Virtual techdays INDIA │ 22-24 November 2010 AppFabric Cache Jatin Kakkar │ Sr. Program Manager, AppFabric.

virtual techdaysINDIA │ 22-24 November 2010

AppFabric Cache

Jatin Kakkar │ Sr. Program Manager, AppFabric

Overview of AppFabric Cache The Problem To the rescue -- App Fabric Cache Cache Overview Cache availability and Roadmap

Programming Cache API Sample Demo –

Provisioning on Azure Cache API Sample on Azure Cache in Session state:: On-prem and Azure

virtual techdaysINDIA │ 18-20 august 2010

S E S S I O N A G E N D A


Typical Web App

Application/ Web Tier

Users

Database

Data Tier

Application

ASP.Net App Session Cart

Hosted in memory

Load BalancerSticky Routing

Catalog sits in Database

Application Application

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…Web Tier(ASP.Net)

Users

Database

Data Tier

Application Application Application

Web Site’s too slow!!

Servers are

crashingDatabase is

hot!!

Where did my shopping cart

go?

Fast Forward in time








Cache to the rescue

Cache described

Unified Cache View

• An explicit, distributed, in-memory application cache for all kinds of data – (CLR objects, rows, XML, Binary data etc.)– Fuse "memory" across machines into a unified cache Caching clients can be

across machines or processes

Clients Access the Cache as if it was a large single

cache

Cache Layer distributes data across the various

cache nodes


Cache to the rescue

Where cache fits

… Web Tier(ASP.Net)

Users

Database CloudData Tier

Application Application Application

Caching Access Layer Caching Access Layer Caching Access Layer

Cach

ing

Serv

ice

Cach

ing

Serv

ice

Cach

ing

Serv

ice

Cache Tier








Why use AppFabric Caching?

1. Share Data Across ApplicationsNo more sticky routing2. Performance Oper Throughput Latency Bulk Fetch

Read 28, 000/ sec (2k) 1-2ms 200k/sec (512 bytes)

Write 20,000 / sec (2k) 3 ms -

Operation Servers Throughput

Read 2k 1 28,000 ops/ sec

Read 2k 2 52, 500 ops/ sec

Read 2k 3 78, 000 ops/ sec

3. Scale out by adding more boxes

4. High Availability Protect from Web & Cache Server Failure


Cache Overview

Key features High Availability Expiry/Cache Invalidation Notifications Local Cache Named Regions/Tag based search Locks

Optimistic/Pessimistic Concurrency Model

Bulk Fetch

Cache Features


• Host– Physical processes hosting AppFabric Caching

instance.• Named Caches

– Can span across machines

• Cache Item– Key, Payload (Object ), Tags, TTL, Timestamps, Version

• Regions– Physically co-located Container of Cache Items– May be implicit or explicitly created

Regions Region A

Key Payload Tags Key Payload Tags 121 xxxx “Toy” “Child”

123 yyyy “Toy” “Chair”..

Machine -> Cache Host -> Named Caches -> Regions -> Cache Items -> Objects

Named Cache : Product Catalog

Named Cache : Electronics Inventory

AppFabric Caching Service



Cache Overview

Cache Logical Hierarchy


Cache Overview

Cache Data Distribution

Scale on Data Size - More machines => More memory to cache

Scale on Cache Throughput - More machines => keys distributed across more machines => better

throughput

… Web Tier

Cache TierCa

che

Ser

vice

Cach

e S

ervi

ce

Users

Cach

e S

ervi

ce

A C EDB G IHF

ASP.Net App

Caching Client

ASP.Net App

Caching Client

ASP.Net App

Caching Client

AC ED BGI HF








Cache availability and Roadmap

Cache is available both On-premise and on Cloud Windows AppFabric Cache

Availability on Windows Server platform V1.0 RTM’ed in mid 2010

Windows Azure AppFabric Cache CTP October 2010 Commercial launch in the first half of 2011

Based off the proven Windows Server AppFabric Caching capabilities Customers can simply request for cache on demand No overhead of cluster provisioning or management Ability to add/remove capacity as per prevailing conditions Comes with ASP.NET session state and page output caching provider

Overview of AppFabric Cache The Problem To the rescue App Fabric Cache Cache Overview Cache availability and Roadmap

Programming Cache API Sample Demo –

Provisioning on Azure Cache API Sample on Azure Cache in Session state:: On-prem and Azure


S E S S I O N A G E N D A


Cache API

// Create instance of cachefactory (reads appconfig)DataCacheFactory fac = new DataCacheFactory();

// Get a named cache from the factoryDataCache catalog = fac.GetCache(“default");

// Simple Get/Putcatalog.Put("toy-101", new Toy("Puzzle", .,.));

// From the same or a different clientToy toyObj = (Toy)catalog.Get("toy-101");

<hosts> <host name="BL1CDB8083714“ cachePort="22233" cacheHostName="DistributedCacheService"/> ….. </hosts> <localCache isEnabled=“true" ../><security … />

Typical flow


Cache API

Cache Aside (Explicit Caching)// Read from CacheToy toyObj = (Toy) catalog.Get("toy-101");

Application

Cach

ing

Serv

ice

Database

// If Not present in the cacheif (toyObj == null){ // Read from backend.. toyObj = ReadFromDatabase(); // Populate Cache catalog.Put("toy-101", toyObj);

return toyObj;}

Caching Access Layer




DEMO: Provisioning a cache on Azure



DEMO: Cache API Sample on Azure



DEMO: Cache as a session state provider:- On-prem and AzureJatin Kakkar │ Sr. Program Manager, AppFabric


RESOURCES

Windows AppFabric Cache Download link -- Benefit/Details

Windows Azure AppFabric Cache CTP link -- https://portal.appfabriclabs.com/ Survey on Cache Service in Azure --

Feedback and Discussion AppFabric Forum link --

https://portal.appfabriclabs.com/

https://portal.appfabriclabs.com/

virtual techdaysTHANKS│18-20 august 2010

[email protected]│

Virtual techdays INDIA │ 22-24 November 2010 AppFabric Cache Jatin Kakkar │ Sr. Program Manager, AppFabric.

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