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Cleanup

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Entire-Checkpoint: ed68d32218ac
This commit is contained in:
Jan Eitzinger
2026-03-24 07:03:46 +01:00
parent 0325d9e866
commit 6f7dda53ee
1 changed files with 0 additions and 63 deletions
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63
pkg/metricstore/walCheckpoint.go
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@@ -434,69 +434,6 @@ func writeWALRecordDirect(w *bufio.Writer, msg *WALMessage) error {
return err return err
} }
// buildWALPayload encodes a WALMessage into a binary payload (without magic/length/CRC).
func buildWALPayload(msg *WALMessage) []byte {
size := 8 + 2 + len(msg.MetricName) + 1 + 4
for _, s := range msg.Selector {
size += 1 + len(s)
}
buf := make([]byte, 0, size)
// Timestamp (8 bytes, little-endian int64)
var ts [8]byte
binary.LittleEndian.PutUint64(ts[:], uint64(msg.Timestamp))
buf = append(buf, ts[:]...)
// Metric name (2-byte length prefix + bytes)
var mLen [2]byte
binary.LittleEndian.PutUint16(mLen[:], uint16(len(msg.MetricName)))
buf = append(buf, mLen[:]...)
buf = append(buf, msg.MetricName...)
// Selector count (1 byte)
buf = append(buf, byte(len(msg.Selector)))
// Selectors (1-byte length prefix + bytes each)
for _, sel := range msg.Selector {
buf = append(buf, byte(len(sel)))
buf = append(buf, sel...)
}
// Value (4 bytes, float32 bit representation)
var val [4]byte
binary.LittleEndian.PutUint32(val[:], math.Float32bits(float32(msg.Value)))
buf = append(buf, val[:]...)
return buf
}
// writeWALRecord appends a binary WAL record to the writer.
// Format: [4B magic][4B payload_len][payload][4B CRC32]
func writeWALRecord(w io.Writer, msg *WALMessage) error {
payload := buildWALPayload(msg)
crc := crc32.ChecksumIEEE(payload)
record := make([]byte, 0, 4+4+len(payload)+4)
var magic [4]byte
binary.LittleEndian.PutUint32(magic[:], walRecordMagic)
record = append(record, magic[:]...)
var pLen [4]byte
binary.LittleEndian.PutUint32(pLen[:], uint32(len(payload)))
record = append(record, pLen[:]...)
record = append(record, payload...)
var crcBytes [4]byte
binary.LittleEndian.PutUint32(crcBytes[:], crc)
record = append(record, crcBytes[:]...)
_, err := w.Write(record)
return err
}
// readWALRecord reads one WAL record from the reader. // readWALRecord reads one WAL record from the reader.
// Returns (nil, nil) on clean EOF. Returns error on data corruption. // Returns (nil, nil) on clean EOF. Returns error on data corruption.
// A CRC mismatch indicates a truncated trailing record (expected on crash). // A CRC mismatch indicates a truncated trailing record (expected on crash).