Overview The ScaleArc health monitor notifies that the witness server is unreachable by logging the following alert: HA Alert: Witness server unreachable Further, the ScaleArc logs have the following ...
Overview Proper DNS resolution is vital for the ScaleArc HA (High Availability) service as well as the fencing mechanism to function properly. If any database servers are added to a ScaleArc fencing c...
Overview ScaleArc High Availability (HA) deployments in MSSQL environments reported unsuccessful failover and failing cluster traffic in both nodes after upgrading to the v2020.6 release. This article...
Overview One of the reasons that could cause the HA service to fail, resulting in the lack of active resource sync between the two HA nodes, configured virtual IPs (VIP) disappearing, and ultimately u...
Overview You encounter the following error message when configuring the ScaleArc High Availability settings or when attempting to add the secondary ScaleArc server: Error: 2176Unable to sync NTP serve...
High Availability (HA) allows a pair of ScaleArc servers to function as a redundant cluster. This KB describes the steps to configure High Availability cluster in ScaleArc. Pre-Requisites to configur...
Overview A Split Brain situation is a state where each of the ScaleArc nodes in a HA setup believes it is the only active surviving node. This article provides the steps to quickly recover from a HA ...
Overview The server status (shown below with red arrow) in the Cluster Info section in Live Monitor switches frequently between Red & Green if the alerting service for the AlwaysOn HA cluster isn't co...
Overview The following error may sometimes show up when trying to pair two ScaleArc machines into a HA cluster. Solution Diagnosis This happens if the machines use Active Directory (AD) for authenti...
Overview Memory consumption spiking during the normal operation of ScaleArc will take all the configured clusters offline. Invoking a failover brings up the same issues on the new primary in a few hou...