![]() In the right pane, right-click the SQL instance that you want to configure and select Properties from the drop-down menu. When the SQL Server Configuration Manager is opened, make sure that you have selected SQL Server Services in the left pane. If file I/O streaming access is allowed, you can allow remote clients to have access to the streaming data if you want. Through the SQL Server Configuration Manager, you must enable T-SQL access to FILESTREAM data, and if that has been enabled, you can also enable file I/O streaming access. The capability to access FILESTREAM data must be enabled both outside and inside your SQL Server instance, as mentioned in Chapter 1 when discussing configuration. ![]() SQL Server can’t encrypt FILESTREAM data natively.īecause the FileTable feature is built on top of the FILESTREAM technology, I’ll first tell you about FILESTREAM (which was introduced in SQL Server 2008) and then about what has been added in SQL Server 2012 to enable FileTables. A SELECT statement in a database snapshot that requests a FILESTREAM column generates an error. Some drawbacks of using FILESTREAM or FileTable data include the following.ĭatabase snapshots can’t include the FILESTREAM filegroups, so the FILESTREAM data is unavailable. The data is available through any Wind32 application without any modification of the application.įileTables allow you to support a hierarchy of directories and files. The large object data is kept transactionally consistent with structured data.ĭatabases containing FILESTREAM data can participate in the SQL Server 2012 AlwaysOn availability groups.įileTable data has these additional benefits. The large object size is limited only by the NTFS volume size, not the old 2 GB limit for large object data stored within a database.įILESTREAM data has the following additional benefits. The large object data is accessible through both Transact-SQL (T-SQL) and the NTFS streaming APIs, which can provide great performance benefits. The large object data is stored in the file system but rooted in the database as a 48-byte file pointer value in the column that contains the FILESTREAM data. Some benefits of both FILESTREAM and FileTable data include the following. ![]() As you start evaluating whether FILESTREAM or FileTable data is beneficial for your applications, consider both the benefits and the drawbacks. The data stored in the file system can be FILESTREAM or FileTable data. SQL Server allows you to manage file system objects as though they were part of your database to provide the benefits of having large objects in the database while minimizing the disadvantages. Read or write streaming operations from varchar(MAX) and varbinary(MAX) columns are significantly slower than streaming from NTFS files. Updating large objects can cause extensive database fragmentation.ĭatabase files can become extremely large. The upper limit on the size of any large object value is 2 GB. Large objects can require a very large number of buffers in cache. Some of the disadvantages of storing large objects in your database include the following. Your backup and restore operations include the large object data, allowing you integrated, point-in-time recovery of your large objects.Īll data can be stored using a single storage and query environment. Transactional consistency of your large object data can be guaranteed. Some of the benefits of storing large objects in your database include the following. ![]() Although the flexible methods that SQL Server uses to store large object data in the database give you many advantages over data stored in the file system, they also have many disadvantages. ![]()
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