Disaster Recovery
Disaster recovery includes data recovery and site recovery. Data recovery is how you protect and restore your data. Site recovery is how you protect and restore your entire site, including your data.
Data recovery is facilitated with the hypervisor’s shared storage and Pervasive PSQL transaction logging and transaction durability. See
Transaction Logging and Durability
. You can use transaction logging and transaction durability with Pervasive PSQL Server and Server Vx.
Site recovery can be accomplished with both Pervasive PSQL Server and Server Vx. With Pervasive PSQL Server, a separate product key is required for a physical machine. If the recovery involves a VM from the original site, the Pervasive PSQL product key changes to “failed validation” state when the VM boots. The database engine runs for a limited time (the failed-validation period) with a key in failed validation. Provided that you migrate back to the original host before the failed-validation period expires, the database engine operates normally. However, with site recovery, the original host may be lost.
Pervasive PSQL Vx Server operates normally provided virtual MAC addresses and host names remain the same in the recovered site VM as they were in the original VM. The product key remains in the “active” state.
No special steps are required to install or configure Pervasive PSQL in a disaster recovery environment. Refer to the hypervisor documentation.