rumax

#!/bin/bash
# Copyright (c) <2018> <Maksym Rusynyk>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#

maiha

概要

これは何？

以下の情報を元に Galera と GR のレプリケーションの違いをまとめたもの。

• https://www.percona.com/blog/2017/02/24/battle-for-synchronous-replication-in-mysql-galera-vs-group-replication/
• http://lefred.be/content/group-replication-vs-galera/
• https://www.slideshare.net/StevenLi6/open-stack-ha-designampdeployment-kilo
• https://www.slideshare.net/Grypyrg/percona-xtradb-cluster-vs-galera-cluster-vs-mysql-group-replication
• http://mysqlhighavailability.com/performance-evaluation-mysql-5-7-group-replication/

matsuu

-- ORDER BYとLIMITは必要応じて適宜修正
-- VIEWを作成すると便利
SELECT
  count_star AS cnt,
  sum_timer_wait/1e12 AS sum,
  min_timer_wait/1e12 AS min,
  avg_timer_wait/1e12 AS avg,
  max_timer_wait/1e12 AS max,
  sum_rows_sent AS sumRows,
  sum_rows_sent/count_star AS avgRows,

filipefigcorreia

Kafka Topics

List existing topics

bin/kafka-topics.sh --zookeeper localhost:2181 --list

Purge a topic

bin/kafka-topics.sh --zookeeper localhost:2181 --alter --topic mytopic --config retention.ms=1000

... wait a minute ...

bin/kafka-topics.sh --zookeeper localhost:2181 --alter --topic mytopic --delete-config retention.ms

zchee

--- Actions ---
$Copy                                              <M-C>
$Cut                                               <M-X> <S-Del>
$Delete                                            <Del> <BS> <M-BS>
$LRU                                              
$Paste                                             <M-V>
$Redo                                              <M-S-Z> <A-S-BS>
$SearchWeb                                         <A-S-G>
$SelectAll                                         <M-A>
$Undo                                              <M-Z>

notxcain

/*
 * Copyright (c) 2014-15 Denis Mikhaylov
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software

runarorama

sealed trait Interact[A]

case class Ask(prompt: String)
  extends Interact[String]

case class Tell(msg: String)
  extends Interact[Unit]

trait Monad[M[_]] {
  def pure[A](a: A): M[A]