Windows Azure local file storage

When you want to modify a blob in windows azure storage, you may need to download it, modify it, then upload it, it may cost a lot of bandwidth and time. Windows azure platform provides "infinite" storage space and computation ability, we can use it to perform the job.

In ServiceDefinition.csdef, add
< LocalStorage name="edmondLocal" sizeInMB="4"/ >

Then, in your webrole program, use
//Setup local file storage
ILocalResource resource = RoleManager.GetLocalResource("edmondLocal");
string path = Path.Combine(resource.RootPath, "tmp.txt");
//Get Azure Blob
using (FileStream read = File.Open(path, FileMode.OpenOrCreate))
{
BlobContents contents = new BlobContents(read);
//BlobProperties blob = this._container.GetBlob(blobName, contents, true);
BlobProperties blob = this._container.GetBlob("file_AzureTest.txt", contents, true);
read.Close();
}



Job is done! Now you have the file in your windows azure local file storage.

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