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Postgresql Note

Reference

1. PostgreSQL Streaming Replication
2. PostgreSQL replication by example
3. setting-up-postgres-hot-standby.md
4. Using a Persistent NFS Volume for a Postgres Kubernetes

crazyguitar

Helm Cheat Sheet

# Add stable repo (similar to add-apt-repository)
$ helm repo add stable https://kubernetes-charts.storage.googleapis.com/ 

# list repo
$ helm repo list

# helm repo update (similar to apt update)

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GDB Note

Set binary affinity in GDB

taskset -c 4 gdb --args ./a.out

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Table of Contents

• Installing
• Adding A Shortcut
• Process
• Features

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#include <functional>
#include <map>
#include <typeinfo>
#include <iostream>

struct Event {
	virtual ~Event() {}
};
struct TestEvent : Event {
	std::string msg;

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Run this command to install MG-CLI:
sudo apt-get update && wget https://minergate.com/download/deb-cli -O minergate-cli.deb && sudo dpkg -i minergate-cli.deb

to start miner (4 cores for BCN) use this command:
minergate-cli -user <[email protected]> -bcn 4


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crazyguitar

#include "fixedp.h"
#include <iostream>

int main(int, char **)
{
    fixedp<true, 16, 16> x(0); //32-bit signed 16.16 fixed-point number
    fixedp<false, 8, 8> y(10); //16-bit unsigned 8.8 fixed-point number

    std::cout << (fixedp<false, 4, 4>(3.5) + fixedp<false, 4, 4>(4.5)).toFloat() << std::endl;
    //prints "8"

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#include <stdexcept>

/* 
   T must implement operator=, copy ctor 
*/

template<typename T> class CircBuf {
  // don't use default ctor
  CircBuf();

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# References:
# https://cmake.org/cmake/help/latest/command/add_custom_target.html
# https://samthursfield.wordpress.com/2015/11/21/cmake-dependencies-between-targets-and-files-and-custom-commands/
# https://gist.github.com/socantre/7ee63133a0a3a08f3990
# https://stackoverflow.com/questions/24163778/how-to-add-custom-target-that-depends-on-make-install
# https://stackoverflow.com/questions/30719275/add-custom-command-is-not-generating-a-target
# https://stackoverflow.com/questions/26024235/how-to-call-a-cmake-function-from-add-custom-target-command
# https://blog.csdn.net/gubenpeiyuan/article/details/51096777

cmake_minimum_required(VERSION 3.10)

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find_package(Threads REQUIRED)

ExternalProject_Add(
  googletest
  GIT_REPOSITORY https://github.com/google/googletest.git
  UPDATE_COMMAND ""
  INSTALL_COMMAND ""
  LOG_DOWNLOAD ON
  LOG_CONFIGURE ON
  LOG_BUILD ON)