Merge pull request #983 from furmangg/patch-3

Fixing link to loading strategies blog post

Author: v-shils

docs/t-sql/statements/create-external-file-format-transact-sql.md

@@ -301,7 +301,7 @@ Notes about the table:
 ## Performance
  Using compressed files always comes with the tradeoff between transferring less data between the external data source and SQL Server while increasing the CPU usage to compress and decompress the data.
 
- Gzip compressed text files are not splittable. To improve performance for Gzip compressed text files, we recommend generating multiple files that are all stored in the same directory within the external data source. This file structure allows PolyBase to read and decompress the data faster by using multiple reader and decompression processes. The ideal number of compressed files is the maximum number of data reader processes per compute node. In [!INCLUDE[ssNoVersion](../../includes/ssnoversion-md.md)] and [!INCLUDE[ssPDW](../../includes/sspdw-md.md)], the maximum number of data reader processes is 8 per node except Azure SQL Data Warehouse Gen2 which is 20 readers per node. In [!INCLUDE[ssSDW](../../includes/sssdw-md.md)], the maximum number of data reader processes per node varies by SLO. See [Azure SQL Data Warehouse loading patterns and strategies](https://blogs.msdn.microsoft.com/sqlcat/2016/02/06/azure-sql-data-warehouse-loading-patterns-and-strategies/) for details.  
+ Gzip compressed text files are not splittable. To improve performance for Gzip compressed text files, we recommend generating multiple files that are all stored in the same directory within the external data source. This file structure allows PolyBase to read and decompress the data faster by using multiple reader and decompression processes. The ideal number of compressed files is the maximum number of data reader processes per compute node. In [!INCLUDE[ssNoVersion](../../includes/ssnoversion-md.md)] and [!INCLUDE[ssPDW](../../includes/sspdw-md.md)], the maximum number of data reader processes is 8 per node except Azure SQL Data Warehouse Gen2 which is 20 readers per node. In [!INCLUDE[ssSDW](../../includes/sssdw-md.md)], the maximum number of data reader processes per node varies by SLO. See [Azure SQL Data Warehouse loading patterns and strategies](https://blogs.msdn.microsoft.com/sqlcat/2017/05/17/azure-sql-data-warehouse-loading-patterns-and-strategies/) for details.  
 
 ## Examples