Azure Storage Blob types (CloudBlobContainer, CloudBlobClient, etc.) and thread safety

Question

I am developing an azure application which needs at some point to upload(download) a large amount of small blobs to a single container (more than 1k blobs, less than 1 Mb ea

Answer 1

You should be fine sharing a single blob container reference as long as you are not trying to perform an update on the container itself (even then, I think it would still be fine in most scenarios like List). In fact, you don't really even need the container reference if you are sure it exists:

client.GetContainerReference("foo").GetBlobReference("bar");
client.GetBlobReference("foo/bar");  //same

As you can see, the only reason to get a container reference is if you want to perform an operation on the container itself (list, delete, etc.). If you keep the blob references in separate threads, you will be fine.