limbo/core/mvcc

MVCC for Rust

This is a work-in-progress the Hekaton optimistic multiversion concurrency control library in Rust. The aim of the project is to provide a building block for implementing database management systems.

Features

• Main memory architecture, rows are accessed via an index
• Optimistic multi-version concurrency control
• Rust and C APIs

Experimental Evaluation

Single-threaded micro-benchmarks

Operations	Throughput
begin_tx, read, and commit	2.2M ops/second
begin_tx, update, and commit	2.2M ops/second
read	12.9M ops/second
update	6.2M ops/second

(The cargo bench was run on a AMD Ryzen 9 3900XT 2.2 GHz CPU.)

Development

Run tests:

cargo test

Test coverage report:

cargo tarpaulin -o html

Run benchmarks:

cargo bench

Run benchmarks and generate flamegraphs:

echo -1 | sudo tee /proc/sys/kernel/perf_event_paranoid
cargo bench --bench my_benchmark -- --profile-time=5

References

Larson et al. High-Performance Concurrency Control Mechanisms for Main-Memory Databases. VLDB '11

Paper errata: The visibility check in Table 2 is wrong and causes uncommitted delete to become visible to transactions (fixed in commit 6ca3773).