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test_linux_ext4.go
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/
test_linux_ext4.go
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// Create 200k files in one directory vs 200k files in 100 separate directories
// See if speed of accessing files is affected
package main
import (
"fmt"
"log"
"os"
"time"
"math/rand"
"github.com/1f604/util"
)
func main() {
// Now time read and write times
fmt.Println("Now creating 100 x 10kb files in a small directory.")
start := time.Now()
for j := 0; j < 100; j++ {
num1 := rand.Intn(100)
num2 := rand.Intn(2000)
f, err := os.Create("/tmp/dir" + util.Int64_to_string(int64(num1)) + "/test" + util.Int64_to_string(int64(num2)) + ".txt")
if err != nil {
log.Fatal(err)
}
if err := f.Truncate(1e5); err != nil {
log.Fatal(err)
}
}
fmt.Println("Time taken:", time.Now().Sub(start))
fmt.Println("Now reading 1000 random 10kb files in a small directory.")
start = time.Now()
list := [][]byte{}
for j := 0; j < 1000; j++ {
num1 := rand.Intn(100)
num2 := rand.Intn(2000)
contents, err := os.ReadFile("/tmp/dir" + util.Int64_to_string(int64(num1)) + "/" + util.Int64_to_string(int64(num2)) + ".txt")
if err != nil {
log.Fatal(err)
}
list = append(list, contents)
}
fmt.Println("Time taken:", time.Now().Sub(start))
fmt.Println("Now creating 100 x 10kb files in a big directory.")
start = time.Now()
for j := 0; j < 100; j++ {
f, err := os.Create("/tmp/bigdir/test" + util.Int64_to_string(int64(j)) + ".txt")
if err != nil {
log.Fatal(err)
}
if err := f.Truncate(1e5); err != nil {
log.Fatal(err)
}
}
fmt.Println("Time taken:", time.Now().Sub(start))
fmt.Println("Now reading 1000 random 10kb files in a big directory.")
start = time.Now()
for j := 0; j < 1000; j++ {
num := rand.Intn(200000)
contents, err := os.ReadFile("/tmp/bigdir/" + util.Int64_to_string(int64(num)) + ".txt")
if err != nil {
log.Fatal(err)
}
list = append(list, contents)
}
fmt.Println("Time taken:", time.Now().Sub(start))
}