Iasi codecamp 20 april 2013 Caching - oldie but goldie - Raluca Breaur

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Codecamp Romania

Technology

CACHING
Oldie but Goldie
Raluca Breaur
20th of April 2013

“There are only two hard things
in Computer Science:
cache invalidation
and naming things.”
Phil Karlton

Stale data strategy
Time to live
Time to idle

Eviction algorithms
LFU – Least Frequently Used
LRU – Least Recently Used
FIFO
…

Cache performance - Statistics
Hits
Misses
Size
Average GetTime
Eviction Count

Common Data Patterns
Locality Hot Set Data
changes
Catalog
(Countries) Low Low Low
Inventory
(Stocks) High High High
Conversation
(Shopping Cart) High High Low

Caches around us
Browser cache
Use cache control headers: max age, no cache

Database
• Persistence Layer – JPA – 2 layers of cache

High computation
Service – Spring 3.1 Cache Abstraction
JCache

Web Service / 3rd party
Multiple clients - Standalone Cache Server
Service – Spring 3.1 Cache Abstraction/JCache

Cache Providers - JCACHE
java.util.Map GUAVA caches

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