark against RocksDB on your workload, and clarify commercial licensing for proprietary plugins (CSPP MemTable, ToplingZipTable) with Topling Inc before commitment. Test distributed compaction ROI in your infrastructure.