Showing posts from August, 2013

SQL Server Filestream Of Limited Use For Publicly Accessible Websites?

We have a new feature being developed for our publicly accessible websites that enables users to upload files into “the system”. At first glance the SQL Server Filestream feature looks perfect for this type of scenario however there are several limitations that cripple it’s usefulness in publicly accessible environments.The SQL Server Filestream feature has two modes of operation. In the first mode all file access is performed through transact SQL. Even though the file is stored on the SQL Server’s filesystem it is access via T-SQL and is returned as a blob (varbinary(max)). This is essentially the same as storing the file in the database as a blob.In the second mode, the application queries the filestream enabled table to get the handle of the file. It then “streams” the file using a SMB connection to the SQL Server. This is by far more efficient that accessing the file via T-SQL. It’s more efficient because SQL Server is doing what it does best, returning data sets, and Windows Serv…