Protecting data during a power outage

To protect Virtuozzo Hybrid Infrastructure against power outages, it is recommended to use an Uninterruptable Power Supply (UPS) for all servers and network switches.

Additionally, you can prevent data loss and preserve data integrity by using enterprise-grade SSD drives. Unlike HDD drives, enterprise-grade SSD drives can properly handle power loss events. Enterprise-grade SSD drives that operate correctly usually have the power loss protection property in their technical specification. Some of the market names for this technology are Enhanced Power Loss Data Protection (Intel), Cache Power Protection (Samsung), Power-Failure Support (Kingston), and Complete Power Fail Protection (OCZ).

It is also recommended to ensure that all storage devices that will be added to your cluster can flush data from cache to disk in case of a power outage. You can check the data flushing capabilities of your disks, as explained in Checking disk data flushing capabilities.