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Show / Hide Table of Contents
  • Programmer's Guide
  • Client Side API Programming
    • Setting Up Development Environment
    • Basic Cache Operations
      • Initialize Cache
      • Add Data to Cache
      • Update Data in Cache
      • Fetch Data From Cache
      • Remove Data From Cache
      • Dispose Cache
    • Bulk Operations
      • Adding Collection to Cache
      • Updating Collection in Cache
      • Retrieving Collection from Cache
      • Removing Collection from Cache
      • Deleting Collection from Cache
    • Asynchronous Operations
      • Using Asynchronous Operations
      • Using Asynchronous Operations with Callback Methods
    • Groups and Subgroups
      • Adding/Updating Data Group in Cache
      • Retrieving Data Group from Cache
      • Removing Data Group from Cache
    • Tagging Data in NCache
      • Creating Tags
      • Adding Items with Tags
      • Retrieving Previously Tagged Data
      • Removing Tagged Items from Cache
    • Named Tags
    • Data Expiration Strategies
      • Using Absolute Expiration
      • Using Sliding Expiration
    • Cache Dependencies
      • Key Dependency
      • File Dependency
      • Notification based Dependencies
        • Database Dependency using SQL Server
        • Database Dependency using Oracle
      • Polling Based Dependency
      • Custom Data Source Dependency
      • Multiple Cache Sync Dependency
      • Aggregate Dependency
      • Add Dependency to Existing Item
      • Using CLR Procedures to Call NCache
    • Locking Data in NCache
      • Locking Items in Cache (Pessimistic Locking)
      • Locking Items with Cache Item Versioning (Optimistic Locking)
    • SQL Reference for NCache
      • SQL Syntax
      • Querying Samples for Operators
      • Querying Data in NCache
      • NCache Language Integrated Query (LINQ)
        • Using LINQ in NCache
        • Configuring LINQPad for NCache
        • Querying NCache Data in LINQPad
    • Event Notifications
      • Cache Level Event Notifications
      • Item Level Event Notifications
      • Custom Event Notifications
    • Publish/Subscribe (Pub/Sub) in NCache
      • Pub/Sub Topics
      • Managing Topics
      • Pub/Sub Messages
        • Message Behavior and Properties
        • Creating a Message
      • Publish Messages to Topic
      • Subscribe for Topic Messages
      • Monitoring Pub/Sub Topics
    • Continuous Query
    • Using Streams in NCache
      • Opening with Stream Modes
      • Adding and Updating Data with Streams
      • Retrieving Data from Streams
      • Closing a Stream
    • Security and Encryption
      • NCache Security
      • NCache Data Encryption
    • Data Compression
    • NCache Management API
  • Server Side API Programming
    • Cache Startup Loader
      • Components of Cache Startup Loader
      • Sample Implementation of ICacheLoader on Single Node
      • Sample Implementation of ICacheLoader with Distribution Hints
    • Data Source Providers (Backing Source)
      • Read-Through Caching
        • Configure Read-Through Provider
        • Using Read-Through with Cache Operations
      • Write-Through Caching
        • Configuring Write-Through Provider
        • Using Write-Through with Basic Operations
        • Using Write-Behind with Basic Operations
        • Using Write-Behind with Bulk Operations
        • Using Write-Behind with Async Operations
        • Monitor Write-Through Counters
    • Custom Dependency
      • Sample Implementation of Custom Dependency
      • Sample Usage of Custom Dependency
    • WAN Replication through Bridge
      • Bridge Configurations
      • Implementing Bridge Conflict Resolver
    • Entry Processor
      • Sample Implementation of IEntryProcessor Interface
      • Sample Usage of EntryProcessor
    • MapReduce
      • Sample Implementation of MapReduce Interfaces
      • Sample Usage of MapReduce
    • Aggregator
      • Sample Implementation of IValueExtractor Interface
      • Sample Implementation of IAggregator Interface
      • Sample Usage of Aggregator
    • Dynamic Compact Serialization
  • Client Side ASP.NET Features
    • ASP.NET
      • ASP.NET Session State Provider for NCache
      • Multi-Region ASP.NET Session State Provider for NCache
    • ASP.NET Core
      • Session Storage in ASP.NET Core
        • Configure NCache ASP.NET Core Session Provider
        • Configure ASP.NET Core Sessions with NCache IDistributedCache Provider
      • Multi-Region ASP.NET Core Session Provider for NCache
      • Object Caching in ASP.NET Core
    • ASP.NET SignalR
      • Using NCache Extension for SignalR
    • View State Caching
      • Configuring and Using Content Optimization
      • Group View State with Sessions
      • Limit View State Caching
      • Perform Page Level Grouping for View State
    • ASP.NET Output Cache
      • Configure ASP.NET Output Caching
      • Using ASP.NET Output Cache with Custom Hooks
  • Client Side Third Party Integrations
    • Migrating AppFabric to NCache
      • AppFabric API vs. NCache API
    • NHibernate
      • NCache as NHibernate Second Level Cache
      • Using NHibernate Query Caching
      • Configuring Database Synchronization with NHibernate
    • Entity Framework Caching Integration
      • NCache as Entity Framework Second Level Cache
      • Entity Framework Caching Config File
    • Entity Framework Core Caching
      • Installing NCache Entity Framework Core Provider
      • Configuring NCache Entity Framework Core Provider
      • Using NCache Entity Framework Core Provider
        • Caching Options for EF Core Provider
        • LINQ APIs for EF Core Provider
        • Cache Only APIs for EF Core Provider
        • Query Deferred APIs for EF Core Provider
      • Logging in NCache Entity Framework Core Provider
    • Memcached
      • NCache Memcached Gateway Approach
      • Memcached Client Plugin for .NET
    • Debug NCache Providers in Visual Studio
    • NCache for Visual Studio Extension

ASP.NET

You can quickly use clustered sessions in your existing ASP.NET applications without any code change and can immediately see a performance boost in your application. NCache provides high performance in-memory ASP.NET session clustering for web farms that is faster and more scalable than storing them in a database. It is faster because sessions are kept in memory and closer to the ASP.NET application. And, it is more scalable because sessions can be distributed to multiple servers in the farm that can better handle larger load than a database server.

With NCache, you can eliminate the need to use sticky sessions in your load balancer. This significantly improves your application scalability. NCache provides powerful dynamic clustering of sessions. You can replicate or distribute/partition sessions either locally on multiple web servers or on multiple dedicated session caching servers. NCache offers a rich set of features to grow you session clustering from small to large web farms.

ASP.NET Session-State allows for storing session data into custom data source by implementing SessionStateStoreProviderBase class. A session-state store provider has been implemented using NCache to store data into distributed cache.

NCache based Session-State store provider has the following benefits:

  • No Code Change: NCache Session State Provider can be used in an application without any code change.

  • Better Performance: Session data being stored in in-memory cache yields maximum performance.

  • Reliability: By default session is stored in memory of ASP.NET process. If process recycles or application server goes down, session data is lost. With NCache, session data is stored, outside of ASP.NET process, in cache cluster. Any cache topology can be opted to meet the needs of reliability. So in case the application server goes down, session data remains available when ASP.NET process recycles back or application server comes back.

  • No Need of Sticky Sessions: Using NCache Session State Provider will eliminate the use sticky sessions in load balancer.

  • NCache Cache Storage-Scalability: NCache Session State Provider uses NCache cache as storage. Here cluster cache can be used to gain better scalability. Working with it allows adding more servers to session cluster at runtime; it results in more scalability and reliability for the application. ASP.NET session clustering for web farms is faster and more scalable than storing them in a database.

  • Availability, Load Balancing, Fault Tolerance: In a web farm environment, it provides better fault tolerance by keeping session data available at all server nodes in cluster cache to better handle a larger load. This is because sessions can be distributed to multiple servers in the farm. Thus it is safe to say that it results in a high performance. It is suitable for session clustering from small to large web farms.

  • Cluster Topologies: For session cache, different clustering topologies can be used. Replicated topology offers load balancing of client so that the web application does not suffer during intensive traffic. If partitioned-replica cache is used, it gives high scalability, high reliability to the application and is extremely fast. Sessions can be replicated or distribute/partitioned either locally on multiple web servers or on multiple dedicated session caching servers. For cache topology details, see section Cache Topologies.

  • Serialized Data: Session data needs to be in serializable form.

  • Session Lookup in Cache Made Easy: All session data in cache can be retrieved in a single call. NCache provides tag with session. In one single operation all session data with tag can be easily fetched.

  • Exclusive Locking: To avoid deadlock and data integrity issue, exclusive locks are provided in NCache Session State Provider. Locking is configurable and in default is off.

  • Locking Release Retry: If exclusive lock is used, locking retries are also configured. In case of concurrent requests, lock release is tried a configured number of times.

  • Location Affinity: NCache’s Session State Provider 's Location Affinity manages ASP.NET session state across multiple web farms which are geographically separated. For Location Affinity, one 'primary' and one or more 'secondary' caches have to be specified for each web farm. The primary cache will be used for all local traffic, in local region and secondary cache(s) are of distant geographical regions. These are configured in the application's Web.config. This optimization is possible only in .NET 2.0 and later versions.

In This Section

ASP.NET Session State Provider for NCache
Explains how sessions can be stored using NCache's Session State Provider for ASP.NET.

Multi-Region ASP.NET Session State Provider for NCache
Explains how the location affinity feature in NCache can be configured for web farms using clustered caches distributed across multiple regions.

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