NCache 4.4 - Online Documentation

Creating a New Cache Cluster

 
Clustered Cache can be created in the following two ways:
 
Using NCache Manager
 
  • From the 'File' menu select 'New' -> 'Clustered Cache'.
 
 
  • A New Clustered Cache Wizard will appear. Specify the name of cache and click Next.
 
 
  • In Select caching topology dialog, select the required cache topology.
Cluster Caching Topologies: Mirrored cache is a cluster of two nodes (Active and passive), where all operations are performed on active node while the passive node is updated asynchronously. Passive node is promoted to active node as soon as the active node goes down. The Partitioned scheme partitions the data across the cluster, whereas the Replicated scheme provides data replication on all the nodes. Partitioned Replica scheme is same as a regular partitioned cache but it allows you to have replicas for each partition, replication can be done either synchronously or asynchronously.
Operation timeout (sec): The maximum time in seconds during which a clustered operation must be completed, otherwise the operation will fail.
Statistics replication interval (sec.): The time interval in seconds after which a node sends its statistics to all the other nodes in the cluster.
 
 
  • In case of Partitioned Replica cache you can have the choice to select the replication strategy for your cache using the screen shown below. Replication Strategy screen will only be encountered in case of POR.
Replication Strategy: Replication Strategy is defines as how the data is replicated to the backup node. It can be Synchronous or Asynchronous.
  • Asynchronous replication: In Asynchronous replication data operations are replicated asynchronously to the backup node.
  • Synchronous replication: In Synchronous replication data operations are replicated synchronously to the backup node.
 
 
 
  • Specify the node IP address in text box or select from the Network Neighborhood and click on the ‘>’ button to add it in the Selected Nodes list. Click Next once all the required nodes are added.
 
 
  • Change the Cluster Port if required. Click Next.
 
 
  • In the next dialog, you can change the cache size if required. Click Next.
  • In Advanced options dialog, you can configure the following settings:
 
Eviction Policy: Specifies the eviction policy to determine which items are to be removed from cache, if it is full, to accommodate new items. You can change the eviction policy. Eviction policy will be configured but if you want this feature, then you have to turn it on after cache creation.
Eviction percentage: Specifies the percentage of items to be removed on each eviction. It can also be changed. Items will be evicted from cache using this percentage value if eviction is enabled.
Clean Interval: The periodic interval after which the expired items are removed from the cache. Its default value is 15 sec.
Start this cache on finish: If this check box is checked then this new cache will start automatically as you click the finish. Using “Auto start this cache on service startup” option, user will be able to mark the cache as a startup cache which will be started on cache service startup. 
 
 
  • Click on the Finish button. Created cache will appear in Cache Explorer under Clustered Caches section.
 
Using Command Line Tool
 
  • Open command prompt
  • Go to the NCache tools directory: cd %NCHOME%/bin/tools
  • Use createcache.exe, provide the required information: 
createcache.exe ClusteredCache /s test3 /S 250 /t replicated /C 7818
  • Hit ENTER key, it will create ClusteredCache of replicated topology on server test3 with size 250mb using 7817 port.
 
    See Also
Creating Local Cache | Adding an Existing Cache Cluster | Configuring Basic Cache Settings | Cache Management operations | Monitoring Cache Operations
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