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ingestor only mode fast path #291

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ingestor only mode fast path #291

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22 changes: 22 additions & 0 deletions pkg/receive/handler.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1248,6 +1248,28 @@ func (h *Handler) RemoteWrite(ctx context.Context, r *storepb.WriteRequest) (*st
span, ctx := tracing.StartSpan(ctx, "receive_grpc")
defer span.Finish()

// Fast path for IngestorOnly mode: write directly to local TSDB.
// This skips distributeTimeseriesToReplicas and sendLocalWrite since
// the Router already determined this data belongs to this node.
if h.receiverMode == IngestorOnly {
err := h.writer.Write(ctx, r.Tenant, r.Timeseries)
if err != nil {
level.Debug(h.logger).Log("msg", "failed to write to local TSDB", "err", err)
}
switch cause := errors.Cause(err); cause {
case nil:
return &storepb.WriteResponse{}, nil
default:
if isNotReady(cause) {
return nil, status.Error(codes.Unavailable, err.Error())
}
if isConflict(cause) {
return nil, status.Error(codes.AlreadyExists, err.Error())
}
return nil, status.Error(codes.Internal, err.Error())
}
}

_, err := h.handleRequest(ctx, uint64(r.Replica), r.Tenant, &prompb.WriteRequest{Timeseries: r.Timeseries})
if err != nil {
level.Debug(h.logger).Log("msg", "failed to handle request", "err", err)
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