Geeks With Blogs
IUnknown Windows Azure mumblings of IUnknown
The Windows Azure team announced availability of the November 2009 CTP of Windows Azure along with new Tooling for Visual studio and an improved Development Fabric as well as samples. The official announcement is given below, straight from the horses’ mouth.
 Today we released several new features for Windows Azure through the Windows Azure Tools and SDK.
This release adds support for Visual Studio 2010 Beta 2 and VWD Express 2010 Beta 2.
What’s New
·         Service Model UI:A redesigned and significantly more complete interface for manipulating Role configuration information. To access, double-click on a role node in the Solution Explorer.
·         Windows Azure Service Hosting Runtime Managed Library: The latest version of the Service Hosting Runtime API includes support for enhanced communication between roles and for runtime notification of service configuration changes. Direct communication between role instances enables new application development scenarios, including applications that distribute state across role instances. Service configuration changes include an increase or decrease in the number of request role instances and changes to the values of configuration settings.
·         Windows Azure Diagnostics Managed Library: The new Diagnostics API enables logging using standard .NET APIs. The Diagnostics API provides built-in support for collecting standard logs and diagnostic information, including the Windows Azure logs, IIS 7.0 logs, Failed Request logs, crash dumps, Windows Event logs, performance counters, and custom logs.
·         Windows Azure Storage Client Managed Library: The Storage Client library provides a .NET API for accessing the Windows Azure storage services.
·         Certificate Management: Enhanced support for SSL certificates in Windows Azure and in the Windows Azure SDK enables the secure automated deployment of certificates to services hosted on Windows Azure.
·         Variable-size Virtual Machines (VMs): Developers may now specify the size of the virtual machine to which they wish to deploy a role instance, based on the role's resource requirements. The size of the VM determines the number of CPU cores, the memory capacity, and the local file system size allocated to a running instance.
·         External endpoints for worker roles. A worker role may now define any number of external endpoints for HTTP, HTTPS, and TCP, and specify the desired port number for any external endpoint.
·         Persistent Local Resource Storage: Developers can now choose to persist data written to a local storage resource at runtime can when the role is recycled.
·         Development Storage: Development storage provides a high-fidelity simulation of the Windows Azure storage services in the cloud. Tables can now be created dynamically in the development storage Table service.
·         Additional role templates: Support for ASP.NET MVC 2 (2010 only), F# worker roles (2010 only), and WCF Service Application web roles.
·         Updated Samples: The samples included with the Windows Azure SDK have been updated to demonstrate new features. The samples now include both C# and Visual Basic versions.
Also announced were the new features of Azure storage listed below.
·         Block Blob – This is the blob type that we have offered since PDC 2008, which is optimized for streaming workloads.   Each blob consists of a sequence of blocks, and each block is identified by a unique Block ID relative to the blob.  This type of blob allows blocks to be uploaded with PutBlock and then committed with PutBlockList.   Block Blobs can now be up to 200GB in size.
·         Page Blob – With this release we have added a new type of blob optimized for random reads/writes called Page Blob.   A Page Blob consists of an array of pages and each page is identified by its offset from the start of the blob.  PutPage is used to perform a ranged put on the blob, and the update is applied immediately to the blob.  In addition, regions of the blob can be cleared with ClearPage, and these cleared regions do not consume storage space.  This means a storage account is only charged for the pages within a Page Blob with data stored in them.    A Page Blob can be up to 1TB in size.
Enhancements for both types of blobs:
·         Content Delivery Network – Windows Azure CDN can be used to cache your Windows Azure Blobs at strategically placed locations to provide maximum bandwidth for delivering your content to users.  With today’s release you can now specify the HTTP Cache-Control policy for each blob, and that will determine the length of time in which the blob will be cached in the Windows Azure CDN.  You can specify the time-to-live (TTL) in the Cache-Control to be as small as you want, but remember you only benefit from the CDN if your TTL is long enough and content popular enough to get cache hits when serving the data out of Windows Azure CDN.  See here for more details on Windows Azure CDN:
·         Custom Storage Domain Names
http://<account><container>/<blobname>. With the release today, custom storage domain names now work with authenticated access as well as for anonymous access.  See here for more details on custom storage domain names: – The custom storage domain name feature allows you to register a custom domain name for a given storage account, and to use that custom domain to access your blobs instead of the blob service URL:
·         Snapshot Blob – Allows the creation of read-only versions of a blob, which can be used for creating blob backups or blob versioning.  An account is only charged for the unique blocks or pages; blocks or pages shared across snapshots and the base blob from which they were derived do not accrue additional storage charges.
·         Lease Blob – Clients can now acquire a lease on a blob for exclusive write access to that blob.  A lease will lock the blob for exclusive writing until the lease expires, while still allowing non-exclusive read access to the blob.    The initial version of Lease Blob supports only one-minute leases, but the leases can be renewed to allow clients to maintain the lock for longer periods of time.  Lease Blob is useful when dealing with high concurrent writes to Page Blob.
·         Get Blob – This is used to retrieve both block and page blobs.   In addition, it now provides an option to return a dynamically generated MD5 for ranged reads that are less than or equal to 4MB in size.
·         List Blobs – Applications can now retrieve each blob’s application metadata and MD5 information when listing blobs.
·         Blob Properties – Applications can now update a blob’s properties independently of the blob, and can specify the standard HTTP Cache-Control property for blobs.
·         Root Container - Anonymous access is now provided for blobs stored in the root container.   This was an important missing feature for supporting cross domain policy access for Silverlight.  For example, you can now specify the following cross domain policy file in the root blob container:
Enhancement for Queue:
·         Dequeue Count  – We now return a dequeue count for each message retrieved from Windows Azure Queue. This allows applications to see how many times a message has been dequeued.
In addition to the above new features we made the following semantic changes as part of this versioned CTP release:
·         Anonymous Blob Access – All blob containers having their access set to public using the “x-ms-version: 2009-09-19” version of the blob API will have their anonymous requests processed using the 2009-09-19 version of the blob APIs.   Containers that are set to public with a prior version will still have their anonymous requests processed with the CTP2008 version of the blob APIs. 
·         Blob and Queue Authentication – Support has been added for an improved signing algorithm for enhanced security by including additional information as part of the canonicalization of the String-to-Sign.
·         Listing Containers, Queues and Blobs – Changed the response format for listing operations to be more XML friendly.
·         Blob and Queue Metadata Naming – Metadata for a container or blob resource is stored as a name-value pair associated with the resource.   Metadata names must now adhere to the naming rules for C# identifiers
·         Table Query – A table query is allowed to execute for up to 5 seconds before returning a result and potential continuation.
·         Table DataService Version – All REST calls to the Table service must now include the DataServiceVersion and MaxDataServiceVersion headers on every request. Applications using the Astoria client library already send the required headers.
The above features for this new release are available via the Windows Azure Storage REST interface, and they are also supported as part of the new Storage Client Library just released with the Windows Azure SDK.
For more information, details about these new features can be found in the MSDN documentation soon here:
The baby seems to be growing at a fast clip thanks to the excellent effort put in by the Azure team at MSFT. Kudos to you guys. This release definitely brings a lot of features which will establish Azure as a credible platform for cloud application development.
In the weeks to come lets diver deeper(or higher ?) into the world of Windows Azure.


Posted on Monday, November 16, 2009 9:43 AM | Back to top

Comments on this post: Azure November CTP announced

# re: Azure November CTP announced
Requesting Gravatar...
can u tell me , how can i put cross domain policy root container on azure blob.
i am trying to create folder @root but http status shows 400.
Left by Muhammad Azhar on Feb 03, 2010 3:57 PM

# re: Azure November CTP announced
Requesting Gravatar...
Azhar, the 400 is typically associated with bad HTTP requests. Do you get the same request for every file you attempt ot put on the container root or is it specifically for the cross domain access policy?

Are you using StorageClient? or wiring up your own REST?
Left by IUnknown on Feb 03, 2010 6:09 PM

Your comment:
 (will show your gravatar)

Copyright © Sarang | Powered by: