Latency protection has two components, its mode, and the latency_high_mark and latency_low_mark which specify when the protection is active or inactive. The latency_high_mark specifies the maximum number of waiting updates in the SRL before the protection becomes active and writes stall or fail, depending on the mode of latency protection.

The latency_low_mark must be a number lower than the latency_high_mark; the latency_low_mark is the number of writes in the SRL when the protection becomes inactive and writes succeed. You can set up latency protection by setting the latencyprot attribute to either override or fail. Setting the attribute to latencyprot=off, which is the default, disables latency protection.

Setting the attribute to latencyprot=fail or override enables latency protection. The following sections explain how VVR controls replication depending on the setting of the latencyprot attribute of the RLINK when the Primary and Secondary either connected or disconnected.

Table: Latency protection and the state of the RLINK summarizes how the state of the RLINK affects the latency protection.