When to use FileTable, and DB design questions
I have a kind of interesting scenario- lets say I have a list of people I wish to store in the database, so I create a table 'Person'. Now lets say each person has a 2000 large image files (say high res photos or something). Each image is >
5M. What I need to do at the end of the day is retrieve a person, and upon selection display a selected photo (or photos) in my C# WPF app.
I was looking at FileTable to store the data on the disk, as this would be preferable to storing all these images as blobs. But I wasn't sure how to associate the Person with their images through the FileTable.
Can I add additional columns to a file table (like an fk to Person)? Not sure if that is the right approach. Maybe FileStream is better? Is it better in a case like this to just store a path in the database? Which leads to the next
question...
I also need to store other kinds of data, like DeepZoom data- this is interesting stuff, as its about 600M of data, and exists in a single directory structure with multiple levels of data (and images). Apps able to read this need extremely fast access
to the data to render it quickly. I think in this case I would need to just store the location of the DZ data on disk. But that seems fragile. Is there a standard accepted way to store file locations in the DB?
Thoughts and advice appreciated!
Okay, filestream it is.
What about storing file locations? Also, if I write a 10M file to a filestream- do I write this to the DB as if it were a blob? Is it slower to write to the DB than directly to the filesystem using filestream?
I read the whitepaper on filestream and hunted around but couldn't seem to find this info...
Since a FileTable appears as a folder in the Windows file system, you can easily load files into a new FileTable by using any of the available methods for moving or copying files. These methods include Windows Explorer, command line options including xcopy
and robocopy, and custom scripts or applications.
Please read the below URL. It clearly explains answer for your question.In the below url script example also given
http://technet.microsoft.com/en-us/library/gg492083.aspx#HowToMigrateFiles
Loading or Migrating Files into a FileTable
The method that you choose for loading or migrating files into a FileTable depends on where the files are currently stored.
Current location of files
Options for migration
Files are currently stored in the file system.
SQL Server has no knowledge of the files.
Since a FileTable appears as a folder in the Windows file system, you can easily load files into a new FileTable by using any of the available methods for moving or copying files. These methods include Windows Explorer, command line options including xcopy
and robocopy, and custom scripts or applications.
You cannot convert an existing folder to a FileTable.
Files are currently stored in the file system.
SQL Server contains a table of metadata that contains pointers to the files.
The first step is to move or copy the files by using one of the methods mentioned above.
The second step is to update the existing table of metadata to point to the new location of the files.
For more information, see Example: Migrating Files from the File System into a FileTable in this topic.
Please use Marked as Answer if my post solved your problem and use Vote As Helpful if a post was useful. By ganeshk
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hi all,
When to use SELECT and END SELECT in the query.
regads,
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