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Replicated Store: Configuration
Configuration Options Advanced Configuration Options Related Tasks Related Topics
Use this page to configure a Replicated Store for storing subsystem data, such as persistent JMS messages or Store-and-Forward messages.
A WebLogic Replicated Store is a high performance storage option for Exalogic hosted Weblogic Messaging Services and is an alternative to WebLogic Server’s File and JDBC persistent storage options. Replicated stores depend on Exalogic replicated memory that is managed by a separately administered Daemon Cluster that must be started before a WebLogic Replicated Store can boot.
Configuration Options
Name Description Name The name of this replicated store. This name must be unique within a WebLogic domain.
Target The server instances, clusters, or migratable targets defined in the current domain that are candidates for hosting a file store, JDBC store, or replicated store. If scoped to a Resource Group or Resource Group Template, the target is inherited from the Virtual Target.
When selecting a cluster, the store must be targeted to the same cluster as the JMS server. When selecting a migratable target, the store must be targeted it to the same migratable target as the migratable JMS server or SAF agent. As a best practice, a path service should use its own custom store and share the same target as the store.
MBean Attribute:
ReplicatedStoreMBean.TargetsDirectory Specifies the path of the Replicated Store Global Directory.
This must be the same directory that is used to store the Daemon Cluster
rs_daemons.cfgconfiguration file and requires a specially tuned NFS mount. Oracle recommends using an absolute directory path on a shared NFS mount.MBean Attribute:
ReplicatedStoreMBean.DirectoryChanges take effect after you redeploy the module or restart the server.
Advanced Configuration Options
Name Description Local Index Specifies a local Daemon to attach to when a Daemon Cluster has multiple Daemons configured to run on the current node.
The local Daemon is chosen using the formula: ((localindex) modulo (number-of-local-daemons)). When 0, it always resolves to the first available Daemon entry in the
rs_daemons.cfgfile that has an address on the current node. The default value is 0.This setting is not applicable to production environments. To ensure high availability, a Daemon Cluster in a production environment should have multiple nodes with one Daemon on each node.
MBean Attribute:
ReplicatedStoreMBean.LocalIndexMinimum value:
-1Maximum value:
65535Changes take effect after you redeploy the module or restart the server.
Region Size The region size, in bytes.
Data is stored in one or more uniquely named Regions within a Daemon Cluster where each region is created with this size. Oracle recommends that regions sizes should be tuned to be a small fraction of the available local Daemon memory.
MBean Attribute:
ReplicatedStoreMBean.RegionSizeMinimum value:
33554432Maximum value:
1073741824Changes take effect after you redeploy the module or restart the server.
IO Buffer Size The I/O buffer size, in bytes, automatically rounded down to the nearest power of 2.
Controls the amount of WebLogic Server JVM off-heap (native) memory that is allocated for a replicated store.
For the best runtime performance, Oracle recommends setting
IOBufferSizeso that it is larger than the largest write (multiple concurrent store requests may be combined into a single write).For the best boot recovery time performance of large stores, Oracle recommends setting
IOBufferSizeto at least 2 megabytes.MBean Attribute:
ReplicatedStoreMBean.IoBufferSizeMinimum value:
-1Maximum value:
67108864Changes take effect after you redeploy the module or restart the server.
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