HBase Code Examples and Concepts
HBase Code Examples
Creating a Table
This code demonstrates how to create a table in HBase with two column families:
private void createTable() throws IOException { byte[] table = Bytes.toBytes("User"); byte[] cf1 = Bytes.toBytes("PersonalData"); byte[] cf2 = Bytes.toBytes("LoginData"); HTableDescriptor hTable = new HTableDescriptor(table); HColumnDescriptor family1 = new HColumnDescriptor(cf1); family1.setMaxVersions(10); hTable.addFamily(family1); HColumnDescriptor family2 = new HColumnDescriptor(Switch Configuration for 04-009133HEML-G-A-C3850XS-12
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service compress-config
service unsupported-transceiver
!
(region number) (building Addres) (location of the switch)( A switch first switch) (model of the switch)
hostname 04-009133HEML–G–A–C3850XS–12
!
boot-start-marker
boot-end-marker
!
!
vrf definition Mgmt-vrf
!
address-family ipv4
exit-address-family
!
address-family ipv6
exit-address-family
!
enable secret 5 $1$YzBN$LO8xmIvCUoLW5yIpVXWS80
Linux System Administration Guide
CHAPTER 1
SSH
ssh-keygen
ssh-copy-id server0
connect:
ssh server0
know the hostname:
ssh server0 hostname
HELP FROM RED HAT
redhat-support-tool
opencase –product=”Red Hat Enterprise Linux” –version=”7.0″
listcases
modifycase
to attacht sosreport do sosreport
sosreport
send attachment
JFI: find / -type f -name “asdfasdf.Txt”
CHAPTER 2
MANAGING FILES USING COMMAND-LNE TOOLS
Basic operations
cp
mv
rm
mkdir
Making Links Between Files
Differences between symbolic link and hard link
Let’s summarize
Python Requests Library: Making HTTP Requests for Humans
Python Requests Library: Making HTTP Requests
The Requests library for Python simplifies making HTTP requests, offering an elegant and user-friendly experience.
Making a Request
Start by importing the Requests module:
>>> import requestsTo retrieve a webpage, such as GitHub’s public timeline, use the get method:
>>> r = requests.get('https://api.github.com/events')This creates a Response object named r containing information about the response.
Other HTTP Methods
Requests supports various
Read MoreJavaScript Programming Examples: Fibonacci, Temperature Converter, and More
JavaScript Programming Examples
Fibonacci Sequence Generator
This program generates the first N Fibonacci numbers using JavaScript.
Input: A number N obtained using prompt.
Output: The first N Fibonacci numbers.
Temperature Converter
This program converts Fahrenheit to Celsius using JavaScript.
Input: A temperature value in Fahrenheit.
Output: The equivalent temperature in Celsius.
Arithmetic Calculator
This program performs basic arithmetic operations (addition, subtraction, multiplication, division, modulus)
Read MoreMachine Learning Concepts and Techniques: A Comprehensive Guide
Linear vs. Non-linear Logistic Regression
Answer: Non-linear in probability, linear in log-odds.
Explanation: Logistic regression models log-odds linearly, but outcome probabilities non-linearly.
MSE and Gradient Descent Updates
- MSE Formula:
MSE = (1/n) * sum((yi - y_hat_i)^2) - Gradient Descent Update:
theta_new = theta_old - alpha * grad(MSE) - Explanation: Minimizes average squared error, updates parameters to reduce MSE.
BIC for GMM
- BIC Formula:
BIC = ln(n)*k - 2*ln(L_hat) - Explanation: Penalizes model