Example #1
0
func copySeqCache(
	e engine.ReadWriter,
	ms *enginepb.MVCCStats,
	srcID, dstID roachpb.RangeID,
	keyMin, keyMax engine.MVCCKey,
) (int, error) {
	var scratch [64]byte
	var count int
	var meta enginepb.MVCCMetadata
	// TODO(spencer): look into making this an MVCCIteration and writing
	// the values using MVCC so we can avoid the ugliness of updating
	// the MVCCStats by hand below.
	err := e.Iterate(keyMin, keyMax,
		func(kv engine.MVCCKeyValue) (bool, error) {
			// Decode the key, skipping on error. Otherwise, write it to the
			// corresponding key in the new cache.
			txnID, err := decodeAbortCacheMVCCKey(kv.Key, scratch[:0])
			if err != nil {
				return false, errors.Errorf("could not decode an abort cache key %s: %s", kv.Key, err)
			}
			key := keys.AbortCacheKey(dstID, txnID)
			encKey := engine.MakeMVCCMetadataKey(key)
			// Decode the MVCCMetadata value.
			if err := proto.Unmarshal(kv.Value, &meta); err != nil {
				return false, errors.Errorf("could not decode mvcc metadata %s [% x]: %s", kv.Key, kv.Value, err)
			}
			value := engine.MakeValue(meta)
			value.ClearChecksum()
			value.InitChecksum(key)
			meta.RawBytes = value.RawBytes

			keyBytes, valBytes, err := engine.PutProto(e, encKey, &meta)
			if err != nil {
				return false, err
			}
			count++
			if ms != nil {
				ms.SysBytes += keyBytes + valBytes
				ms.SysCount++
			}
			return false, nil
		})
	return count, err
}
Example #2
0
func (r *rocksDBIterator) ComputeStats(start, end MVCCKey, nowNanos int64) (enginepb.MVCCStats, error) {
	result := C.MVCCComputeStats(r.iter, goToCKey(start), goToCKey(end), C.int64_t(nowNanos))
	ms := enginepb.MVCCStats{}
	if err := statusToError(result.status); err != nil {
		return ms, err
	}
	ms.LiveBytes = int64(result.live_bytes)
	ms.KeyBytes = int64(result.key_bytes)
	ms.ValBytes = int64(result.val_bytes)
	ms.IntentBytes = int64(result.intent_bytes)
	ms.LiveCount = int64(result.live_count)
	ms.KeyCount = int64(result.key_count)
	ms.ValCount = int64(result.val_count)
	ms.IntentCount = int64(result.intent_count)
	ms.IntentAge = int64(result.intent_age)
	ms.GCBytesAge = int64(result.gc_bytes_age)
	ms.SysBytes = int64(result.sys_bytes)
	ms.SysCount = int64(result.sys_count)
	ms.LastUpdateNanos = nowNanos
	return ms, nil
}