Embed Size (px)
Citation preview
Cloud editionCachingRADU PINTILIELIVIU MAZILU
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
CODECAMPChallenges in distributed applicationsSQL Azure FederationHDInsightDocumentDBAzure Search
Previous subjects
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
What are we going to discussCaching fundamentalsAzure and cachingRedisPatternsCase Scenarios
Caching: Cloud edition
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
Why would we cache?Decrease load on databaseStore data close to the applicationSpeed up data accessScale-out applications
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
What is expected of a cache?Caching fundamentals
- Key/value CRUD - Store any entity type (no special attributes) - LRU / absolute / sliding evictions- Concurrent access - Cache per application (multitenant)
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
Nice to have featuresCaching fundamentals
- Bulk operations - Enumeration and queries - Clustering and replication for high-availability - Change notifications - Transactions - Data persistence
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
Caching in AzureApp-FabricIn-Role CacheManaged Cache serviceAzure Redis Cache
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
RedisOpen sourceKey-value cache and storeIn-memorySingle-threaded (atomic operations)Server, can do master/slaveKnows as: data structure server
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
FeaturesStores entities, lists, and sets Item eviction (LRU, absolute, and sliding) Item locking Atomic transactions for groups of commands Bulk operations
REDIS
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
KeysBinary safeShould not be very long or very shortShould stick to a pattern for keys:
users:1:posts posts:10:tags
Db:Tags
REDIS
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
Data typesStringSetListSorted setHash+bitmap, hyperloglog
REDIS
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
Eviction policiesnoevictionallkeys-lruvolatile-lruallkeys-randomvolatile-randomvolatile-ttl
REDIS
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
Additional featuresLua scriptingCache can be persisted periodically(RDB) or consistently(AOF)Built-in Pub/Sub messagingSharding/partitioning
REDIS
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
Azure Redis CacheFully managed service (PaaS)Guaranteed SLAProvides SSLVertically scalable: changing tiersHorizontally scalable: adding shardsVirtual networks
REDIS
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
PatternsOn Demand / Cache AsideBackground Data PushCircuit Breaker
CACHING
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
Demos topicsStack Overflow tagsCache asideAutocompleteLua script usage
REDIS
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
SCENARIOSAzure hosted applicationsMulti-level caching
output cachesession state
precomputed dataHybrid applicationsHigh performance, scalable environments
USE CASE
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
What we discussedCaching fundamentalsAzure and cachingRedisPatternsScenarios
Caching: Cloud edition
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
Questions
?
April 23, 2016Caching: Cloud edition
© EXPERT NETWORK
THANK YOU
