// Tests that duplicate point values are merged. There is only one case
// where this could happen and that is when a compaction completed and we replace
// the old TSM file with a new one and we crash just before deleting the old file.
// No data is lost but the same point time/value would exist in two files until
// compaction corrects it.
func TestTSMKeyIterator_Duplicate(t *testing.T) {
dir := MustTempDir()
defer os.RemoveAll(dir)
v1 := tsm1.NewValue(1, int64(1))
v2 := tsm1.NewValue(1, int64(2))
writes1 := map[string][]tsm1.Value{
"cpu,host=A#!~#value": []tsm1.Value{v1},
}
r1 := MustTSMReader(dir, 1, writes1)
writes2 := map[string][]tsm1.Value{
"cpu,host=A#!~#value": []tsm1.Value{v2},
}
r2 := MustTSMReader(dir, 2, writes2)
iter, err := tsm1.NewTSMKeyIterator(1, false, r1, r2)
if err != nil {
t.Fatalf("unexpected error creating WALKeyIterator: %v", err)
}
var readValues bool
for iter.Next() {
key, _, _, block, err := iter.Read()
if err != nil {
t.Fatalf("unexpected error read: %v", err)
}
values, err := tsm1.DecodeBlock(block, nil)
if err != nil {
t.Fatalf("unexpected error decode: %v", err)
}
if got, exp := key, "cpu,host=A#!~#value"; got != exp {
t.Fatalf("key mismatch: got %v, exp %v", got, exp)
}
if got, exp := len(values), 1; got != exp {
t.Fatalf("values length mismatch: got %v, exp %v", got, exp)
}
readValues = true
assertValueEqual(t, values[0], v2)
}
if !readValues {
t.Fatalf("failed to read any values")
}
}
// Tests that a single TSM file can be read and iterated over
func TestTSMKeyIterator_Chunked(t *testing.T) {
t.Skip("fixme")
dir := MustTempDir()
defer os.RemoveAll(dir)
v0 := tsm1.NewValue(1, 1.1)
v1 := tsm1.NewValue(2, 2.1)
writes := map[string][]tsm1.Value{
"cpu,host=A#!~#value": []tsm1.Value{v0, v1},
}
r := MustTSMReader(dir, 1, writes)
iter, err := tsm1.NewTSMKeyIterator(1, false, r)
if err != nil {
t.Fatalf("unexpected error creating WALKeyIterator: %v", err)
}
var readValues bool
var chunk int
for iter.Next() {
key, _, _, block, err := iter.Read()
if err != nil {
t.Fatalf("unexpected error read: %v", err)
}
values, err := tsm1.DecodeBlock(block, nil)
if err != nil {
t.Fatalf("unexpected error decode: %v", err)
}
if got, exp := key, "cpu,host=A#!~#value"; got != exp {
t.Fatalf("key mismatch: got %v, exp %v", got, exp)
}
if got, exp := len(values), len(writes); got != exp {
t.Fatalf("values length mismatch: got %v, exp %v", got, exp)
}
for _, v := range values {
readValues = true
assertValueEqual(t, v, writes["cpu,host=A#!~#value"][chunk])
}
chunk++
}
if !readValues {
t.Fatalf("failed to read any values")
}
}
// Tests that deleted keys are not seen during iteration with
// TSM files.
func TestTSMKeyIterator_MultipleKeysDeleted(t *testing.T) {
dir := MustTempDir()
defer os.RemoveAll(dir)
v1 := tsm1.NewValue(2, int64(1))
points1 := map[string][]tsm1.Value{
"cpu,host=A#!~#value": []tsm1.Value{v1},
}
r1 := MustTSMReader(dir, 1, points1)
if e := r1.Delete([]string{"cpu,host=A#!~#value"}); nil != e {
t.Fatal(e)
}
v2 := tsm1.NewValue(1, float64(1))
v3 := tsm1.NewValue(1, float64(1))
points2 := map[string][]tsm1.Value{
"cpu,host=A#!~#count": []tsm1.Value{v2},
"cpu,host=B#!~#value": []tsm1.Value{v3},
}
r2 := MustTSMReader(dir, 2, points2)
r2.Delete([]string{"cpu,host=A#!~#count"})
iter, err := tsm1.NewTSMKeyIterator(1, false, r1, r2)
if err != nil {
t.Fatalf("unexpected error creating WALKeyIterator: %v", err)
}
var readValues bool
var data = []struct {
key string
value tsm1.Value
}{
{"cpu,host=B#!~#value", v3},
}
for iter.Next() {
key, _, _, block, err := iter.Read()
if err != nil {
t.Fatalf("unexpected error read: %v", err)
}
values, err := tsm1.DecodeBlock(block, nil)
if err != nil {
t.Fatalf("unexpected error decode: %v", err)
}
if got, exp := key, data[0].key; got != exp {
t.Fatalf("key mismatch: got %v, exp %v", got, exp)
}
if got, exp := len(values), 1; got != exp {
t.Fatalf("values length mismatch: got %v, exp %v", got, exp)
}
readValues = true
assertValueEqual(t, values[0], data[0].value)
data = data[1:]
}
if !readValues {
t.Fatalf("failed to read any values")
}
}