How to Build High Performance Apps Using Microsoft Azure Redis CachePranav Rastogi | @rustd M350

Introduction

Professional ASP.NET 4.5 in C# and VBAzure Redis CacheASP.NET

AgendaWhy CacheRedisAzure Redis CacheFAQs

Typical Caching Pattern

Web Tier

Data

Storage

SQL

Data

Web Tier

Cache

Data

Data

Storage

SQL

- High Throughput- Low Consistent Latency 50% : <3ms 99% : <10ms

AzureRegion

Caching

Redis

What is Redis?“Redis is an open source, BSD licensed, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets. ” - redis.io

“Redis has many different use cases. The simplest way to describe it is something between a traditional database and doing computations in memory. Redis exposes data structures that are accessed in memory via a set of commands. ” – Salvatore

Rich Ecosystem• Proven at scale: Twitter, GitHub, Weibo,

Pinterest, Snapchat, Craigstlist, StackOverflow, Flickr …

• Knowledgeable community• Rich set of clients, higher level libraries• Easy to hire for

Redis features• Low latency, high throughput key-value

store Per Key expiry, choice of eviction policies.

• Atomic operations on data types Strings, hashes, lists, sets, sorted sets, bitmaps and hyperloglogs.

• Transactions• Publisher-Subscriber pattern• LUA scripting• Pipelining• Client libraries in multiple languages

Redis features…• Databases• Highly customizable replication support• Supports hierarchy of ‘Slaves’ per ‘Master’

• Persistence support• Point in time, Log every write, or both

• Clustering

Redis

Azure Redis Cache Service

Redis Cache hosted and managed by Microsoft Dedicated virtual machine per cache Sizes: 256 MB, 1 GB, 2.8 GB, 6 GB, 13 GB, 26 GB, 53 GB Available in all Azure Regions

China and Government cloud coming SSL Basic SKU : Single cache node Standard SKU: Cache node + one replica

Availability SLA of 99.9%

Azure Redis Cache

• RBAC• Provisioning Redis Cache•Monitoring/ Diagnostics• Alerts• ASP.NET Session & Output Cache Providers•Memcache protocol shim

Azure Redis Cache…

Azure Redis Cache

FAQs

We recommend all new developments use Azure Redis Cache.

https://msdn.microsoft.com/en-us/library/azure/dn766201.aspx

Which Azure Cache offering is right for me?

Cache size High Availability - Standard Network bandwidth Cache and client should be in the same

region

How to pick the Cache SKU

50% : <3ms99% : <10ms

• Pings sent via redis-benchmark.exe•Client and Cache in same region• Lightly loaded Cache

Azure Redis Cache Latency

Cache Name

Cache Size

GET/sec (Simple GET calls of 1 KB

values)

Bandwidth (Mbits/sec)

Cores (Redis)

C0 250 MB 610 5 0.25*C1 1 GB 12,200 100 1*C2 2.5 GB 24,300 200 1C3 6 GB 48,875 400 1C4 13 GB 61,350 500 1C5 26 GB 112,275 1000 1C6 53 GB 153,219 1000+ 1

Azure Redis Cache Performance

Cache and client in the same region. Network bandwidth limits on client or

server. Redis commands usage. Measure and iterate.

High Latency

Scaling Azure Redis Cache

Scale Up– aka Vertical Scaling Increased Cache Size (Memory) Increased Bandwidth Single CPU

Scale Out– aka Horizontal Scaling Increased Cache Size, Bandwidth, CPU Improved Availability Client responsible for sharding

(Static/Dynamic) Sharding on Server (Clustering) in future

roadmap

Monitor in the portal. Set eviction policies. Set Alerts. Monitor using Redis tools eg. redis-cli.exe

High Fragmentation

Benchmarking using redis-benchmark.exe

Monitoring Azure Redis Cache

Use latest version Single instance of ConnectionMultiplexer AbortOnConnectFail=false ConnectRetry ConnectionTimeout Large values/ Long running commands

Use multiple Connection Multiplexers for different connection settings.

Client configuration – StackExchange.Redis

Cache Aside pattern Retry logic Local cache

Cache patterns

Multi-Region Scenario

Web Tier

Cache

StorageAzure Region 1

Web Tier

Cache

Azure Region 2

Cache Sync

Multi-Region Scenario

Web Tier

Cache

Azure Region 1

Web Tier

Cache

Azure Region 2

SQL SQL

High Availability

Availability Set

Master

Master

Slave

Slave

Azure Redis

Endpoint [Shim]

High Availability

Availability Set

Slave

Master

Slave

Master

Azure Redis

Endpoint [Shim]

High Availability

Availability Set

Slave

Master

Slave

Master

Azure Redis

Endpoint [Shim]

Roadmap

Scale Up/ Down Configuring Redis – key space notification Persistence Azure Regions

China/ Government Cloud support

Clustering Virtual Network Geo Replication

Roadmap

Pricing Documentation Cache User Voice• Microsoft patterns & practices on Cache Retry logic Investigating Timeout Exceptions in

StackExchange.Redis Memcache protocol shim

Resources

Resources

TechNet & MSDN FlashSubscribe to our fortnightly newsletter

http://aka.ms/technetnz http://aka.ms/msdnnz

http://aka.ms/ch9nz

Microsoft Virtual AcademyFree Online Learning

http://aka.ms/mva

Sessions on Demand

Complete your session evaluation now and be in to win!

© 2015 Microsoft Corporation. All rights reserved.Microsoft, Windows and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or

other countries.MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.