Windows Azure Storage
NameTitleOrganization
Agenda
Windows Azure Storage
Blob Storage
Drives
Tables
Queues
Windows Azure Storage
Storage in the CloudScalable, durable, and availableAnywhere at anytime accessOnly pay for what the service uses
Exposed via RESTful Web ServicesUse from Windows Azure ComputeUse from anywhere on the internet
Windows Azure Storage AccountUser specified globally unique account name
North Central USNorthern Europe
Western Europe East Asia
South East Asia
US Europe Asia
Can choose geo-location to host storage account:
South Central US
West US East US
Windows Azure Storage AccountCan CDN Enable AccountBlobs delivered via 24 global CDN nodes
Can co-locate storage account with compute accountExplicitly or using affinity groups
Accounts have two independent 512 bit shared secret keys
100 TBs per account
Storage in the Development FabricProvides a local “Mock” storageEmulates storage in cloudAllows offline developmentRequires SQL Express 2005/2008 or above
http://msdn.microsoft.com/en-us/gg433135
The Storage Client API
In this presentation we’ll cover the underlying
RESTful APICan call these from any HTTP cliente.g. Flash, Silverlight, etc…
Client API from SDK Microsoft.WindowsAzure.StorageClientProvides a strongly typed wrapper around REST services
Storage Security
Windows Azure Storage provides simple security for calls to storage serviceHTTPS endpointDigitally sign requests for privileged operations
Two 512bit symmetric keys per storage accountCan be regenerated independently
More granular security via Shared Access Signatures
Windows Azure Storage Abstractions
TablesStructured storage. A table is a set of entities; an entity is
a set of properties.
QueuesReliable storage and delivery of messages for an application.
BlobsSimple named files along with metadata for the file.
DrivesDurable NTFS volumes for Windows Azure applications to use. Based on Blobs.
Blob Storage
Blob Storage Concepts
BlobContainerAccount
http://<account>.blob.core.windows.net/<container>/<blobname>
Pages/ Blocks
contoso
PIC01.JPG
Block/Page
Block/Page
PIC02.JPG
images
VID1.AVIvideos
Blob Details
Main Web Service
Operations
PutBlobGetBlobDeleteBlobCopyBlobSnapshotBlob LeaseBlob
Blob Details
Associate Metadata with Blob
Standard HTTP metadata/headers (Cache-Control, Content-Encoding, Content-Type, etc)
Metadata is <name, value> pairs, up to 8KB per blob
Either as part of PutBlob or independently
Blob Details
Blob always accessed by
name
Can include ‘/‘ or other delimeter in name e.g. /<container>/myblobs/blob.jpg
Blob ContainersMultiple Containers per AccountSpecial $root container
Blob ContainerA container holds a set of blobsSet access policies at the container level Associate Metadata with ContainerList the blobs in a containerIncluding Blob Metadata and MD5 NO search/query. i.e. no WHERE MetadataValue = ?
Blobs ThroughputEffectively in Partition of 1Target of 60MB/s per Blob
Tour of the Blob Service
demo
Two Types of Blobs Under the Hood
Block BlobTargeted at streaming workloads
Each blob consists of a sequence of blocksEach block is identified by a Block ID
Size limit 200GB per blob
Optimistic Concurrency via Etags
Page BlobTargeted at random read/write workloads
Each blob consists of an array of pages Each page is identified by its offset from the start of the blob
Size limit 1TB per blob
Optimistic or Pessimistic (locking) concurrency via leases
Drives
Tables
Table Storage Concepts
EntityTableAccount
contoso
Name =…Email = …
Name =…EMailAdd=
customers
Photo ID =…Date =…
photos
Photo ID =…Date =…
Entity PropertiesEntity can have up to 255 propertiesUp to 1MB per entity
Mandatory Properties for every entityPartitionKey & RowKey (only indexed properties)Uniquely identifies an entityDefines the sort order
Timestamp Optimistic ConcurrencyExposed as an HTTP Etag
No fixed schema for other propertiesEach property is stored as a <name, typed value> pairNo schema stored for a tableProperties can be the standard .NET types String, binary, bool, DateTime, GUID, int, int64, and double
No Fixed Schema
FIRST LAST BIRTHDATE
Wade Wegner 2/2/1981
Nathan Totten 3/15/1965
Nick Harris May 1, 1976
FAV SPORT
Canoeing
Querying
FIRST LAST BIRTHDATE
Wade Wegner 2/2/1981
Nathan Totten 3/15/1965
Nick Harris May 1, 1976
?$filter=Last eq ‘Wegner’
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be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.
