Quality of Service Mirroring Timeout Configuration
The Quality of Service (QoS) timeout determines how long a Mirror configuration of Caché will tolerate a loss of connectivity between its members. However, the exact method by which it does this and what that means for someone looking to configure this setting on their own system is not entirely obvious. For example, InterSystems released an alert in April of 2015 detailing the consequences of having a shorter QoS timeout on virtualized systems and our decision to change the default value of QoS from 2 seconds to 8 seconds in newer



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