![]() ![]() Var fromMilliseconds = TimeSpan. Using (var dataTableReader = new DataTableReader(datatable)) Var bulkCopy = MakeSqlBulkCopy(connection) Policy.ExecuteAction(() => Write(datatable)) Private void TryWrite(DataTable datatable) Public void WriteWithRetries(DataTable datatable) Be sure that the column types from your DataTable match up with the column types in the SQL Database table. The table variable is a DataTable that contains the mapped columns defined in the above Dictionary. Var bulk = new BulkWriter("EventLog", new Dictionary The configuration setting to add is “ ConnectionString” containing a valid connection string for your SQL Database instance. ![]() The Dictionary is used to map columns from the DataTable to the actual table in SQL Database.The WriteWithRetries is not an async method because I usually execute this code within a Task which is already executing in parallel.īefore using the BulkWriter be sure to add a configuration setting to your Cloud Configurations for your Role or in your Web.Config or your App.Config. The following code shows how to use the BulkWriter. Performance will be affected by triggers and by indexes BULK load with tablock and drop/recreate indexes and change recovery model. BULK load with tablock and drop/recreate indexes. Each scenario builds on the previous by adding a new option which will hopefully speed up performance. Furthermore, locking the table during the operation will provide greater performance. For this performance test we will look at the following 4 scenarios. I used The Transient Fault Handling Application Block to provide resiliency against transient faults. re-issue the original SqlCommand, recreate. You'll need to create a new reader of the same type (e.g. You cannot reuse the same DataReader object from the failed SqlBulkCopy, as readers are forward only fire hoses that cannot be reset. SqlBulkCopy requires us to build a DataTable object which allows us to stream records from a DataTable to This means that in case of an exception, your process will take longer to run than just running the bulk copy. Get more details about the Nuget Package. ![]() PM> Install-Package Brisebois.WindowsAzure To install Brisebois.WindowsAzure, run the following command in the Package Manager Console The code from this Post is part of the Brisebois.WindowsAzure NuGet Package Faced with a much bigger challenge which required a different approach, I started looking for new alternatives and found SqlBulkCopy. Note Although data insertions are not logged in the transaction log when a minimally logged bulk copy is performed, SQL Server still logs extent allocations each time a new extent is allocated to the table.Recently I wrote about Inserting Large Amounts of Data Into Windows Azure SQL Database and this works well for reasonable amounts of data (5 to ~1000 inserts). For more information, see Optimizing Bulk Copy Performance. less overhead in the transaction log file. increase comes from minimal logging, i.e. When bulk copying a large number of rows into a table with indexes, it can be faster to drop all the indexes, perform the bulk copy, and re-create the indexes. Bulk Copy is a very efficient way of inserting data in SQL Server. You may want to create transaction log backups during the bulk copy operation to free up transaction log space. However, even with bulk-logged recovery, some transaction log space will be used. This will prevent the bulk copy operations from using excessive log space and possibly filling the log. For more information, see Controlling the Locking Behavior.Īny bulk copy into an instance of Microsoft® SQL Server™ that does not meet these conditions is logged.īefore doing bulk copy operations, it is recommended that you set the recovery model to bulk-logged if you usually use full recovery.
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