Top 8 High Availability Clustering Tools
Windows Server Failover ClusteringVeritas InfoScale AvailabilityDRBDHPE ServiceguardIBM PowerHA System MirrorDxEnterpriseIBM Platform Computing LSFSwarm64
The reliability is pretty good.
The most valuable feature is the ability to easily create clusters supporting geo-redundancy.
It integrates well with other solutions.
HPE Serviceguard is stable, it has high availability for production.