Kairi

# pssh 10.140.0.[3-7] example 
pssh -H "`echo 10.140.0.{3..7}`" -i -I "bash -s" < local_script.sh

Kairi

# reference CPU num
grep "^processor"  /proc/cpuinfo | wc -l

Kairi

func do_something {
;
}
dir=`mktemp -d`
while [ ]; do 
  { do_something >/dev/null 2>&1; echo $? >> "$dir/$BASHPID"; } &
done
wait

Kairi

#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/blkdev.h>
#include <linux/elevator.h>
#include <linux/bio.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/compiler.h>
#include <linux/rbtree.h>

Kairi

/*
 *  TPPS, or Tiny Parallel Proportion disk Scheduler.
 *
 *  Based on ideas from Zhu Yanhai <gaoyang.zyh@taobao.com>
 *
 *  Copyright (C) 2013 Robin Dong <sanbai@taobao.com>
 */
#include <linux/module.h>
#include <linux/blkdev.h>
#include <linux/elevator.h>

Kairi

/*
 * Simple IO scheduler
 * Based on Noop, Deadline and V(R) IO schedulers.
 * This algorithm does not do any kind of sorting, as it is aimed for
 * aleatory access devices, but it does some basic merging. We try to
 * keep minimum overhead to achieve low latency.
 *
 * Asynchronous and synchronous requests are not treated separately, but
 * we relay on deadlines to ensure fairness.
 *

Kairi

package main
import (
        "fmt"
        "bufio"
        "os"
)

var sc = bufio.NewScannner(os.Stdin)
func nextInt() int {
        sc.Scan()

Kairi

package main

import (
	"fmt"
	"os"
)

func main() {
	// os.Args ([]string)
	fmt.Println(os.Args)

Kairi

package main

import (
	"fmt"
)

func typeCheck(value interface{}) {
	switch t := value.(type) {
	case string:
		fmt.Println(t , "is string")

Kairi

package main

import (
	"io/ioutil"
	"log"
)

func main() {
	message := []byte("Hello World\n")
	err := ioutil.WriteFile("./file_name.txt", message, 0666)