MultiSite Cluster Ortamlarında Heartbeat Ayarları

Multisite cluster ortamlarda nodlar arasındaki network erişim değerleri düşük olması veyahut cluster üzerinde bulunan uygulamanın ciddi anlamda network erişimi olduğu durumlarda private ve public interface değerleri default değerlerinde ise nodlar birbirleri ile görüşememekte ve failover durumu yaşabilmektedir. Bu değerlerin arttırılması için aşağıdaki komut setleri kullanılmalıdır.

Heartbeat Configuration

By default, regardless of subnet configuration, heartbeat frequency (also known as subnet delay) is once every second (1000 milliseconds). The range for heartbeat frequency is once every 250-2000 milliseconds on a common subnet, and 250-4000 milliseconds across subnets. By default, when a node misses a series of 5 heartbeats, another node will initiate failover, and the range for this value (also known as subnet threshold) is from 3 through 10.

· If in step 2 you decided to change the heartbeat settings, run one or more of the following commands. Note that the first two commands affect nodes on a common subnet and the second two commands affect communication across subnets:

cluster /cluster:<ClusterName> /prop SameSubnetDelay=<value>

cluster /cluster:<ClusterName> /prop SameSubnetThreshold=<value>

cluster /cluster:<ClusterName> /prop CrossSubnetDelay=<value>

cluster /cluster:<ClusterName> /prop CrossSubnetThreshold=<value>

· To confirm that the heartbeat settings are set as intended, run the following command:

cluster /cluster:<ClusterName> /prop

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