func TestCacheKeyIterator_Chunked(t *testing.T) {
v0 := tsm1.NewValue(time.Unix(1, 0).UTC(), 1.0)
v1 := tsm1.NewValue(time.Unix(2, 0).UTC(), 2.0)
writes := map[string][]tsm1.Value{
"cpu,host=A#!~#value": []tsm1.Value{v0, v1},
}
c := tsm1.NewCache(0)
for k, v := range writes {
if err := c.Write(k, v); err != nil {
t.Fatalf("failed to write key foo to cache: %s", err.Error())
}
}
iter := tsm1.NewCacheKeyIterator(c, 1)
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), 1; 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")
}
}
func TestKeyIterator_Cache_Single(t *testing.T) {
v0 := tsm1.NewValue(time.Unix(1, 0).UTC(), 1.0)
writes := map[string][]tsm1.Value{
"cpu,host=A#!~#value": []tsm1.Value{v0},
}
c := tsm1.NewCache(0)
for k, v := range writes {
if err := c.Write(k, v); err != nil {
t.Fatalf("failed to write key foo to cache: %s", err.Error())
}
}
iter := tsm1.NewCacheKeyIterator(c)
var readValues bool
for iter.Next() {
key, values, err := iter.Read()
if err != nil {
t.Fatalf("unexpected error read: %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, v0)
}
}
if !readValues {
t.Fatalf("failed to read any values")
}
}
// Tests compacting a Cache snapshot into a single TSM file
func TestCompactor_Snapshot(t *testing.T) {
dir := MustTempDir()
defer os.RemoveAll(dir)
v1 := tsm1.NewValue(time.Unix(1, 0), float64(1))
v2 := tsm1.NewValue(time.Unix(1, 0), float64(1))
v3 := tsm1.NewValue(time.Unix(2, 0), float64(2))
points1 := map[string][]tsm1.Value{
"cpu,host=A#!~#value": []tsm1.Value{v1},
"cpu,host=B#!~#value": []tsm1.Value{v2, v3},
}
c := tsm1.NewCache(0)
for k, v := range points1 {
if err := c.Write(k, v); err != nil {
t.Fatalf("failed to write key foo to cache: %s", err.Error())
}
}
compactor := &tsm1.Compactor{
Dir: dir,
FileStore: &fakeFileStore{},
}
files, err := compactor.WriteSnapshot(c)
if err != nil {
t.Fatalf("unexpected error writing snapshot: %v", err)
}
if got, exp := len(files), 1; got != exp {
t.Fatalf("files length mismatch: got %v, exp %v", got, exp)
}
r := MustOpenTSMReader(files[0])
keys := r.Keys()
if got, exp := len(keys), 2; got != exp {
t.Fatalf("keys length mismatch: got %v, exp %v", got, exp)
}
var data = []struct {
key string
points []tsm1.Value
}{
{"cpu,host=A#!~#value", []tsm1.Value{v1}},
{"cpu,host=B#!~#value", []tsm1.Value{v2, v3}},
}
for _, p := range data {
values, err := r.ReadAll(p.key)
if err != nil {
t.Fatalf("unexpected error reading: %v", err)
}
if got, exp := len(values), len(p.points); got != exp {
t.Fatalf("values length mismatch: got %v, exp %v", got, exp)
}
for i, point := range p.points {
assertValueEqual(t, values[i], point)
}
}
}