SEARCH KEYWORD -- Learning list


  Kubernetes Authentication & Authorization 101

If we want to build a system with user modules, Authentication and Authorization are something that we can never ignore, though they could be fuzzy to understand. Authentication (from Greek: αὐθεντικÏŒς authentikos, “real, genuine”, from αὐθέντης authentes, “author”) is the act of proving an assertion, such as the identity of a computer s...

   RBAC,AUTHORIZATION,AUTHENTICATION,KUBERNETES     2021-06-05 23:19:18

  MySQL index optimization

Problem description: We need to access a very big table which has 40 million records. In the table, id is the primary key and program_id is indexed. When executing a select query: select * from program_access_log where program_id between 1 and 4000 The above query executes very slowly, we thought it was because there were too many records in the table. So we added id in the where condition to limit the search so that each time only half a million records would be read. select * fr...

   MySQL,Index search, Partition     2012-12-26 13:14:20

  How Cloud Technologies Are Taking Over the World

Cloud technologies are some of the biggest accelerators of innovation today. The demand for increased speed and service delivery is driving the adoption and development of cloud platforms across industries. Gartner forecasts that the global public cloud service market will reach US$331.2 billion (S$455.83) in 2022, enjoying a 12.6% compounded annual growth rate. In Southeast Asia alone, it is estimated to reach US$40.32 billion (S$55.59 billion) by 2025 with a growing adoption among small and m...

   CLOUD,CLOUD COMPUTING     2019-10-18 12:12:12

  Fix 'this authentication plugin is not supported' issue while using Go to connect MySQL 8

MySQL 8 has changed its default authentication plugin from mysql_native_password to caching_sha2_password to improve its security. However many third party libraries seem act slowly to catch up with this change. This causes some compatible issues with their connection to MySQL. One of the issues is seen in Go libraries while it's trying to connect to MySQL 8. The specific error has been observed is "this authentication plugin is not supported". The root cause of this issue is that the go-sq...

   MYSQL,GO,MYSQL 8,AUTHENTICATION PLUGIN     2018-07-11 08:55:02

  Can a == true && a == false be true in JavaScript?

JavaScript is a weak typed language and it has a loose comparison feature where two objects/values of different type can be compared using == operator. This provides developers great flexibility and confusion at the same time.  Before understanding how == works in JavaScript, can you first answer the question in the post title? Can a == true && a == false be true in JavaScript? Normally, we would think that this expression will always return false since a can be either true or ...

   JAVASCRIPT,COMPARISON,INTERVIEW QUESTION,==     2018-03-25 03:39:43

  Python SSH Connection Tools

Program Design Purpose: We aim to create a simple Python SSH tool library that facilitates SSH communication, SCP file transfer, and SSH port forwarding through multiple jump hosts in an SSH tunnel chain. The library is designed to provide a simple API for establishing nested SSH tunnel connections through multiple jump hosts with customizable TCP ports. This allows users or their programs to automate SSH tasks such as: Batch processing SSH connection tasks, such as connecting to multiple ser...

       2024-08-30 04:46:05

  How to find which process a file is being written by in Linux?

Some people ask a file is being written by one process and they want to check this process, but they cannot find the process even with sof. This question is very common and there are many solutions, here we introduce a straightforward method. In Linux, each file will be stored on one device and of course there will be a relative inode, then we can use vfs.write to know who is writing the inode on one specified device continuously. Luckily there is inodewatch.stp in the installation package of s...

   Linux,process,file write     2013-03-16 21:44:35

  New features in PHP 5.5

Just a few days ago, the PHP official website was redesigned. It seems we directly go from Web 1.0 era to Web 2.0 era. In addition to this new change, PHP 5.5 was also released. Some new features are added in this release. Here we summarize some of them. Enable OPCache by default When installing PHP 5.5, the Zend OPCache will be compiled as OPCache by default and OPCache is enabled by default. Some changes to the language itself Add Generator function getLinesFromFile($fileName) { if (!$file...

   PHP 5.5,New features,Generator     2013-07-05 03:13:22

  3 preconditions for Facebook to enter China

It's well known that Mark Zuckerberg has a big interest in the Chinese market. Recently, the founder of Facebook visited China to attend a development forum held by the Chinese government. Along with the trip, he also paid a trip to some famous places in Beijing such as The Great Wall. He even did a morning run in front of the Tian'an men Square, the symbol of China.  In past few years, Zuckerberg also learned Chinese and read Chinese books, showed his love to the Chinese culture....

   FACEBOOK,CHINA,MARK ZUCKERBERG     2016-03-25 01:32:51

  Kualitee: For better Test Management in the year 2020

New IT trends will dominate in 2020. Big data management, customer satisfaction, security concerns, mobile apps, artificial intelligence (AI), test automation, DevOps and agile methodologies are a few of these rising technologies and trends.  With their rise, Quality assurance (QA) has to take the testing game a notch up, especially with using smart test management tools for their testing.  Test Automation Stays A report by Research and Markets estimates the global automation testing ...

   TESTING,KUALITEE     2019-09-04 07:33:25

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