/
stress.go
149 lines (119 loc) · 4.35 KB
/
stress.go
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package main
import "flag"
import "os"
import "log"
import "math"
import "encoding/binary"
import "crypto/rc4"
import "path/filepath"
import "bytes"
import "runtime/pprof"
import "github.com/deroproject/graviton"
var rt = filepath.Join
const keysize uint64 = 64 // in bytes
const valuesize uint64 = 512 // in bytes
var stepsize = flag.Uint64("stepsize", 10, "Every commit will include this much data in MB")
var totalsize = flag.Uint64("totalsize", 500, "Total this much data will be written in MB ( use 0 for infinite )")
var db_directory = flag.String("db_directory", "/tmp", "DB will be created in this path, will be cleared on exit")
var memory = flag.Bool("memory", true, "DB will by default use memory backend (use -memory=false for disk based tests)")
var cpuprofile = flag.String("cpuprofile", "", "write cpu profile to `file`")
var step uint64
var keys_written uint64
func main() {
log.Printf("Graviton DB stress tester")
log.Printf("NOTE: Do not use rotational media")
flag.Parse()
if *cpuprofile != "" {
f, err := os.Create(*cpuprofile)
if err != nil {
log.Fatal("could not create CPU profile: ", err)
}
defer f.Close() // error handling omitted for example
if err := pprof.StartCPUProfile(f); err != nil {
log.Fatal("could not start CPU profile: ", err)
}
defer pprof.StopCPUProfile()
}
if *stepsize < 1 {
*stepsize = 1
}
if *totalsize == 0 {
*totalsize = math.MaxUint64
}
if *stepsize > 512 {
*stepsize = 512
}
if *stepsize > *totalsize {
*stepsize = *totalsize
}
log.Printf("Total Size (to be written): %d MB", *totalsize)
log.Printf("Commit size: %d MB", *stepsize)
var store *graviton.Store
var err error
if *memory {
store, err = graviton.NewMemStore() // create a new DB in RAM
log.Printf("Using memory backend\n")
} else {
store, err = graviton.NewDiskStore(filepath.Join(*db_directory, "graviton_stress_db")) // create a new testdb in "/tmp/testdb"
log.Printf("Using disk backend, db_directory: %s\n", filepath.Join(*db_directory, "graviton_stress_db"))
}
if err != nil {
log.Fatalf("stress db creation err %s", err)
}
gv, err := store.LoadSnapshot(0)
if err != nil {
log.Fatalf("stress db LoadSnapshot err %s", err)
}
write_tree, err := gv.GetTree("stress_testing")
if err != nil {
log.Fatalf("stress db GetTree err %s", err)
}
for i := uint64(0); i < *totalsize / *stepsize; i++ {
log.Printf("Running step %d %f completed total keys %d", i, float64(i*100)/float64(*totalsize / *stepsize), keys_written)
RunStep(store,write_tree)
}
log.Printf("Completed step %d %f completed total keys %d", (*totalsize / *stepsize), float32(100), keys_written)
}
// each step consists of generating pseudorandom data, which is first committed and then verified after each step
func RunStep(store *graviton.Store, write_tree *graviton.Tree) {
var read_tree *graviton.Tree
values_count := (*stepsize * 1024 * 1024 / valuesize) + 1
key_buf := make([]byte, values_count*keysize, values_count*keysize)
value_buf := make([]byte, values_count*valuesize, values_count*valuesize)
var cryptokey, cryptovalue [9]byte
cryptokey[0] = 1
binary.LittleEndian.PutUint64(cryptokey[1:], step)
binary.LittleEndian.PutUint64(cryptovalue[1:], step)
keycipher, _ := rc4.NewCipher(cryptokey[:])
valuecipher, _ := rc4.NewCipher(cryptovalue[:])
keycipher.XORKeyStream(key_buf[:], key_buf[:])
valuecipher.XORKeyStream(value_buf[:], value_buf[:])
for i := uint64(0); i < values_count; i++ {
write_tree.Put(key_buf[i*keysize:(i+1)*keysize], value_buf[i*valuesize:(i+1)*valuesize])
keys_written++
}
write_tree.Commit() //
read_tree = write_tree // use same tree to read write
/*
// now we will load another tree from storage without cache and read everything back and verify
gv_read, err := store.LoadSnapshot(0)
if err != nil {
log.Fatalf("stress db LoadSnapshot err %s", err)
}
read_tree, err := gv_read.GetTree("stress_testing")
if err != nil {
log.Fatalf("stress db GetTree err %s", err)
}
*/
for i := uint64(0); i < values_count; i++ {
if value, err := read_tree.Get(key_buf[i*keysize : (i+1)*keysize]); err == nil {
if bytes.Compare(value, value_buf[i*valuesize:(i+1)*valuesize]) == 0 {
// value macthed nothing to do
} else { // value error
log.Fatalf("value mismatched")
}
} else { // key not existent or other err, stop testing
log.Fatalf("err occured while verifying tree err %s", err)
}
}
}