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refactor(bigquery/storage/managedwriter): introduce send optimizers (#…
…7323) * refactor(bigquery/storage/managedwriter): introduce send optimizers This PR introduces a new optimizer abstraction for connection objects, but doesn't wire it in. The purpose of the optimizers is to leverage awareness of previous requests to reduce transferred bytes.
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| // Copyright 2023 Google LLC | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // https://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
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| package managedwriter | ||
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| import ( | ||
| "cloud.google.com/go/bigquery/storage/apiv1/storagepb" | ||
| "google.golang.org/protobuf/proto" | ||
| ) | ||
|
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| // optimizeAndSend handles the general task of optimizing AppendRowsRequest messages send to the backend. | ||
| // | ||
| // The basic premise is that by maintaining awareness of previous sends, individual messages can be made | ||
| // more efficient (smaller) by redacting redundant information. | ||
| type sendOptimizer interface { | ||
| // signalReset is used to signal to the optimizer that the connection is freshly (re)opened. | ||
| signalReset() | ||
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| // optimizeSend handles redactions for a given stream. | ||
| optimizeSend(arc storagepb.BigQueryWrite_AppendRowsClient, req *storagepb.AppendRowsRequest) error | ||
| } | ||
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| // passthroughOptimizer is an optimizer that doesn't modify requests. | ||
| type passthroughOptimizer struct { | ||
| } | ||
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| func (po *passthroughOptimizer) signalReset() { | ||
| // we don't care, just here to satisfy the interface. | ||
| } | ||
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| func (po *passthroughOptimizer) optimizeSend(arc storagepb.BigQueryWrite_AppendRowsClient, req *storagepb.AppendRowsRequest) error { | ||
| return arc.Send(req) | ||
| } | ||
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| // simplexOptimizer is used for connections where there's only a single stream's data being transmitted. | ||
| // | ||
| // The optimizations here are straightforward: the first request on a stream is unmodified, all | ||
| // subsequent requests can redact WriteStream, WriterSchema, and TraceID. | ||
| // | ||
| // TODO: this optimizer doesn't do schema evolution checkes, but relies on existing behavior that triggers reconnect | ||
| // on schema change. Revisit this, as it may not be necessary once b/266946486 is resolved. | ||
| type simplexOptimizer struct { | ||
| haveSent bool | ||
| } | ||
|
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| func (eo *simplexOptimizer) signalReset() { | ||
| eo.haveSent = false | ||
| } | ||
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| func (eo *simplexOptimizer) optimizeSend(arc storagepb.BigQueryWrite_AppendRowsClient, req *storagepb.AppendRowsRequest) error { | ||
| var resp error | ||
| if eo.haveSent { | ||
| // subsequent send, clone and redact. | ||
| cp := proto.Clone(req).(*storagepb.AppendRowsRequest) | ||
| cp.WriteStream = "" | ||
| cp.GetProtoRows().WriterSchema = nil | ||
| cp.TraceId = "" | ||
| resp = arc.Send(cp) | ||
| } else { | ||
| // first request, send unmodified. | ||
| resp = arc.Send(req) | ||
| } | ||
| eo.haveSent = resp == nil | ||
| return resp | ||
| } | ||
|
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| // multiplexOptimizer is used for connections where requests for multiple streams are sent on a common connection. | ||
| // | ||
| // In this case, the optimizations are as follows: | ||
| // * We **must** send the WriteStream on all requests. | ||
| // * For sequential requests to the same stream, schema can be redacted after the first request. | ||
| // * Trace ID can be redacted from all requests after the first. | ||
| type multiplexOptimizer struct { | ||
| prev *storagepb.AppendRowsRequest | ||
| } | ||
|
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| func (mo *multiplexOptimizer) signalReset() { | ||
| mo.prev = nil | ||
| } | ||
|
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| func (mo *multiplexOptimizer) optimizeSend(arc storagepb.BigQueryWrite_AppendRowsClient, req *storagepb.AppendRowsRequest) error { | ||
| var resp error | ||
| // we'll need a copy | ||
| cp := proto.Clone(req).(*storagepb.AppendRowsRequest) | ||
| if mo.prev != nil { | ||
| var swapOnSuccess bool | ||
| // Clear trace ID. We use the _presence_ of a previous request for reasoning about TraceID, we don't compare | ||
| // it's value. | ||
| cp.TraceId = "" | ||
| // we have a previous send. | ||
| if cp.GetWriteStream() != mo.prev.GetWriteStream() { | ||
| // different stream, no further optimization. | ||
| swapOnSuccess = true | ||
| } else { | ||
| // same stream | ||
| if !proto.Equal(mo.prev.GetProtoRows().GetWriterSchema().GetProtoDescriptor(), cp.GetProtoRows().GetWriterSchema().GetProtoDescriptor()) { | ||
| swapOnSuccess = true | ||
| } else { | ||
| // the redaction case, where we won't swap. | ||
| cp.GetProtoRows().WriterSchema = nil | ||
| } | ||
| } | ||
| resp = arc.Send(cp) | ||
| if resp == nil && swapOnSuccess { | ||
| cp.GetProtoRows().Rows = nil | ||
| cp.MissingValueInterpretations = nil | ||
| mo.prev = cp | ||
| } | ||
| if resp != nil { | ||
| mo.prev = nil | ||
| } | ||
| return resp | ||
| } | ||
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| // no previous trace case. | ||
| resp = arc.Send(req) | ||
| if resp == nil { | ||
| // copy the send as the previous. | ||
| cp.GetProtoRows().Rows = nil | ||
| cp.MissingValueInterpretations = nil | ||
| mo.prev = cp | ||
| } | ||
| return resp | ||
| } |
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| // Copyright 2023 Google LLC | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // https://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
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| package managedwriter | ||
|
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| import ( | ||
| "io" | ||
| "testing" | ||
|
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| "cloud.google.com/go/bigquery/storage/apiv1/storagepb" | ||
| "cloud.google.com/go/bigquery/storage/managedwriter/testdata" | ||
| "github.com/google/go-cmp/cmp" | ||
| "google.golang.org/protobuf/proto" | ||
| "google.golang.org/protobuf/reflect/protodesc" | ||
| "google.golang.org/protobuf/testing/protocmp" | ||
| ) | ||
|
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| func TestSendOptimizer(t *testing.T) { | ||
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| exampleReq := &storagepb.AppendRowsRequest{ | ||
| WriteStream: "foo", | ||
| Rows: &storagepb.AppendRowsRequest_ProtoRows{ | ||
| ProtoRows: &storagepb.AppendRowsRequest_ProtoData{ | ||
| Rows: &storagepb.ProtoRows{ | ||
| SerializedRows: [][]byte{[]byte("row_data")}, | ||
| }, | ||
| WriterSchema: &storagepb.ProtoSchema{ | ||
| ProtoDescriptor: protodesc.ToDescriptorProto((&testdata.SimpleMessageProto2{}).ProtoReflect().Descriptor()), | ||
| }, | ||
| }, | ||
| }, | ||
| TraceId: "trace_id", | ||
| } | ||
|
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| var testCases = []struct { | ||
| description string | ||
| optimizer sendOptimizer | ||
| reqs []*storagepb.AppendRowsRequest | ||
| sendResults []error | ||
| wantReqs []*storagepb.AppendRowsRequest | ||
| }{ | ||
| { | ||
| description: "passthrough-optimizer", | ||
| optimizer: &passthroughOptimizer{}, | ||
| reqs: []*storagepb.AppendRowsRequest{ | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| }, | ||
| sendResults: []error{ | ||
| nil, | ||
| io.EOF, | ||
| io.EOF, | ||
| }, | ||
| wantReqs: []*storagepb.AppendRowsRequest{ | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| }, | ||
| }, | ||
| { | ||
| description: "simplex no errors", | ||
| optimizer: &simplexOptimizer{}, | ||
| reqs: []*storagepb.AppendRowsRequest{ | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| }, | ||
| sendResults: []error{ | ||
| nil, | ||
| nil, | ||
| nil, | ||
| }, | ||
| wantReqs: func() []*storagepb.AppendRowsRequest { | ||
| want := make([]*storagepb.AppendRowsRequest, 3) | ||
| // first has no redactions. | ||
| want[0] = proto.Clone(exampleReq).(*storagepb.AppendRowsRequest) | ||
| req := proto.Clone(want[0]).(*storagepb.AppendRowsRequest) | ||
| req.GetProtoRows().WriterSchema = nil | ||
| req.TraceId = "" | ||
| req.WriteStream = "" | ||
| want[1] = req | ||
| // previous had errors, so unredacted. | ||
| want[2] = req | ||
| return want | ||
| }(), | ||
| }, | ||
| { | ||
| description: "simplex w/partial errors", | ||
| optimizer: &simplexOptimizer{}, | ||
| reqs: []*storagepb.AppendRowsRequest{ | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| }, | ||
| sendResults: []error{ | ||
| nil, | ||
| io.EOF, | ||
| nil, | ||
| }, | ||
| wantReqs: func() []*storagepb.AppendRowsRequest { | ||
| want := make([]*storagepb.AppendRowsRequest, 3) | ||
| want[0] = proto.Clone(exampleReq).(*storagepb.AppendRowsRequest) | ||
| req := proto.Clone(want[0]).(*storagepb.AppendRowsRequest) | ||
| req.GetProtoRows().WriterSchema = nil | ||
| req.TraceId = "" | ||
| req.WriteStream = "" | ||
| want[1] = req | ||
| want[2] = want[0] | ||
| return want | ||
| }(), | ||
| }, | ||
| { | ||
| description: "multiplex single all errors", | ||
| optimizer: &multiplexOptimizer{}, | ||
| reqs: []*storagepb.AppendRowsRequest{ | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| }, | ||
| sendResults: []error{ | ||
| io.EOF, | ||
| io.EOF, | ||
| io.EOF, | ||
| }, | ||
| wantReqs: []*storagepb.AppendRowsRequest{ | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| }, | ||
| }, | ||
| { | ||
| description: "multiplex single no errors", | ||
| optimizer: &multiplexOptimizer{}, | ||
| reqs: []*storagepb.AppendRowsRequest{ | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| proto.Clone(exampleReq).(*storagepb.AppendRowsRequest), | ||
| }, | ||
| sendResults: []error{ | ||
| nil, | ||
| nil, | ||
| nil, | ||
| }, | ||
| wantReqs: func() []*storagepb.AppendRowsRequest { | ||
| want := make([]*storagepb.AppendRowsRequest, 3) | ||
| want[0] = proto.Clone(exampleReq).(*storagepb.AppendRowsRequest) | ||
| req := proto.Clone(want[0]).(*storagepb.AppendRowsRequest) | ||
| req.GetProtoRows().WriterSchema = nil | ||
| req.TraceId = "" | ||
| want[1] = req | ||
| want[2] = req | ||
| return want | ||
| }(), | ||
| }, | ||
| { | ||
| description: "multiplex interleave", | ||
| optimizer: &multiplexOptimizer{}, | ||
| reqs: func() []*storagepb.AppendRowsRequest { | ||
| reqs := make([]*storagepb.AppendRowsRequest, 10) | ||
| reqA := proto.Clone(exampleReq).(*storagepb.AppendRowsRequest) | ||
| reqA.WriteStream = "alpha" | ||
|
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| reqB := proto.Clone(exampleReq).(*storagepb.AppendRowsRequest) | ||
| reqB.WriteStream = "beta" | ||
| reqB.GetProtoRows().GetWriterSchema().ProtoDescriptor = protodesc.ToDescriptorProto((&testdata.AllSupportedTypes{}).ProtoReflect().Descriptor()) | ||
| reqs[0] = reqA | ||
| reqs[1] = reqA | ||
| reqs[2] = reqB | ||
| reqs[3] = reqA | ||
| reqs[4] = reqB | ||
| reqs[5] = reqB | ||
| reqs[6] = reqB | ||
| reqs[7] = reqB | ||
| reqs[8] = reqA | ||
| reqs[9] = reqA | ||
|
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| return reqs | ||
| }(), | ||
| sendResults: []error{ | ||
| nil, | ||
| nil, | ||
| nil, | ||
| nil, | ||
| nil, | ||
| io.EOF, | ||
| nil, | ||
| nil, | ||
| nil, | ||
| io.EOF, | ||
| }, | ||
| wantReqs: func() []*storagepb.AppendRowsRequest { | ||
| want := make([]*storagepb.AppendRowsRequest, 10) | ||
|
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| wantReqAFull := proto.Clone(exampleReq).(*storagepb.AppendRowsRequest) | ||
| wantReqAFull.WriteStream = "alpha" | ||
|
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| wantReqANoTrace := proto.Clone(wantReqAFull).(*storagepb.AppendRowsRequest) | ||
| wantReqANoTrace.TraceId = "" | ||
|
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| wantReqAOpt := proto.Clone(wantReqAFull).(*storagepb.AppendRowsRequest) | ||
| wantReqAOpt.GetProtoRows().WriterSchema = nil | ||
| wantReqAOpt.TraceId = "" | ||
|
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| wantReqBFull := proto.Clone(exampleReq).(*storagepb.AppendRowsRequest) | ||
| wantReqBFull.WriteStream = "beta" | ||
| wantReqBFull.GetProtoRows().GetWriterSchema().ProtoDescriptor = protodesc.ToDescriptorProto((&testdata.AllSupportedTypes{}).ProtoReflect().Descriptor()) | ||
|
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| wantReqBNoTrace := proto.Clone(wantReqBFull).(*storagepb.AppendRowsRequest) | ||
| wantReqBNoTrace.TraceId = "" | ||
|
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| wantReqBOpt := proto.Clone(wantReqBFull).(*storagepb.AppendRowsRequest) | ||
| wantReqBOpt.GetProtoRows().WriterSchema = nil | ||
| wantReqBOpt.TraceId = "" | ||
|
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| want[0] = wantReqAFull | ||
| want[1] = wantReqAOpt | ||
| want[2] = wantReqBNoTrace | ||
| want[3] = wantReqANoTrace | ||
| want[4] = wantReqBNoTrace | ||
| want[5] = wantReqBOpt | ||
| want[6] = wantReqBFull | ||
| want[7] = wantReqBOpt | ||
| want[8] = wantReqANoTrace | ||
| want[9] = wantReqAOpt | ||
|
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| return want | ||
| }(), | ||
| }, | ||
| } | ||
|
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| for _, tc := range testCases { | ||
| testARC := &testAppendRowsClient{} | ||
| testARC.sendF = func(req *storagepb.AppendRowsRequest) error { | ||
| testARC.requests = append(testARC.requests, proto.Clone(req).(*storagepb.AppendRowsRequest)) | ||
| respErr := tc.sendResults[0] | ||
| tc.sendResults = tc.sendResults[1:] | ||
| return respErr | ||
| } | ||
|
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| for _, req := range tc.reqs { | ||
| tc.optimizer.optimizeSend(testARC, req) | ||
| } | ||
| // now, compare. | ||
| for k, wr := range tc.wantReqs { | ||
| if diff := cmp.Diff(testARC.requests[k], wr, protocmp.Transform()); diff != "" { | ||
| t.Errorf("%s (req %d) mismatch: -got, +want:\n%s", tc.description, k, diff) | ||
| } | ||
| } | ||
| } | ||
| } |