// benchmarkWritePoints benchmarks writing new series to a shard.
// mCnt - measurement count
// tkCnt - tag key count
// tvCnt - tag value count (values per tag)
// pntCnt - points per series. # of series = mCnt * (tvCnt ^ tkCnt)
func benchmarkWritePoints(b *testing.B, mCnt, tkCnt, tvCnt, pntCnt int) {
// Generate test series (measurements + unique tag sets).
series := genTestSeries(mCnt, tkCnt, tvCnt)
// Create index for the shard to use.
index := tsdb.NewDatabaseIndex()
// Generate point data to write to the shard.
points := []tsdb.Point{}
for _, s := range series {
for val := 0.0; val < float64(pntCnt); val++ {
p := tsdb.NewPoint(s.Measurement, s.Series.Tags, map[string]interface{}{"value": val}, time.Now())
points = append(points, p)
}
}
// Stop & reset timers and mem-stats before the main benchmark loop.
b.StopTimer()
b.ResetTimer()
// Run the benchmark loop.
for n := 0; n < b.N; n++ {
tmpDir, _ := ioutil.TempDir("", "shard_test")
tmpShard := path.Join(tmpDir, "shard")
shard := tsdb.NewShard(index, tmpShard, tsdb.NewEngineOptions())
shard.Open()
b.StartTimer()
// Call the function being benchmarked.
chunkedWrite(shard, points)
b.StopTimer()
shard.Close()
os.RemoveAll(tmpDir)
}
}
func mustCreateShard(dir string) *tsdb.Shard {
tmpShard := path.Join(dir, "shard")
index := tsdb.NewDatabaseIndex()
sh := tsdb.NewShard(index, tmpShard, tsdb.NewEngineOptions())
if err := sh.Open(); err != nil {
panic(fmt.Sprintf("error opening shard: %s", err.Error()))
}
return sh
}
func TestShardWriteAddNewField(t *testing.T) {
tmpDir, _ := ioutil.TempDir("", "shard_test")
defer os.RemoveAll(tmpDir)
tmpShard := path.Join(tmpDir, "shard")
index := tsdb.NewDatabaseIndex()
sh := tsdb.NewShard(index, tmpShard, tsdb.NewEngineOptions())
if err := sh.Open(); err != nil {
t.Fatalf("error openeing shard: %s", err.Error())
}
defer sh.Close()
pt := tsdb.NewPoint(
"cpu",
map[string]string{"host": "server"},
map[string]interface{}{"value": 1.0},
time.Unix(1, 2),
)
err := sh.WritePoints([]tsdb.Point{pt})
if err != nil {
t.Fatalf(err.Error())
}
pt = tsdb.NewPoint(
"cpu",
map[string]string{"host": "server"},
map[string]interface{}{"value": 1.0, "value2": 2.0},
time.Unix(1, 2),
)
err = sh.WritePoints([]tsdb.Point{pt})
if err != nil {
t.Fatalf(err.Error())
}
if !reflect.DeepEqual(index.Names(), []string{"cpu"}) {
t.Fatalf("measurement names in shard didn't match")
}
if index.SeriesN() != 1 {
t.Fatalf("series wasn't in index")
}
seriesTags := index.Series(string(pt.Key())).Tags
if len(seriesTags) != len(pt.Tags()) || pt.Tags()["host"] != seriesTags["host"] {
t.Fatalf("tags weren't properly saved to series index: %v, %v", pt.Tags(), seriesTags)
}
if !reflect.DeepEqual(index.Measurement("cpu").TagKeys(), []string{"host"}) {
t.Fatalf("tag key wasn't saved to measurement index")
}
if len(index.Measurement("cpu").FieldNames()) != 2 {
t.Fatalf("field names wasn't saved to measurement index")
}
}
// Ensure the shard will automatically flush the WAL after a threshold has been reached.
func TestShard_Autoflush_FlushInterval(t *testing.T) {
path, _ := ioutil.TempDir("", "shard_test")
defer os.RemoveAll(path)
// Open shard with a high size threshold, small time threshold.
sh := tsdb.NewShard(tsdb.NewDatabaseIndex(), filepath.Join(path, "shard"), tsdb.EngineOptions{
MaxWALSize: 10 * 1024 * 1024, // 10MB
WALFlushInterval: 100 * time.Millisecond,
WALPartitionFlushDelay: 1 * time.Millisecond,
})
if err := sh.Open(); err != nil {
t.Fatal(err)
}
defer sh.Close()
// Write some points.
for i := 0; i < 100; i++ {
if err := sh.WritePoints([]tsdb.Point{tsdb.NewPoint(
fmt.Sprintf("cpu%d", i),
map[string]string{"host": "server"},
map[string]interface{}{"value": 1.0},
time.Unix(1, 2),
)}); err != nil {
t.Fatal(err)
}
}
// Wait for time-based flush.
time.Sleep(100 * time.Millisecond)
// Make sure we have series buckets created outside the WAL.
if n, err := sh.SeriesCount(); err != nil {
t.Fatal(err)
} else if n < 10 {
t.Fatalf("not enough series, expected at least 10, got %d", n)
}
}
func TestShardWriteAndIndex(t *testing.T) {
tmpDir, _ := ioutil.TempDir("", "shard_test")
defer os.RemoveAll(tmpDir)
tmpShard := path.Join(tmpDir, "shard")
index := tsdb.NewDatabaseIndex()
sh := tsdb.NewShard(index, tmpShard, tsdb.NewEngineOptions())
if err := sh.Open(); err != nil {
t.Fatalf("error openeing shard: %s", err.Error())
}
pt := tsdb.NewPoint(
"cpu",
map[string]string{"host": "server"},
map[string]interface{}{"value": 1.0},
time.Unix(1, 2),
)
err := sh.WritePoints([]tsdb.Point{pt})
if err != nil {
t.Fatalf(err.Error())
}
pt.SetTime(time.Unix(2, 3))
err = sh.WritePoints([]tsdb.Point{pt})
if err != nil {
t.Fatalf(err.Error())
}
validateIndex := func() {
if !reflect.DeepEqual(index.Names(), []string{"cpu"}) {
t.Fatalf("measurement names in shard didn't match")
}
if index.SeriesN() != 1 {
t.Fatalf("series wasn't in index")
}
seriesTags := index.Series(string(pt.Key())).Tags
if len(seriesTags) != len(pt.Tags()) || pt.Tags()["host"] != seriesTags["host"] {
t.Fatalf("tags weren't properly saved to series index: %v, %v", pt.Tags(), seriesTags)
}
if !reflect.DeepEqual(index.Measurement("cpu").TagKeys(), []string{"host"}) {
t.Fatalf("tag key wasn't saved to measurement index")
}
}
validateIndex()
// ensure the index gets loaded after closing and opening the shard
sh.Close()
index = tsdb.NewDatabaseIndex()
sh = tsdb.NewShard(index, tmpShard, tsdb.NewEngineOptions())
if err := sh.Open(); err != nil {
t.Fatalf("error openeing shard: %s", err.Error())
}
validateIndex()
// and ensure that we can still write data
pt.SetTime(time.Unix(2, 6))
err = sh.WritePoints([]tsdb.Point{pt})
if err != nil {
t.Fatalf(err.Error())
}
}