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--- admin:ha [2019/01/24 12:18]
veera created
+++ admin:ha [2019/01/24 12:28] (current)
veera [Data replication]
@@ Line 7: / Line 7: @@
 You need an identically sized backup installation of Trisul that can takeover the load in the event of a primary failure.
-{{:admin:haprimarybackup.png?600|}}
+  * Download the replication scripts [[https://trisul.org/download/sync.sh|sync.sh]] and [[https://trisul.org/download/host_alive.sh|host_alive.sh]]
+{{:admin:haprimarybackup.png?400|}}
+===== Configure SSH between the primary and backup nodes =====
+On both the primary and backup node use [[https://www.ssh.com/ssh/copy-id|ssh_copy_id to allow login]] without an interactive password.
 ===== Data replication =====
@@ Line 40: / Line 48: @@
 ===== Takeover =====
-The keepalive uses a PING to check the reachability of the primary node. When a configured number of PINGs fail, the backup starts the Trisul HUB ad PROBE processes and this takes over the primary function.
+The keepalive uses a PING to check the reachability of the primary node. When a configured number of PINGs (default 6 PING failures) fail, the backup starts the Trisul HUB ad PROBE processes and this takes over the primary function.

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