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background replay consume implementation
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118 changes: 118 additions & 0 deletions
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libs/cluster/Server/Replication/ReplicaOps/ReplicaReplayTask.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| // Copyright (c) Microsoft Corporation. | ||
| // Licensed under the MIT license. | ||
|
|
||
| using System; | ||
| using System.Threading; | ||
| using Garnet.common; | ||
| using Microsoft.Extensions.Logging; | ||
| using Tsavorite.core; | ||
|
|
||
| namespace Garnet.cluster | ||
| { | ||
| internal sealed partial class ReplicationManager : IBulkLogEntryConsumer, IDisposable | ||
| { | ||
| TsavoriteLogScanSingleIterator replayIterator = null; | ||
| CancellationTokenSource replicaReplayTaskCts; | ||
| SingleWriterMultiReaderLock activeReplay; | ||
|
|
||
| void ResetReplayIterator() | ||
| { | ||
| ResetReplayCts(); | ||
| replayIterator?.Dispose(); | ||
| replayIterator = null; | ||
|
|
||
| void ResetReplayCts() | ||
| { | ||
| if (replicaReplayTaskCts == null) | ||
| { | ||
| replicaReplayTaskCts = CancellationTokenSource.CreateLinkedTokenSource(ctsRepManager.Token); | ||
| } | ||
| else | ||
| { | ||
| replicaReplayTaskCts.Cancel(); | ||
| try | ||
| { | ||
| activeReplay.WriteLock(); | ||
| replicaReplayTaskCts.Dispose(); | ||
| replicaReplayTaskCts = CancellationTokenSource.CreateLinkedTokenSource(ctsRepManager.Token); | ||
| } | ||
| finally | ||
| { | ||
| activeReplay.WriteUnlock(); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| public void Throttle() { } | ||
|
|
||
| public unsafe void Consume(byte* record, int recordLength, long currentAddress, long nextAddress, bool isProtected) | ||
| { | ||
| replicaReplayTaskCts.Token.ThrowIfCancellationRequested(); | ||
|
|
||
| if (ReplicationOffset != currentAddress) | ||
| { | ||
| logger?.LogError("ReplicaReplayTask.Consume Begin Address Mismatch {recordLength}; {currentAddress}; {nextAddress}; {ReplicationOffset}", recordLength, currentAddress, nextAddress, ReplicationOffset); | ||
| throw new GarnetException($"ReplicaReplayTask.Consume Begin Address Mismatch {recordLength}; {currentAddress}; {nextAddress}; {ReplicationOffset}", LogLevel.Warning, clientResponse: false); | ||
| } | ||
|
|
||
| ReplicationOffset = currentAddress; | ||
| var ptr = record; | ||
| while (ptr < record + recordLength) | ||
| { | ||
| var entryLength = storeWrapper.appendOnlyFile.HeaderSize; | ||
| var payloadLength = storeWrapper.appendOnlyFile.UnsafeGetLength(ptr); | ||
| if (payloadLength > 0) | ||
| { | ||
| aofProcessor.ProcessAofRecordInternal(ptr + entryLength, payloadLength, true); | ||
| entryLength += TsavoriteLog.UnsafeAlign(payloadLength); | ||
| } | ||
| else if (payloadLength < 0) | ||
| { | ||
| if (!clusterProvider.serverOptions.EnableFastCommit) | ||
| { | ||
| throw new GarnetException("Received FastCommit request at replica AOF processor, but FastCommit is not enabled", clientResponse: false); | ||
| } | ||
| TsavoriteLogRecoveryInfo info = new(); | ||
| info.Initialize(new ReadOnlySpan<byte>(ptr + entryLength, -payloadLength)); | ||
| //TODO: Verify again that this does not write into the AOF | ||
| storeWrapper.appendOnlyFile?.UnsafeCommitMetadataOnly(info, isProtected); | ||
| entryLength += TsavoriteLog.UnsafeAlign(-payloadLength); | ||
| } | ||
| ptr += entryLength; | ||
| ReplicationOffset += entryLength; | ||
| } | ||
|
|
||
| if (ReplicationOffset != nextAddress) | ||
| { | ||
| logger?.LogError("ReplicaReplayTask.Consume Begin Address Mismatch {recordLength}; {currentAddress}; {nextAddress}; {ReplicationOffset}", recordLength, currentAddress, nextAddress, ReplicationOffset); | ||
| throw new GarnetException($"ReplicaReplayTask.Consume Begin Address Mismatch {recordLength}; {currentAddress}; {nextAddress}; {ReplicationOffset}", LogLevel.Warning, clientResponse: false); | ||
| } | ||
| } | ||
|
|
||
| public async void ReplicaReplayTask() | ||
| { | ||
| try | ||
| { | ||
| activeReplay.ReadLock(); | ||
| while (true) | ||
| { | ||
| replicaReplayTaskCts.Token.ThrowIfCancellationRequested(); | ||
| await replayIterator.BulkConsumeAllAsync( | ||
| this, | ||
| clusterProvider.serverOptions.ReplicaSyncDelayMs, | ||
| maxChunkSize: 1 << 20, | ||
| replicaReplayTaskCts.Token); | ||
| } | ||
| } | ||
| catch (Exception ex) | ||
| { | ||
| logger?.LogWarning(ex, "An exception occurred at ReplicationManager.ReplicaReplayTask - terminating"); | ||
| } | ||
| finally | ||
| { | ||
| activeReplay.ReadUnlock(); | ||
| } | ||
| } | ||
| } | ||
| } |
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