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Bunker replication support for shared disk groups in a Cluster Server environment
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New attribute SetFSPrimary for PostgreSQL secure file system (SecureFS) support
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New secure configuration file format for storing SecureFS configuration data
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Single Click Recovery to improve SecureFS recovery mechanism
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New attribute EnableSingleWriter to enhance replication performance for single node failover applications
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Application monitoring on single-node clusters in VMware environments
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Veritas High Availability Configuration wizard is no longer available
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Ability to attach regional disks in read-only mode in GCP environments
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New attributes cache and cachesize added to the vradmin startrep command
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Added support for OpenShift virtualization guest environments
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Added support for OpenStack virtualization guest environments
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New attribute EnableSingleWriter to enhance replication performance for single node failover applications
To enhance replication performance for single node failover applications, a new EnableSingleWriter attribute is introduced in the RVGSharedPri replication agent.
In clustered replication (CVR) environments, application writes are performed by each application cluster node, but SRL log position management and data replication are handled by the Logowner node. The Logowner node reads SRL log positions from disk before replication.
For single node failover applications, all read/write operations are performed by the single application on that same node; classifying it as a “single writer” application.
VVR is enhanced for better replication throughput for such applications. The EnableSingleWriter attribute enables or disables the Single Writer feature. When enabled, the agent transfers the Logowner role to the single node where the application service group is online and all the VVR replication writes are sent from that node. This eliminates the SRL disk readback overhead by allowing the Logowner node to read SRL metadata directly from memory, resulting in improved throughput.
Refer to the following for more details:
- InfoScale 9.0 Replication Administrator’s Guide - Linux for information about Single Writer.
- Cluster Server 9.0 Bundled Agents Reference Guide - Linux for information about the RVGSharedPri agent.
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