MLOS is a project to enable autotuning for systems.
MLOS currently focuses on an offline tuning approach, though we intend to add online tuning in the future.
To accomplish this, the general flow involves
- Running a workload (i.e., benchmark) against a system (e.g., a database, web server, or key-value store).
- Retrieving the results of that benchmark, and perhaps some other metrics from the system.
- Feed that data to an optimizer (e.g., using Bayesian Optimization or other techniques).
- Obtain a new suggested config to try from the optimizer.
- Apply that configuration to the target system.
- Repeat until either the exploration budget is consumed or the configurations' performance appear to have converged.
Source: LlamaTune: VLDB 2022
For a brief overview of some of the features and capabilities of MLOS, please see the following video:
To do this this repo provides two Python modules, which can be used independently or in combination:
-
mlos-benchprovides a framework to help automate running benchmarks as described above. -
mlos-vizprovides some simple APIs to help automate visualizing the results of benchmark experiments and their trials.It provides a simple
plot(experiment_data)API, whereexperiment_datais obtained from themlos_bench.storagemodule. -
mlos-coreprovides an abstraction around existing optimization frameworks (e.g., FLAML, SMAC, etc.)It is intended to provide a simple, easy to consume (e.g. via
pip), with low dependencies abstraction to- describe a space of context, parameters, their ranges, constraints, etc. and result objectives
- an "optimizer" service abstraction (e.g.
register()andsuggest()) so we can easily swap out different implementations methods of searching (e.g. random, BO, LLM, etc.) - provide some helpers for automating optimization experiment runner loops and data collection
For these design requirements we intend to reuse as much from existing OSS libraries as possible and layer policies and optimizations specifically geared towards autotuning systems over top.
By providing wrappers we aim to also allow more easily experimenting with replacing underlying optimizer components as new techniques become available or seem to be a better match for certain systems.
See CONTRIBUTING.md for details on development environment and contributing.
The development environment for MLOS uses conda and devcontainers to ease dependency management, but not all these libraries are required for deployment.
For instructions on setting up the development environment please try one of the following options:
- see CONTRIBUTING.md for details on setting up a local development environment
- launch this repository (or your fork) in a codespace, or
- have a look at one of the autotuning example repositories like sqlite-autotuning to kick the tires in a codespace in your browser immediately :)
-
Create the
mlosConda environment.conda env create -f conda-envs/mlos.yml
See the
conda-envs/directory for additional conda environment files, including those used for Windows (e.g.mlos-windows.yml).or
# This will also ensure the environment is update to date using "conda env update -f conda-envs/mlos.yml" make conda-envNote: the latter expects a *nix environment.
-
Initialize the shell environment.
conda activate mlos
For an example of using the mlos_core optimizer APIs run the BayesianOptimization.ipynb notebook.
For an example of using the mlos_bench tool to run an experiment, see the mlos_bench Quickstart README.
Here's a quick summary:
./scripts/generate-azure-credentials-config > global_config_azure.jsonc
# run a simple experiment
mlos_bench --config ./mlos_bench/mlos_bench/config/cli/azure-redis-1shot.jsoncSee Also:
- mlos_bench/README.md for more details on this example.
- mlos_bench/config for additional configuration details.
- sqlite-autotuning for a complete external example of using MLOS to tune
sqlite.
For a simple example of using the mlos_viz module to visualize the results of an experiment, see the sqlite-autotuning repository, especially the mlos_demo_sqlite_teachers.ipynb notebook.
The MLOS modules are published to pypi when new releases are tagged:
To install the latest release, simply run:
# this will install just the optimizer component with SMAC support:
pip install -U mlos-core[smac]
# this will install just the optimizer component with flaml support:
pip install -U "mlos-core[flaml]"
# this will install just the optimizer component with smac and flaml support:
pip install -U "mlos-core[smac,flaml]"
# this will install both the flaml optimizer and the experiment runner with azure support:
pip install -U "mlos-bench[flaml,azure]"
# this will install both the smac optimizer and the experiment runner with ssh support:
pip install -U "mlos-bench[smac,ssh]"
# this will install the postgres storage backend for mlos-bench
# and mlos-viz for visualizing results:
pip install -U "mlos-bench[postgres]" mlos-vizDetails on using a local version from git are available in CONTRIBUTING.md.
- API and Examples Documentation: https://microsoft.github.io/MLOS
- Source Code Repository: https://github.com/microsoft/MLOS
-
Working example of tuning
sqlitewith MLOS.
These can be used as starting points for new autotuning projects.
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