wp

database/tmp

@@ -0,0 +1,93 @@
+// IN APPEND MEASURES
+// if len(s.buffer) < storage.DataPageSize {
+// 	// allocate bigger buffer
+// 	buf, databuf := growBuffers(growBuffersIn{
+// 		databuf:       s.buffer,
+// 		tSize:         timestamps.Size(),
+// 		vSize:         values.Size(),
+// 		requiredSpace: totalRequiredSpace,
+// 	})
+
+// 	s.buffer = buf
+// 	// replace buffer in timestamps and values
+// 	timestamps.Rotate(databuf) // fix pos
+// 	values.Rotate(databuf)     // fix pos
+// } else {
+
+// IN DATABASE
+
+// FIX
+// УВАГА!
+// Якщо буфер metric.buffer < розміру сторінки - для timestamps доступний весь буфер.
+// Якщо буфер досяг розміру сторінки - в timestamps я передаю buffer[:DataPagePayloadSize]
+
+// var dataBufferSizes = []int{
+// 	1024,
+// 	2048,
+// 	4096,
+// 	8192,
+// }
+
+// func calculateDataBufferSize(payloadSize int) int {
+// 	for _, bufferSize := range dataBufferSizes {
+// 		if payloadSize <= bufferSize {
+// 			return bufferSize
+// 		}
+// 	}
+// 	return storage.DataPageSize
+// }
+
+// func allocateBuffers(requiredSpace int) (buf, databuf []byte) {
+// 	bufferSize := calculateDataBufferSize(requiredSpace)
+// 	buf = make([]byte, bufferSize)
+// 	if bufferSize == storage.DataPageSize {
+// 		databuf = buf[:storage.DataPagePayloadSize]
+// 	} else {
+// 		databuf = buf
+// 	}
+// 	return
+// }
+
+// // src - databuf
+// type growBuffersIn struct {
+// 	databuf       []byte
+// 	tSize         int
+// 	vSize         int
+// 	requiredSpace int
+// }
+
+// func growBuffers(in growBuffersIn) (buf, databuf []byte) {
+// 	buf, databuf = allocateBuffers(in.requiredSpace)
+// 	copy(databuf[len(databuf)-in.tSize:], in.databuf[len(in.databuf)-in.tSize:])
+// 	copy(databuf, in.databuf[:in.vSize])
+// 	return
+// }
+
+// type shrinkBufferIn struct {
+// 	Buffer         []byte
+// 	TimestampsSize int
+// 	ValuesSize     int
+// 	NewBufferSize  int
+// }
+
+// func shrinkBuffer(in shrinkBufferIn) []byte {
+// 	buf := make([]byte, in.NewBufferSize)
+// 	copy(buf, in.Buffer[:in.ValuesSize])
+// 	copy(buf[:len(buf)-in.TimestampsSize], in.Buffer[len(in.Buffer)-in.TimestampsSize:])
+// 	return buf
+// }
+
+// IN REPLAY_METRIC.TO_METRIC
+
+// var (
+// 	requiredSpace = s.tSize + s.vSize
+// )
+// bufferSize := calculateDataBufferSize(requiredSpace)
+// if len(s.buf) > bufferSize {
+// 	s.buf = shrinkBuffer(shrinkBufferIn{
+// 		Buffer:         s.buf,
+// 		TimestampsSize: s.tSize,
+// 		ValuesSize:     s.vSize,
+// 		NewBufferSize:  bufferSize,
+// 	})
+// }