func TestWALWriter_WritePoints_Single(t *testing.T) {
dir := MustTempDir()
defer os.RemoveAll(dir)
f := MustTempFile(dir)
w := tsm1.NewWALSegmentWriter(f)
p1 := tsm1.NewValue(time.Unix(1, 0), 1.1)
p2 := tsm1.NewValue(time.Unix(1, 0), int64(1))
p3 := tsm1.NewValue(time.Unix(1, 0), true)
p4 := tsm1.NewValue(time.Unix(1, 0), "string")
values := map[string][]tsm1.Value{
"cpu,host=A#!~#float": []tsm1.Value{p1},
"cpu,host=A#!~#int": []tsm1.Value{p2},
"cpu,host=A#!~#bool": []tsm1.Value{p3},
"cpu,host=A#!~#string": []tsm1.Value{p4},
}
entry := &tsm1.WriteWALEntry{
Values: values,
}
if err := w.Write(mustMarshalEntry(entry)); err != nil {
fatal(t, "write points", err)
}
if _, err := f.Seek(0, os.SEEK_SET); err != nil {
fatal(t, "seek", err)
}
r := tsm1.NewWALSegmentReader(f)
if !r.Next() {
t.Fatalf("expected next, got false")
}
we, err := r.Read()
if err != nil {
fatal(t, "read entry", err)
}
e, ok := we.(*tsm1.WriteWALEntry)
if !ok {
t.Fatalf("expected WriteWALEntry: got %#v", e)
}
for k, v := range e.Values {
for i, vv := range v {
if got, exp := vv.String(), values[k][i].String(); got != exp {
t.Fatalf("points mismatch: got %v, exp %v", got, exp)
}
}
}
if n := r.Count(); n != MustReadFileSize(f) {
t.Fatalf("wrong count of bytes read, got %d, exp %d", n, MustReadFileSize(f))
}
}
func TestWALWriter_WritePoints_LargeBatch(t *testing.T) {
dir := MustTempDir()
defer os.RemoveAll(dir)
f := MustTempFile(dir)
w := tsm1.NewWALSegmentWriter(f)
var points []tsm1.Value
for i := 0; i < 100000; i++ {
points = append(points, tsm1.NewValue(time.Unix(int64(i), 0), int64(1)))
}
values := map[string][]tsm1.Value{
"cpu,host=A,server=01,foo=bar,tag=really-long#!~#float": points,
"mem,host=A,server=01,foo=bar,tag=really-long#!~#float": points,
}
entry := &tsm1.WriteWALEntry{
Values: values,
}
if err := w.Write(mustMarshalEntry(entry)); err != nil {
fatal(t, "write points", err)
}
if _, err := f.Seek(0, os.SEEK_SET); err != nil {
fatal(t, "seek", err)
}
r := tsm1.NewWALSegmentReader(f)
if !r.Next() {
t.Fatalf("expected next, got false")
}
we, err := r.Read()
if err != nil {
fatal(t, "read entry", err)
}
e, ok := we.(*tsm1.WriteWALEntry)
if !ok {
t.Fatalf("expected WriteWALEntry: got %#v", e)
}
for k, v := range e.Values {
for i, vv := range v {
if got, exp := vv.String(), values[k][i].String(); got != exp {
t.Fatalf("points mismatch: got %v, exp %v", got, exp)
}
}
}
if n := r.Count(); n != MustReadFileSize(f) {
t.Fatalf("wrong count of bytes read, got %d, exp %d", n, MustReadFileSize(f))
}
}
func TestWALWriter_Corrupt(t *testing.T) {
dir := MustTempDir()
defer os.RemoveAll(dir)
f := MustTempFile(dir)
w := tsm1.NewWALSegmentWriter(f)
corruption := []byte{1, 4, 0, 0, 0}
p1 := tsm1.NewValue(time.Unix(1, 0), 1.1)
values := map[string][]tsm1.Value{
"cpu,host=A#!~#float": []tsm1.Value{p1},
}
entry := &tsm1.WriteWALEntry{
Values: values,
}
if err := w.Write(mustMarshalEntry(entry)); err != nil {
fatal(t, "write points", err)
}
// Write some random bytes to the file to simulate corruption.
if _, err := f.Write(corruption); err != nil {
fatal(t, "corrupt WAL segment", err)
}
// Create the WAL segment reader.
if _, err := f.Seek(0, os.SEEK_SET); err != nil {
fatal(t, "seek", err)
}
r := tsm1.NewWALSegmentReader(f)
// Try to decode two entries.
if !r.Next() {
t.Fatalf("expected next, got false")
}
if _, err := r.Read(); err != nil {
fatal(t, "read entry", err)
}
if !r.Next() {
t.Fatalf("expected next, got false")
}
if _, err := r.Read(); err == nil {
fatal(t, "read entry did not return err", nil)
}
// Count should only return size of valid data.
expCount := MustReadFileSize(f) - int64(len(corruption))
if n := r.Count(); n != expCount {
t.Fatalf("wrong count of bytes read, got %d, exp %d", n, expCount)
}
}
func MustWALSegment(dir string, entries []tsm1.WALEntry) *tsm1.WALSegmentReader {
f := MustTempFile(dir)
w := tsm1.NewWALSegmentWriter(f)
for _, e := range entries {
if err := w.Write(mustMarshalEntry(e)); err != nil {
panic(fmt.Sprintf("write WAL entry: %v", err))
}
}
if _, err := f.Seek(0, os.SEEK_SET); err != nil {
panic(fmt.Sprintf("seek WAL: %v", err))
}
return tsm1.NewWALSegmentReader(f)
}
func TestWALWriter_WriteDelete_Single(t *testing.T) {
dir := MustTempDir()
defer os.RemoveAll(dir)
f := MustTempFile(dir)
w := tsm1.NewWALSegmentWriter(f)
entry := &tsm1.DeleteWALEntry{
Keys: []string{"cpu"},
}
if err := w.Write(mustMarshalEntry(entry)); err != nil {
fatal(t, "write points", err)
}
if _, err := f.Seek(0, os.SEEK_SET); err != nil {
fatal(t, "seek", err)
}
r := tsm1.NewWALSegmentReader(f)
if !r.Next() {
t.Fatalf("expected next, got false")
}
we, err := r.Read()
if err != nil {
fatal(t, "read entry", err)
}
e, ok := we.(*tsm1.DeleteWALEntry)
if !ok {
t.Fatalf("expected WriteWALEntry: got %#v", e)
}
if got, exp := len(e.Keys), len(entry.Keys); got != exp {
t.Fatalf("key length mismatch: got %v, exp %v", got, exp)
}
if got, exp := e.Keys[0], entry.Keys[0]; got != exp {
t.Fatalf("key mismatch: got %v, exp %v", got, exp)
}
}
func BenchmarkWALSegmentReader(b *testing.B) {
points := map[string][]tsm1.Value{}
for i := 0; i < 5000; i++ {
k := "cpu,host=A#!~#value"
points[k] = append(points[k], tsm1.NewValue(time.Unix(int64(i), 0), 1.1))
}
dir := MustTempDir()
defer os.RemoveAll(dir)
f := MustTempFile(dir)
w := tsm1.NewWALSegmentWriter(f)
write := &tsm1.WriteWALEntry{
Values: points,
}
for i := 0; i < 100; i++ {
if err := w.Write(mustMarshalEntry(write)); err != nil {
b.Fatalf("unexpected error writing entry: %v", err)
}
}
r := tsm1.NewWALSegmentReader(f)
b.ResetTimer()
for i := 0; i < b.N; i++ {
b.StopTimer()
f.Seek(0, os.SEEK_SET)
b.StartTimer()
for r.Next() {
_, err := r.Read()
if err != nil {
b.Fatalf("unexpected error reading entry: %v", err)
}
}
}
}
func TestWALWriter_WritePointsDelete_Multiple(t *testing.T) {
dir := MustTempDir()
defer os.RemoveAll(dir)
f := MustTempFile(dir)
w := tsm1.NewWALSegmentWriter(f)
p1 := tsm1.NewValue(time.Unix(1, 0), true)
values := map[string][]tsm1.Value{
"cpu,host=A#!~#value": []tsm1.Value{p1},
}
writeEntry := &tsm1.WriteWALEntry{
Values: values,
}
if err := w.Write(mustMarshalEntry(writeEntry)); err != nil {
fatal(t, "write points", err)
}
// Write the delete entry
deleteEntry := &tsm1.DeleteWALEntry{
Keys: []string{"cpu,host=A#!~value"},
}
if err := w.Write(mustMarshalEntry(deleteEntry)); err != nil {
fatal(t, "write points", err)
}
// Seek back to the beinning of the file for reading
if _, err := f.Seek(0, os.SEEK_SET); err != nil {
fatal(t, "seek", err)
}
r := tsm1.NewWALSegmentReader(f)
// Read the write points first
if !r.Next() {
t.Fatalf("expected next, got false")
}
we, err := r.Read()
if err != nil {
fatal(t, "read entry", err)
}
e, ok := we.(*tsm1.WriteWALEntry)
if !ok {
t.Fatalf("expected WriteWALEntry: got %#v", e)
}
for k, v := range e.Values {
if got, exp := len(v), len(values[k]); got != exp {
t.Fatalf("values length mismatch: got %v, exp %v", got, exp)
}
for i, vv := range v {
if got, exp := vv.String(), values[k][i].String(); got != exp {
t.Fatalf("points mismatch: got %v, exp %v", got, exp)
}
}
}
// Read the delete second
if !r.Next() {
t.Fatalf("expected next, got false")
}
we, err = r.Read()
if err != nil {
fatal(t, "read entry", err)
}
de, ok := we.(*tsm1.DeleteWALEntry)
if !ok {
t.Fatalf("expected DeleteWALEntry: got %#v", e)
}
if got, exp := len(de.Keys), len(deleteEntry.Keys); got != exp {
t.Fatalf("key length mismatch: got %v, exp %v", got, exp)
}
if got, exp := de.Keys[0], deleteEntry.Keys[0]; got != exp {
t.Fatalf("key mismatch: got %v, exp %v", got, exp)
}
}
func TestWALWriter_WritePoints_Multiple(t *testing.T) {
dir := MustTempDir()
defer os.RemoveAll(dir)
f := MustTempFile(dir)
w := tsm1.NewWALSegmentWriter(f)
p1 := tsm1.NewValue(time.Unix(1, 0), int64(1))
p2 := tsm1.NewValue(time.Unix(1, 0), int64(2))
exp := []struct {
key string
values []tsm1.Value
}{
{"cpu,host=A#!~#value", []tsm1.Value{p1}},
{"cpu,host=B#!~#value", []tsm1.Value{p2}},
}
for _, v := range exp {
entry := &tsm1.WriteWALEntry{
Values: map[string][]tsm1.Value{v.key: v.values},
}
if err := w.Write(mustMarshalEntry(entry)); err != nil {
fatal(t, "write points", err)
}
}
// Seek back to the beinning of the file for reading
if _, err := f.Seek(0, os.SEEK_SET); err != nil {
fatal(t, "seek", err)
}
r := tsm1.NewWALSegmentReader(f)
for _, ep := range exp {
if !r.Next() {
t.Fatalf("expected next, got false")
}
we, err := r.Read()
if err != nil {
fatal(t, "read entry", err)
}
e, ok := we.(*tsm1.WriteWALEntry)
if !ok {
t.Fatalf("expected WriteWALEntry: got %#v", e)
}
for k, v := range e.Values {
if got, exp := k, ep.key; got != exp {
t.Fatalf("key mismatch. got %v, exp %v", got, exp)
}
if got, exp := len(v), len(ep.values); got != exp {
t.Fatalf("values length mismatch: got %v, exp %v", got, exp)
}
for i, vv := range v {
if got, exp := vv.String(), ep.values[i].String(); got != exp {
t.Fatalf("points mismatch: got %v, exp %v", got, exp)
}
}
}
}
if n := r.Count(); n != MustReadFileSize(f) {
t.Fatalf("wrong count of bytes read, got %d, exp %d", n, MustReadFileSize(f))
}
}
func (cmd *Command) writeWALFiles(w io.WriteCloser, files []string, key string) error {
fmt.Fprintln(w, "# writing wal data")
// we need to make sure we write the same order that the wal received the data
sort.Strings(files)
var once sync.Once
warn := func() {
msg := fmt.Sprintf(`WARNING: detected deletes in wal file.
Some series for %q may be brought back by replaying this data.
To resolve, you can either let the shard snapshot prior to exporting the data
or manually editing the exported file.
`, key)
fmt.Fprintln(cmd.Stderr, msg)
}
// use a function here to close the files in the defers and not let them accumulate in the loop
write := func(f string) error {
file, err := os.OpenFile(f, os.O_RDONLY, 0600)
if err != nil {
return fmt.Errorf("%v", err)
}
defer file.Close()
reader := tsm1.NewWALSegmentReader(file)
defer reader.Close()
for reader.Next() {
entry, err := reader.Read()
if err != nil {
n := reader.Count()
fmt.Fprintf(os.Stderr, "file %s corrupt at position %d", file.Name(), n)
break
}
switch t := entry.(type) {
case *tsm1.DeleteWALEntry:
once.Do(warn)
continue
case *tsm1.DeleteRangeWALEntry:
once.Do(warn)
continue
case *tsm1.WriteWALEntry:
var pairs string
for key, values := range t.Values {
measurement, field := tsm1.SeriesAndFieldFromCompositeKey([]byte(key))
for _, value := range values {
if (value.UnixNano() < cmd.startTime) || (value.UnixNano() > cmd.endTime) {
continue
}
switch value.Value().(type) {
case float64:
pairs = field + "=" + fmt.Sprintf("%v", value.Value())
case int64:
pairs = field + "=" + fmt.Sprintf("%vi", value.Value())
case bool:
pairs = field + "=" + fmt.Sprintf("%v", value.Value())
case string:
pairs = field + "=" + fmt.Sprintf("%q", models.EscapeStringField(fmt.Sprintf("%s", value.Value())))
default:
pairs = field + "=" + fmt.Sprintf("%v", value.Value())
}
fmt.Fprintln(w, string(measurement), pairs, value.UnixNano())
}
}
}
}
return nil
}
for _, f := range files {
if err := write(f); err != nil {
return err
}
}
return nil
}