Kai Wang lotusk

Update Nvidia driver on CentOS 7.x

Download the latest Nvidia driver on http://www.nvidia.com/drivers

Update the kernel to the latest version

$ yum update

Change to runlevel 3 - multi user mode for the next reboot

	from pyspark.sql.types import *
	from pyspark.sql.functions import *

	#Flatten array of structs and structs
	def flatten(df):
	# compute Complex Fields (Lists and Structs) in Schema
	complex_fields = dict([(field.name, field.dataType)
	for field in df.schema.fields
	if type(field.dataType) == ArrayType or type(field.dataType) == StructType])
	while len(complex_fields)!=0:

	# ### Interface cuSOLVER PyCUDA

	import pycuda.gpuarray as gpuarray
	import pycuda.driver as cuda
	import pycuda.autoinit
	import numpy as np
	import scipy.sparse as sp
	import ctypes

	## Wrap the cuSOLVER cusolverSpDcsrlsvqr() using ctypes