我刚开始接触Python和Rapids.AI,尝试在多节点GPU(我有两个GPU)中使用Dask和RAPIDs重新创建SKLearn KMeans。我正在使用装有Jupyter Notebook的RAPIDs docker。下面展示的代码(同时也展示了Iris数据集的例子)会卡死,jupyter notebook单元格永远不会结束。我尝试使用%debug魔术键和Dask仪表板,但没有得出任何清晰的结论(唯一的结论是可能与device_m_csv.iloc有关,但我不确定)。另一件可能发生的事情是我忘记了一些wait()、compute()或persistent()(实际上,我不确定它们应该在哪些场合正确使用)。为了更好地阅读,我将解释代码:
鸢尾花数据集示例:
- 首先,进行所需的导入
- 接下来,使用KMeans算法开始(分隔符:#######################...)
- 创建一个CUDA集群,每个GPU有2个工作进程(我有2个GPU),每个工作进程有1个线程(我已经阅读过这是推荐值),并启动客户端
- 从CSV读取数据集,将其分成2个分区(
chunksize = '2kb'
) - 将前面的数据集分成数据(更常称为
X
)和标签(更常称为y
) - 使用Dask实例化cu_KMeans
- 拟合模型
- 预测值
- 检查获得的分数
很抱歉无法提供更多数据,但我无法获取它。任何解决疑问所需的信息,我都会乐意提供。
您认为问题出在哪里或是什么问题呢?
非常感谢您提前的帮助。
%%time
# Import libraries and show its versions
import numpy as np; print('NumPy Version:', np.__version__)
import pandas as pd; print('Pandas Version:', pd.__version__)
import sklearn; print('Scikit-Learn Version:', sklearn.__version__)
import nvstrings, nvcategory
import cupy; print('cuPY Version:', cupy.__version__)
import cudf; print('cuDF Version:', cudf.__version__)
import cuml; print('cuML Version:', cuml.__version__)
import dask; print('Dask Version:', dask.__version__)
import dask_cuda; print('DaskCuda Version:', dask_cuda.__version__)
import dask_cudf; print('DaskCuDF Version:', dask_cudf.__version__)
import matplotlib; print('MatPlotLib Version:', matplotlib.__version__)
import seaborn as sns; print('SeaBorn Version:', sns.__version__)
#import timeimport warnings
from dask import delayed
import dask.dataframe as dd
from dask.distributed import Client, LocalCluster, wait
from dask_ml.cluster import KMeans as skmKMeans
from dask_cuda import LocalCUDACluster
from sklearn import metrics
from sklearn.cluster import KMeans as skKMeans
from sklearn.metrics import adjusted_rand_score as sk_adjusted_rand_score, silhouette_score as sk_silhouette_score
from cuml.cluster import KMeans as cuKMeans
from cuml.dask.cluster.kmeans import KMeans as cumKMeans
from cuml.metrics import adjusted_rand_score as cu_adjusted_rand_score
# Configure matplotlib library
import matplotlib.pyplot as plt
%matplotlib inline
# Configure seaborn library
sns.set()
#sns.set(style="white", color_codes=True)
%config InlineBackend.figure_format = 'svg'
# Configure warnings
#warnings.filterwarnings("ignore")
####################################### KMEANS #############################################################
# Create local cluster
cluster = LocalCUDACluster(n_workers=2, threads_per_worker=1)
client = Client(cluster)
# Identify number of workers
n_workers = len(client.has_what().keys())
# Read data in host memory
device_m_csv = dask_cudf.read_csv('./DataSet/iris.csv', header = 0, delimiter = ',', chunksize='2kB') # Get complete CSV. Chunksize is 2kb for getting 2 partitions
#x = host_data.iloc[:, [0,1,2,3]].values
device_m_data = device_m_csv.iloc[:, [0, 1, 2, 3]] # Get data columns
device_m_labels = device_m_csv.iloc[:, 4] # Get labels column
# Plot data
#sns.pairplot(device_csv.to_pandas(), hue='variety');
# Define variables
label_type = { 'Setosa': 1, 'Versicolor': 2, 'Virginica': 3 } # Dictionary of variables type
# Create KMeans
cu_m_kmeans = cumKMeans(init = 'k-means||',
n_clusters = len(device_m_labels.unique()),
oversampling_factor = 40,
random_state = 0)
# Fit data in KMeans
cu_m_kmeans.fit(device_m_data)
# Predict data
cu_m_kmeans_labels_predicted = cu_m_kmeans.predict(device_m_data).compute()
# Check score
#print('Cluster centers:\n',cu_m_kmeans.cluster_centers_)
#print('adjusted_rand_score: ', sk_adjusted_rand_score(device_m_labels, cu_m_kmeans.labels_))
#print('silhouette_score: ', sk_silhouette_score(device_m_data.to_pandas(), cu_m_kmeans_labels_predicted))
# Close local cluster
client.close()
cluster.close()
鸢尾花数据集示例:
编辑 1
@Corey,这是使用您的代码输出的结果:
NumPy Version: 1.17.5
Pandas Version: 0.25.3
Scikit-Learn Version: 0.22.1
cuPY Version: 6.7.0
cuDF Version: 0.12.0
cuML Version: 0.12.0
Dask Version: 2.10.1
DaskCuda Version: 0+unknown
DaskCuDF Version: 0.12.0
MatPlotLib Version: 3.1.3
SeaBorn Version: 0.10.0
Cluster centers:
0 1 2 3
0 5.006000 3.428000 1.462000 0.246000
1 5.901613 2.748387 4.393548 1.433871
2 6.850000 3.073684 5.742105 2.071053
adjusted_rand_score: 0.7302382722834697
silhouette_score: 0.5528190123564102
dask_cuda
数据框进行iloc
操作,对吧?另外,如果不麻烦的话...你能给我解释一下何时使用.compute()
、wait()
和.persistent()
吗?我已经阅读了相关资料,但我不确定什么时候该使用它们或者不使用。例如,在“# Predict data”中使用了compute()
(根据文档),但我不明白为什么要在那里使用。我对这三个概念不太清楚。再次感谢你。 - JuMoGar