Merge pull request #4888 from influxdb/tsm1dev_log

Enhance tsm1dev logging

tsdb/engine/tsm1/engine.go

@@ -38,7 +38,7 @@ func NewDevEngine(path string, walPath string, opt tsdb.EngineOptions) tsdb.Engi
 
 	e := &DevEngine{
 		path:   path,
-		logger: log.New(os.Stderr, "[tsm1] ", log.LstdFlags),
+		logger: log.New(os.Stderr, "[tsm1dev] ", log.LstdFlags),
 
 		WAL:               w,
 		RotateFileSize:    DefaultRotateFileSize,

tsdb/engine/tsm1/wal.go

@@ -70,7 +70,7 @@ func NewWAL(path string) *WAL {
 		// these options should be overriden by any options in the config
 		LogOutput:   os.Stderr,
 		SegmentSize: DefaultSegmentSize,
-		logger:      log.New(os.Stderr, "[tsm1wal] ", log.LstdFlags),
+		logger:      log.New(os.Stderr, "[tsm1devwal] ", log.LstdFlags),
 		closing:     make(chan struct{}),
 	}
 }