Timeout on SqlBulkCopy in Azure

本文关键字：Azure in SqlBulkCopy on Timeout | 更新日期: 2023-09-27 18:02:32

Azure中的SqlBulkCopy存在问题。

上下文如下:我们有一个大约有1000万行的表。每行大约有15列。

我们正在将数据迁移到我们的新模型中，这需要对数据进行拆分，因此1行15列变成15行。

一开始效果很好。目标表现在包含17 767 235行，并且运行得非常快。

此时，它开始抛出异常。

我做了一些修改来增加超时和使用批处理，但它似乎完全被阻塞了。

下面是原始的异常:

Timeout expired.  The timeout period elapsed prior to completion of the operation or the server is not responding.
The statement has been terminated.; TraceSource 'WaWorkerHost.exe' event Services.DataMigration.Edmi_IN_0   5/9/2014 2:44 PM    2   1508    280
      at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
   at System.Data.SqlClient.SqlBulkCopy.RunParser(BulkCopySimpleResultSet bulkCopyHandler)
   at System.Data.SqlClient.SqlBulkCopy.CopyBatchesAsyncContinuedOnSuccess(BulkCopySimpleResultSet internalResults, String updateBulkCommandText, CancellationToken cts, TaskCompletionSource`1 source)
   at System.Data.SqlClient.SqlBulkCopy.CopyBatchesAsyncContinued(BulkCopySimpleResultSet internalResults, String updateBulkCommandText, CancellationToken cts, TaskCompletionSource`1 source)
   at System.Data.SqlClient.SqlBulkCopy.CopyBatchesAsync(BulkCopySimpleResultSet internalResults, String updateBulkCommandText, CancellationToken cts, TaskCompletionSource`1 source)
   at System.Data.SqlClient.SqlBulkCopy.WriteToServerInternalRestContinuedAsync(BulkCopySimpleResultSet internalResults, CancellationToken cts, TaskCompletionSource`1 source)
   at System.Data.SqlClient.SqlBulkCopy.WriteToServerInternalRestAsync(CancellationToken cts, TaskCompletionSource`1 source)
   at System.Data.SqlClient.SqlBulkCopy.WriteToServerInternalAsync(CancellationToken ctoken)
   at System.Data.SqlClient.SqlBulkCopy.WriteRowSourceToServerAsync(Int32 columnCount, CancellationToken ctoken)
   at System.Data.SqlClient.SqlBulkCopy.WriteToServer(DataTable table, DataRowState rowState)

Timeout on SqlBulkCopy in Azure

SQL Azure非常善于保护自己。这导致节流甚至断开连接。具有大量数据的标准批量复制技术通常会失败。我强烈推荐你阅读Alexandre Brisebois关于Azure批量复制技术的博文:

http://alexandrebrisebois.wordpress.com/2013/02/16/using-sqlbulkcopy-to-insert-massive-amounts-of-data-into-windows-azure-sql-database/

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