1. Distributed Cache Dipl.-Ing. Damir Dobric Lead Architect daenet
Microsoft vTSP – Germany Technology Advisor in Business Platform Division – Microsoft Corp. Microsoft Most Valuable Professional

3. Application Architecture
FRONT END
BROWSER
RICH CLIENT …
CLOUD T1
MIDDLE WARE
SERVICES T2
DATA
DATABASE T3

4. Latency Pyramid Memory Network Disk
Windows Azure AppFabric Caching (local cache)
Lowest latency
Network
Windows Azure AppFabric Caching (distributed cache)
Lower latency
Disk
Highest latency
Storage

5. Distributed Caching Scenario
Database
Web
App 1
Web
App 2
Web
Service 1
Distributed In-Memory Cache
Server
Distributed In-Memory Cache
Server
Local Cache
Local Cache
Local Cache

6. High-Level Cache architecture

7. Cluster Configuration
AppFabric Caching
Cache Client
Client Config
Cache Port TCP22233
Cache Host 1
Cache Host 2
Arbitration Port TCP22235
Cluster Port TCP22234 (live tick)
PowerShell
Administration
Cluster Configuration
Replication Port TCP22233

8. AppFabric Caching Cache Host 1 Cache Host 2 Default Cache Named Cache
Region 1
Region 2

9. Important Cache Features
Cache Nodes
Cache Size
Name
TTL (time to live)
Eviction
LRU (last recently used)
LFU (last frequently used)
Notifications
High Availability

10. High Avalability

11. Long mapping x1 y1
f : X -> Y x2 x3 y2 y3
t >> 0 xk yN

12. Multiple long mappings
f1 : X -> Y x1 y1 f1
f2 : X -> Y x2 x3 y2 y3 f2 fq xk yN
fq : X -> Y
tk >> 0, k={1, 2, .. q}

13. Cache Tagging X Table1 Table2 TableM Y y1 tag2 tag2 y3 y2 yN tag2 tag1
f1:=Select * from T1, T2,..
Table1
tag2
tag2
tag1
Table2 y2 y3
f2:=Select * from T3, T2,.. yN
tag2
tag1
TableM

14. Cache Tagging Sample y1 DataCache cache = dcf.GetCache(CacheName);
List<DataCacheTag> tags = new List<DataCacheTag>();
tags.Add(new DataCacheTag(„f1"));
tags.Add(new DataCacheTag(„f2"));
DataCacheItemVersion ver = cache.Add(„Key", 123, tags);
tag1 y1
tag2
tag2
tag1 y2 y3 yN
tag2
tag1
cache.GetObjectsByTag(tags[0])
This is very fast!!

15. Precalculation of fk f1 : X -> Y slow background
cache.GetObjectsByTag(tags[f1]) fast
on-demand
cache.GetObjectsByTag(tags[f2]) fast

16. Demos Windows Server AppFabric Cache Windows Azure AppFabric Cache
Tagging
Deployment
Regions
Emulator
Notifications
Cache Roles

18. 07 Mai
14 Mai
24 Mai
04 June
11 June
18 June
25 June (double session)