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Show / Hide Table of Contents
  • Administrator's Guide
  • NCache Architecture
    • Cache Topologies
    • Cache Cluster
    • Local Cache
    • Cache Client
    • Client Cache
    • Data Load Balancing
    • Cache Server Backward Compatibility
    • Client Backward Compatibility
    • Eviction
    • Indexing
    • Runtime Data Sharing
    • Portable Data Types
    • Class Versioning
    • IP Binding with Multiple NICs
    • Graceful Node Down
    • Separate Cache Host Process
    • Self Healing Dynamic Clustering
  • Configuring Caches
    • Create Cache
      • Creating Local Cache
        • Create New Cache
        • Add Existing Cache
      • Creating Clustered Cache
        • Create New Cache Cluster
        • Add Existing Cache Cluster
    • Remove Cache
    • Clear Cache Contents
    • Adding Server Node in Cache Cluster
    • Removing Server Node from Cache Cluster
    • Configuring Basic Cache Settings
      • Cache Size
      • Cache Isolation Levels
      • Cache Data Expiration
      • Cache Data Format
    • Configuring Cache Cluster Settings
      • Ports
      • Operation Timeout
      • Static Replication Interval
      • Connection Retries
      • Retry Interval
    • Add Test Data to Cache
    • Deploy Providers
    • Configuring Query Indexes
    • Registering Classes for Compact Serialization
      • Registering Non-Generic Classes
      • Unregistering Non-Generic Classes
      • Registering Generic Classes
      • Registering Generic Classes Using Generic Type Handler
    • Registering Classes for Portable Data Sharing
    • Configuring Data Source Providers
      • Read-Through Provider
      • Write-Through Provider
      • Write-Through Provider for Write-Behind Operations
    • Configuring Cache Startup Loader
    • Configuring Cache Level Events
    • Configuring Cache Activity Events
    • Configuring Eviction Policy
    • Configuring Compression
    • Configuring Email Notifications
    • Binding Cluster and Client/Server IP with Multiple NICs
      • Binding Cluster with a Dedicated IP
      • Binding Client/Server with a Dedicated IP
    • Configuring Heartbeat
    • Configuring MapReduce
    • Configuring Communication Reliability
    • Auto Start Cache on Boot
    • Nagling
    • Dual Socket
    • Error Logging
    • Configuration Files
      • Client Side Configurations
        • Client Config
        • EFCaching Config
      • Server Side Configurations
        • Cache Config
        • Bridge Config
        • Security Config
      • Cache Server Configuration
  • Management Operations
    • Start Cache
    • Stop Cache
    • Restart Cache
    • Manage Cache Service on a Server Node
    • Apply Configuration
    • Hot Apply Configuration
    • Reset Configuration
    • Data Load Balancing
  • Configuring Cache Clients
    • Adding Client Node in Cluster
    • Removing Client Node from Cluster
    • Configuring Client Node Settings
    • Creating Client Cache
    • Enable Client Cache on Client Nodes
    • Disable Client Cache on Client Nodes
    • Removing Client Cache
    • Configuring Client Cache Settings
  • Configuring Security
    • Configuring Security for Cache Management
    • Configuring Security for Cache
    • Configuring Security for Client Nodes
    • Configuring Encryption for Cache
    • Configure SSL/TLS Encryption in NCache
  • Configuring Bridge for WAN Replication
    • Creating Clustered Bridge
    • Adding Clustered Caches to Bridge
    • Configuring Bridge Settings
    • Configuring Conflict Resolver
    • Changing Cache Syncronization Modes
    • Configuring Master Cache
    • Force State Transfer
    • Connect/Disconnect Cache in Bridge
    • Remove Cache from Bridge
    • Bridge Management
  • NCache on Docker
    • Using NCache Docker Images
    • Customize NCache Dockerfile
  • Monitoring NCache
    • Cache Counters
    • Monitoring Caches using NCache Manager
      • Changing Management Port of Cache Node
      • Configuring Counters to Display
      • Browse Cache Statistics
      • Cluster Health
      • Monitoring Cache Clusters using NCache Email Alerts
    • Monitoring Caches using NCache Monitor
      • Monitoring with Built-In Dashboard
      • Monitoring with Custom Dashboard
    • Monitoring Bridge using NCache Manager
    • Monitoring NCache using Windows PerfMon Tool
      • Monitoring Cache Server Counters Using PerfMon
      • Monitoring Cache Client Counters Using PerfMon
      • Monitoring Bridge Counters Using PerfMon
    • Logging in NCache
      • NCache Log Viewer
      • NCache Monitor Logging
      • Performance Counters Logging
      • Windows Event Logging
      • Email Notifications on NCache Events
      • Cache Server Logging
      • Client Side API Logging
      • Cache Event IDs
    • Troubleshooting NCache Monitoring
      • Computer Name Not Found
      • Diskperf Not Installed
      • No READ Access to the Perflib Subkeys
      • Unable to Connect to Remote Server
    • IPV6 Support
  • Upgrading NCache Versions
    • Live Upgrade NCache Version
    • Upgrade NCache Version Offline
  • Apply Windows Patches on NCache Server

Configuring Bridge for WAN Replication

Remote data replication is a critical component for any plan to ensure effective and efficient protection of data and rapid recovery from a major interruption. Synchronous replication of data is good internally for the cluster but its impact on performance becomes a significant consideration when two clusters of cache are geographically separated. Bridge topology is designed for the scenarios, which involve replication of data from one on-site cache(s) to another on-site/off-site cache(s) across the WAN for disaster recovery. Due to asynchronous replication, all clients connected to the active cache(s) get an impression that the operations are being performed on the active cache while a complete backup is taken to the other cache(s) seamlessly.

When an operation is performed on the source cache, it is asynchronously handed over to the bridge cache. This operation is then queued in a queue maintained by the bridge cache. Operations from the queue are transferred to the target cache when bridge finds the target cache available and ready to accept operations. With the bridge topology, it is ensured that:

  • There is no performance degradation.
  • Operations are performed in same sequence as they were on original cache.
  • Operations are not lost in case of connection failure.

NCache provides the following Bridge topologies:

  • Active-Passive (one Active and one Passive Cache)
  • Active-Active (two Active Caches and no Passive Cache)

Active-Passive

This bridge topology has one active and one passive cache.

Three NCache Clusters participate in Active-Passive topology:

  1. An active cache (replicated, partitioned, mirrored or partitioned-replica), where all clients connect and perform read and write operations.

  2. A passive cache (replicated, partitioned, mirrored or partitioned-replica), where all operations performed on the active cache are replicated. Clients can connect to passive cache and perform both read and write operations but those operations are not replicated to the other cache. Modifications can be done at passive cache if required.

  3. A bridge cache between the active cache and the passive cache.

Active-Active

This bridge topology has two active caches but no passive cache.

Three NCache Clusters participate in the Active-Active topology:

  1. Two active caches (replicated, partitioned, mirrored or partitioned-replica), where all clients connect and perform read and write operations. Here any updates to the cache are applied asynchronously to the other cache.

  2. A bridge cache between both the active caches.

Note

This feature is only available in NCache Enterprise edition.

This section explains what is bridge, the operations that can be performed on a bridge and describes how to configure different bridge settings.

In This Section

Creating Clustered Bridge
Explains how to create a clustered bridge.

Adding Clustered Caches to Bridge
Explains how to add clustered caches to the bridge.

Configuring Bridge Settings
Describes what are basic bridge settings and how can they be configured.

Configuring Conflict Resolver
Explains how the conflict, if occurred in bridge operations, can be resolved.

Changing Cache Synchronization Modes
Explains how to change the synchronization mode of clustered cache connected to the bridge

Configuring Master Cache
Explains how an active cache (connected to a bridge) can be made a master cache.

Force State Transfer
Explains how to carry out state transfer explicitly between master cache and bridge.

Connect/Disconnect a Cache
Explains how to connect/disconnect a running cluster to bridge

Remove a Cache from Bridge
Explains how to remove a cache from bridge once it is stopped.

Bridge Management
Explains different bridge management operations and their usage.

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