# ChangeLog

## Release 0.5.2 - 3/4/2019
### Improvements
* Curve fitting assessor performance improvement.

### Documentation
* Chinese version document: https://nni.readthedocs.io/zh/latest/
* Debuggability/serviceability document: https://nni.readthedocs.io/en/latest/HowToDebug.html
* Tuner assessor reference: https://nni.readthedocs.io/en/latest/sdk_reference.html#tuner

### Bug Fixes and Other Changes
* Fix a race condition bug that does not store trial job cancel status correctly.
* Fix search space parsing error when using SMAC tuner.
* Fix cifar10 example broken pipe issue.
* Add unit test cases for nnimanager and local training service.
* Add integration test azure pipelines for remote machine, PAI and kubeflow training services.
* Support Pylon in PAI webhdfs client.


## Release 0.5.1 - 1/31/2018
### Improvements
* Making [log directory](https://github.com/Microsoft/nni/blob/v0.5.1/docs/en_US/ExperimentConfig.md) configurable
* Support [different levels of logs](https://github.com/Microsoft/nni/blob/v0.5.1/docs/en_US/ExperimentConfig.md), making it easier for debugging 

### Documentation
* Reorganized documentation & New Homepage Released: https://nni.readthedocs.io/en/latest/

### Bug Fixes and Other Changes
* Fix the bug of installation in python virtualenv, and refactor the installation logic
* Fix the bug of HDFS access failure on PAI mode after PAI is upgraded. 
* Fix the bug that sometimes in-place flushed stdout makes experiment crash


## Release 0.5.0 - 01/14/2019

### Major Features

#### New tuner and assessor supports

* Support [Metis tuner](metisTuner.md) as a new NNI tuner. Metis algorithm has been proofed to be well performed for **online** hyper-parameter tuning.
* Support [ENAS customized tuner](https://github.com/countif/enas_nni), a tuner contributed by github community user, is an algorithm for neural network search, it could learn neural network architecture via reinforcement learning and serve a better performance than NAS.
* Support [Curve fitting assessor](curvefittingAssessor.md) for early stop policy using learning curve extrapolation.
* Advanced Support of [Weight Sharing](./AdvancedNAS.md): Enable weight sharing for NAS tuners, currently through NFS.

#### Training Service Enhancement

* [FrameworkController Training service](./FrameworkControllerMode.md): Support run experiments using frameworkcontroller on kubernetes
  * FrameworkController is a Controller on kubernetes that is general enough to run (distributed) jobs with various machine learning frameworks, such as tensorflow, pytorch, MXNet.
  * NNI provides unified and simple specification for job definition.
  * MNIST example for how to use FrameworkController.

#### User Experience improvements

* A better trial logging support for NNI experiments in OpenPAI, Kubeflow and FrameworkController mode:
  * An improved logging architecture to send stdout/stderr of trials to NNI manager via Http post. NNI manager will store trial's stdout/stderr messages in local log file.
  * Show the link for trial log file on WebUI.
* Support to show final result's all key-value pairs.

## Release 0.4.1 - 12/14/2018

### Major Features

#### New tuner supports

* Support [network morphism](networkmorphismTuner.md) as a new tuner

#### Training Service improvements

* Migrate [Kubeflow training service](KubeflowMode.md)'s dependency from kubectl CLI to [Kubernetes API](https://kubernetes.io/docs/concepts/overview/kubernetes-api/) client
* [Pytorch-operator](https://github.com/kubeflow/pytorch-operator) support for Kubeflow training service
* Improvement on local code files uploading to OpenPAI HDFS
* Fixed OpenPAI integration WebUI bug: WebUI doesn't show latest trial job status, which is caused by OpenPAI token expiration

#### NNICTL improvements

* Show version information both in nnictl and WebUI. You can run **nnictl -v** to show your current installed NNI version

#### WebUI improvements

* Enable modify concurrency number during experiment
* Add feedback link to NNI github 'create issue' page
* Enable customize top 10 trials regarding to metric numbers (largest or smallest)
* Enable download logs for dispatcher & nnimanager
* Enable automatic scaling of axes for metric number
* Update annotation to support displaying real choice in searchspace

### New examples

* [FashionMnist](https://github.com/Microsoft/nni/tree/master/examples/trials/network_morphism), work together with network morphism tuner
* [Distributed MNIST example](https://github.com/Microsoft/nni/tree/master/examples/trials/mnist-distributed-pytorch) written in PyTorch

## Release 0.4 - 12/6/2018

### Major Features

* [Kubeflow Training service](./KubeflowMode.md)
  * Support tf-operator
  * [Distributed trial example](https://github.com/Microsoft/nni/tree/master/examples/trials/mnist-distributed/dist_mnist.py) on Kubeflow
* [Grid search tuner](gridsearchTuner.md) 
* [Hyperband tuner](hyperbandAdvisor.md)
* Support launch NNI experiment on MAC
* WebUI
  * UI support for hyperband tuner
  * Remove tensorboard button
  * Show experiment error message
  * Show line numbers in search space and trial profile
  * Support search a specific trial by trial number
  * Show trial's hdfsLogPath
  * Download experiment parameters

### Others

* Asynchronous dispatcher
* Docker file update, add pytorch library 
* Refactor 'nnictl stop' process, send SIGTERM to nni manager process, rather than calling stop Rest API. 
* OpenPAI training service bug fix
  * Support NNI Manager IP configuration(nniManagerIp) in OpenPAI cluster config file, to fix the issue that user’s machine has no eth0 device 
  * File number in codeDir is capped to 1000 now, to avoid user mistakenly fill root dir for codeDir
  * Don’t print useless ‘metrics is empty’ log in OpenPAI job’s stdout. Only print useful message once new metrics are recorded, to reduce confusion when user checks OpenPAI trial’s output for debugging purpose
  * Add timestamp at the beginning of each log entry in trial keeper.

## Release 0.3.0 - 11/2/2018

### NNICTL new features and updates

* Support running multiple experiments simultaneously.

  Before v0.3, NNI only supports running single experiment once a time. After this realse, users are able to run multiple experiments simultaneously. Each experiment will require a unique port, the 1st experiment will be set to the default port as previous versions. You can specify a unique port for the rest experiments as below:

  ```bash
  nnictl create --port 8081 --config <config file path>
  ```

* Support updating max trial number.
  use `nnictl update --help` to learn more. Or refer to [NNICTL Spec](NNICTLDOC.md) for the fully usage of NNICTL.

### API new features and updates

* <span style="color:red">**breaking change**</span>: nn.get_parameters() is refactored to nni.get_next_parameter. All examples of prior releases can not run on v0.3, please clone nni repo to get new examples. If you had applied NNI to your own codes, please update the API accordingly.

* New API **nni.get_sequence_id()**. 
  Each trial job is allocated a unique sequence number, which can be retrieved by nni.get_sequence_id() API.

  ```bash
  git clone -b v0.3 https://github.com/Microsoft/nni.git
  ```

* **nni.report_final_result(result)** API supports more data types for result parameter.

  It can be of following types:
  * int
  * float
  * A python dict containing 'default' key, the value of 'default' key should be of type int or float. The dict can contain any other key value pairs.

### New tuner support

* **Batch Tuner** which iterates all parameter combination, can be used to submit batch trial jobs.

### New examples

* A NNI Docker image for public usage:

  ```bash
  docker pull msranni/nni:latest
  ```

* New trial example: [NNI Sklearn Example](https://github.com/Microsoft/nni/tree/master/examples/trials/sklearn)
* New competition example: [Kaggle Competition TGS Salt Example](https://github.com/Microsoft/nni/tree/master/examples/trials/kaggle-tgs-salt)

### Others

* UI refactoring, refer to [WebUI doc](WebUI.md) for how to work with the new UI.
* Continuous Integration: NNI had switched to Azure pipelines
* [Known Issues in release 0.3.0](https://github.com/Microsoft/nni/labels/nni030knownissues).

## Release 0.2.0 - 9/29/2018

### Major Features

* Support [OpenPAI](https://github.com/Microsoft/pai) Training Platform (See [here](./PAIMode.md) for instructions about how to submit NNI job in pai mode)
  * Support training services on pai mode. NNI trials will be scheduled to run on OpenPAI cluster
  * NNI trial's output (including logs and model file) will be copied to OpenPAI HDFS for further debugging and checking
* Support [SMAC](https://www.cs.ubc.ca/~hutter/papers/10-TR-SMAC.pdf) tuner (See [here](smacTuner.md) for instructions about how to use SMAC tuner)
  * [SMAC](https://www.cs.ubc.ca/~hutter/papers/10-TR-SMAC.pdf) is based on Sequential Model-Based Optimization (SMBO). It adapts the most prominent previously used model class (Gaussian stochastic process models) and introduces the model class of random forests to SMBO to handle categorical parameters. The SMAC supported by NNI is a wrapper on [SMAC3](https://github.com/automl/SMAC3)
* Support NNI installation on [conda](https://conda.io/docs/index.html) and python virtual environment
* Others
  * Update ga squad example and related documentation
  * WebUI UX small enhancement and bug fix

### Known Issues

[Known Issues in release 0.2.0](https://github.com/Microsoft/nni/labels/nni020knownissues).

## Release 0.1.0 - 9/10/2018 (initial release)

Initial release of Neural Network Intelligence (NNI).

### Major Features

* Installation and Deployment
  * Support pip install and source codes install
  * Support training services on local mode(including Multi-GPU mode) as well as multi-machines mode
* Tuners, Assessors and Trial
  * Support AutoML algorithms including:  hyperopt_tpe, hyperopt_annealing, hyperopt_random, and evolution_tuner
  * Support assessor(early stop) algorithms including: medianstop algorithm
  * Provide Python API for user defined tuners and assessors
  * Provide Python API for user to wrap trial code as NNI deployable codes
* Experiments
  * Provide a command line toolkit 'nnictl' for experiments management
  * Provide a WebUI for viewing experiments details and managing experiments
* Continuous Integration
  * Support CI by providing out-of-box integration with [travis-ci](https://github.com/travis-ci) on ubuntu
* Others
  * Support simple GPU job scheduling

### Known Issues

[Known Issues in release 0.1.0](https://github.com/Microsoft/nni/labels/nni010knownissues).
