Created
November 27, 2017 12:41
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| package main | |
| import ( | |
| "fmt" | |
| "time" | |
| "github.com/go-kit/kit/log" | |
| "github.com/prometheus/tsdb" | |
| "github.com/prometheus/tsdb/labels" | |
| ) | |
| type myLog struct { | |
| } | |
| func (l *myLog) Log(keyvals ...interface{}) error { | |
| out := "" | |
| for _, a := range keyvals { | |
| out += fmt.Sprintf(" %v", a) | |
| } | |
| fmt.Printf("LOG: %s\n", out) | |
| return nil | |
| } | |
| func readDb() { | |
| var l log.Logger | |
| l = &myLog{} | |
| db, err := tsdb.Open("testdb", l, nil, tsdb.DefaultOptions) | |
| if err != nil { | |
| fmt.Printf("%v\n", err) | |
| return | |
| } | |
| querier, err := db.Querier(int64(0), time.Now().Unix()*1000) | |
| if err != nil { | |
| fmt.Printf("%v\n", err) | |
| return | |
| } | |
| s, err := querier.Select(labels.NewEqualMatcher("a", "b")) | |
| if err != nil { | |
| fmt.Printf("%v\n", err) | |
| return | |
| } | |
| defer querier.Close() | |
| i := 0 | |
| for s.Next() { | |
| series := s.At() | |
| it := series.Iterator() | |
| for it.Next() { | |
| i++ | |
| } | |
| } | |
| fmt.Printf("Sample read %d\n", i) | |
| } | |
| func readDbP(db *tsdb.DB) { | |
| querier, err := db.Querier(int64(0), time.Now().Unix()*1000) | |
| if err != nil { | |
| fmt.Printf("%v\n", err) | |
| return | |
| } | |
| s, err := querier.Select(labels.NewEqualMatcher("a", "b")) | |
| if err != nil { | |
| fmt.Printf("%v\n", err) | |
| return | |
| } | |
| defer querier.Close() | |
| i := 0 | |
| for s.Next() { | |
| series := s.At() | |
| it := series.Iterator() | |
| for it.Next() { | |
| i++ | |
| } | |
| } | |
| fmt.Printf("Sample read %d\n", i) | |
| } | |
| func main() { | |
| var l log.Logger | |
| l = &myLog{} | |
| db, err := tsdb.Open("testdb", l, nil, tsdb.DefaultOptions) | |
| if err != nil { | |
| fmt.Printf("%v\n", err) | |
| } | |
| app := db.Appender() | |
| for i := 0; i < 10; i++ { | |
| t := time.Now().UnixNano() / 1000000 | |
| _, err = app.Add(labels.Labels{{"a", "b"}, {"c", "d"}}, t, 0) | |
| if err != nil { | |
| fmt.Printf("Error is %v\n", err) | |
| } | |
| time.Sleep(2 * time.Millisecond) | |
| } | |
| for i := 0; i < 10; i++ { | |
| t := time.Now().UnixNano() / 1000000 | |
| _, err = app.Add(labels.Labels{{"addr", "127.0.0.1"}, {"env", "prod"}}, t, 0) | |
| if err != nil { | |
| fmt.Printf("Error is %v\n", err) | |
| } | |
| time.Sleep(2 * time.Millisecond) | |
| } | |
| err = app.Commit() | |
| if err != nil { | |
| fmt.Printf("%v\n", err) | |
| } | |
| if err != nil { | |
| panic(err) | |
| } | |
| time.Sleep(6 * time.Millisecond) | |
| fmt.Printf("Read using the same db object that used for appending data\n") | |
| readDbP(db) | |
| db.Close() | |
| fmt.Printf("Read using a fresh db object\n") | |
| readDb() | |
| } |
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