1. Iqbal Khan iqbal@alachisoft.com Ph: +1 (925) 236-2125
.NET Performance Solutions
NCache Fast & Scalable .NET Apps in Server Farms Distributed .NET Data Cache Distributed ASP.NET Sessions
Iqbal Khan
Ph: +1 (925)

2. Alachisoft Company History
Founded in California in 1996
Experts in enterprise applications in Java, C++, and .NET
Became Alachisoft in 2003 (product company)
Impressive growth from profitable and revenue-funded model
Headquarters: San Francisco Bay Area
2410 Camino Ramon, Suite 175, San Ramon, CA 94583
NCache launched in July 2005
Current version: 3.8 (8th version)
NCache 3.8

3. Supporting Our Customers
Annual Maintenance & Support
Free upgrades for 1 year
& telephone based support
24x7 Support
Professional Services
Cache Integration: into your existing apps
Caching API Training: for your developers
Cache Configuration Training: for your IT staff
NCache 3.8

4. Main Benefits of NCache
Higher Application Performance & Scalability
Performance: Extremely fast in-memory cache
Scalability:
Reduce pressure on database
Linearly scale out cache cluster
Reliable & Scalable ASP.NET Session Storage
Session replicated for reliability
Fast & scalable session storage
Runtime Data Sharing for Server Apps
Asynchronous data sharing in producer/consumer model
Powerful event notification for app coordination
NCache 3.8

5. Main Uses of NCache Enterprise Distributed Data Cache
Performance & Scalability: Reduce expensive db trips
Reliability: Dynamic clustering & replication
ASP.NET apps, web services, distributed apps, grid computing apps
Distributed ASP.NET Sessions for Web Farms
Faster and more scalable session storage
Reliability: 100% uptime. Sessions replicated.
Easy adoption: No code change required to use
NCache 3.8

6. Enterprise Distributed Data Cache
NCache 3.8

7. High Availability (100% Uptime) Dynamic Cache Cluster
TCP based Cache Cluster
Does not use Windows Clustering
Peer to peer architecture
No single point of failure
Add/remove servers at runtime
Without stopping cache or your app
Data adjusted automatically based on caching topology
Hot Apply config changes
Change config properties while cache is running
NCache 3.8

8. High Availability (100% Uptime) Dynamic Configuration
Connection failover
Auto-connect to other servers
Cluster membership info
Propagate to clients at runtime
Cache topology info
Connection strategy at runtime
NCache 3.8

9. Caching Topologies Mirrored Cache (2-node active/passive)
All clients connect to active node
Passive node becomes active if active node goes down. Clients also automatically connect to it
Mirroring to passive node done asynchronously
Recommended use:
Up to 10 app servers
2 cache server cluster
NCache 3.8

10. Caching Topologies Replicated Cache
Entire cache copied to all servers
Each update done to all servers
Clients connect evenly to all servers. All servers active.
Good for read-intensive scenarios
NCache 3.8

11. Caching Topologies Partitioned Cache
Extremely scalable
Location transparency
Good for larger clusters
Distribution map sent to all clients
No replication available
NCache 3.8

12. Caching Topologies Partitioned-Replica Cache
Each partition has one replica
Async & Sync replication
Location transparency.
Extremely scalable
Reliability due to replication
NCache 3.8

13. Caching Topologies Client Cache
Clustered cache on separate tier
Client has local client cache
Client cache InProc or OutProc
Client cache automatically synchronized with clustered cache
Gives further boost to client apps
Good for read-intensive apps
NCache 3.8

14. Caching Topologies Performance Data (2-node cluster)
Mirrored Cache
30,000 reads/sec
25,000 writes/sec
Replicated Cache
60,000 reads/sec
2500 writes/sec
Partition-Replica Cache
44,000 writes/sec
NCache 3.8

15. Caching Topologies Bridge Topology (for WAN replication)
NCache 3.8

16. Poweful Cache Administration
NCache 3.8

17. Powerful Cache Monitoring
NCache 3.8

18. Important Features Max cache size Eviction policies
To control memory consumption. Evicts item when cache reaches Max Size
Eviction policies
LRU, LFU, Priority, and “Do Not Evict”
Cache security (authenticate + authorize)
Authenticate with Active Directory. Authorize as “Admin” or “User”
Compression
Specify compression threshold. Uses GZip on client-side.
Server Configuration Options
Rejoin a cache cluster upon reboot
Multiple NIC support (one for client/server & one for cluster)
NCache 3.8

19. NCache ASP.NET 2.0 Session State Provider

20. Object Caching API is Simple
Initialize & Dispose the Cache
Cache cache = NCache.InitializeCache(“myReplicatedCache”);
cache.Dispose();
Read from the Cache
object obj = cache.Get(“myKey”);
object obj = cache[“myKey”];
bool isPresent = cache.Contains(“myKey”);
Add to the Cache
cache.Add(“myKey”, obj);
cache.Insert(“myKey”, obj);
cache[“myKey”] = obj;
Remove from the Cache
object obj = cache.Remove(“myKey”);
Clear
cache.Clear();
NCache 3.8

21. Important Object Caching Features
Expirations
Absolute-time + idle-time
Auto-reload data on expiration (if read-thru enabled)
Cache dependencies
Key, file, and custom dependencies
Synchronize cache with database
.NET event notifications (SqlDependency) for SQL Server 2005 & Oracle 10g R2
Polling based for all OLEDB compliant databases
Read-through and write-through
You implement read-thru and write-thru handlers called by NCache
Write has write-behind option that queues up database updates
NCache 3.8

22. Important Object Caching Features
Event notifications (cluster wide)
Register interest in specific cached items to be notified at insert/remove
Register interest to be notified at ALL add/insert/remove (off by default)
Send custom notifications to other NCache clients (cluster wide)
Tagging & Searching Cache
Object Query Language for searching on object attributes
Tagging for arbitrary grouping and searching of cached objects
Pessimistic & Optimistic Locking
Lock/Unlock for pessimistic locking (writer-lock)
Object versioning for optimistic locking (reader-lock)
Bulk operations
Get, Add, Insert, Remove
NCache 3.8

23. Important Object Caching Features
Compact serialization
Mix with regular .NET serialization. Faster and more compact.
Caching Application Block (CAB) integration
NCache implements a cache manager for CAB
No code change required to integrate (only config file changes)
NHibernate integration
Cache provider for NHibernate implemented
Java client
No Java-to-.NET interoperability used. Native NCache socket protocol.
Event notifications available
Object Query Language available
NCache 3.8