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--- litespeed_wiki:lslb:ha [2020/08/12 13:03]
Jackson Zhang
+++ litespeed_wiki:lslb:ha [2020/08/12 18:44]
Lisa Clarke [Syncing Cache Between Two HA Nodes] Editing
@@ Line 231: / Line 231: @@
 ===== Syncing Cache Between Two HA Nodes =====
-Regarding what syncs and what does not, the two HA ADCs don't sync configuration between each other hence each one will still need to be manually configured independently to serve the same sites. Only lscache related data can be synced among two ADCs.
 Cache purge is automatically synced between two HA nodes. When a node receives a purge request, the cached file will not be deleted immediately. It will be regenerated when a new request for that URL is received.
@@ Line 241: / Line 239: @@
 When replication is enabled, caches are synced between the HA ADC nodes. When the backend LiteSpeed Cache plugin sends a cache request to the live ADC, that request will be synced with the nodes.
-**Please note**: Replication happens only between two front end High Availability ADCs, and //not// backend cluster web servers. Avoid caching on the cluster-server-node layer, as cached data within web server nodes will not be purged properly and will no longer be synchronized. In a clustered environment, LSCache data should //only be maintained at the ADC layer//.
+**NOTE 1**: Replication happens only between two front end High Availability ADCs, and //not// backend cluster web servers. Avoid caching on the cluster-server-node layer, as cached data within web server nodes will not be purged properly and will no longer be synchronized. In a clustered environment, LSCache data should //only be maintained at the ADC layer//.
+**NOTE 2**: Only LSCache data is synced between two HA ADCs. //Configuration is not synced//. Therefore, the ADCs must be manually configured independently to serve the same sites.
 ===== Troubleshooting =====