HA high availability + hive+hbase+sqoop+kafka+flume+spark installation and deployment
catalogue
preface
data
HA high availability deployment
Hive installation deployment
Hbase installation and deployment
sqoop installation deployment
Unzip the installation package
Modify profile
environment variable
sqoop-env.sh
Copy JDBC Driver
Test whether Sqoop can successfully connect to the database
kafka installation and depl ...
Posted by anthonyv on Mon, 08 Nov 2021 04:33:27 -0800
Redis learning notes 7: master-slave replication and sentinel
Author: Grey
Original address: Redis learning notes 7: master-slave replication and sentinel
What are the problems with single machine, single node and single instance Redis?
It is easy to cause single point of failure, so how to solve it?
Active / standby mode
At the same time, read-write separation can be realized
Each node here is ...
Posted by Paddy on Mon, 08 Nov 2021 04:21:32 -0800
Java Web Learning - data sharing among multiple servlets
1, Data sharing
1. Overview of data sharing
Data sharing is data transfer. For example, how to transfer data to another Servlet class myservletttwo after MyServletOne is completed becomes data sharing
2. Data sharing solution
(1) ServletContext interface
(2) Cookie class
(3) HttpSession interface
(4) HttpServletRequest interface
2 ...
Posted by ozzmans on Mon, 08 Nov 2021 04:17:18 -0800
Java foundation - Dynamic Proxy
prefaceIn the source code implementation of Mybatis, the design idea of dynamic agent is used. In order to understand the dynamic agent in Mybatis, this article will study the JDK dynamic agent combined with examples and source code, and finally summarize the differences between JDK dynamic agent and CGLIB dynamic agent, so as to help better un ...
Posted by zone16 on Mon, 08 Nov 2021 04:04:53 -0800
non_max_suppression code analysis
non_max_suppression code analysis
NMS was performed simply according to confidence
def non_max_suppression(boxes, conf_thres=0.5, nms_thres=0.3):
detection = boxes
# 1. Find the box in the picture whose score is greater than the threshold function. The number of coincident boxes can be greatly reduced by filtering scores before screen ...
Posted by dloeppky on Mon, 08 Nov 2021 03:17:38 -0800
Oracle Database Oracle collection
1, Definition of Oracle collection
Set is a data type in Oracle, which stores a group of data with the same data type.
2, Composition of set
Consists of subscripts and values. The types of subscripts include numeric types (integer type, pls_integer and binary_integer) and string types. The types of values are all types in the database (b ...
Posted by shan111 on Mon, 08 Nov 2021 03:06:22 -0800
MHA high availability configuration and failover
catalogue
preface
1, MHA
1. Overview
2. Composition of MHA
3. Characteristics of MHA
2, Build MySQL MHA
1. Experimental ideas
2. Experimental environment
3. Experimental steps
3, Fault simulation
&nbs ...
Posted by luke_barnes on Mon, 08 Nov 2021 03:06:22 -0800
Serialization and deserialization technology and local serialization technology of IO stream
1, Overview
serialize
The objects in the program are stored directly in the form of files according to the sequence of objects in memoryDeserialization
Reread the object data from the file into the program
Is to read out the previously serialized object from the file and change it into an object againIn 2018, java officials found th ...
Posted by cyberdesi on Mon, 08 Nov 2021 02:57:50 -0800
MIT6.830 lab5 B+ Tree Index test report
1, Experimental overview
lab5 is mainly used to realize the B + tree index. It mainly has the functions of query, insertion and deletion. The query is mainly based on the characteristics of B + tree. The splitting of nodes should be considered for insertion (when the node tuples are full), the redistribution of elements in nodes should be cons ...
Posted by knashash on Mon, 08 Nov 2021 02:41:56 -0800
system verilog object oriented programming
Class method
A program in a class is also called a method, that is, an internal task or function defined within the scope of the class. The following example defines the display () method for the Transaction class. System Verilog will call the correct display () method according to the type of handle.
class Transaction;
bit[31:0]addr,crc ...
Posted by slands10 on Mon, 08 Nov 2021 02:38:44 -0800