The primary ZEO server is writeable like a normal ZEO server and provides it's updates to host:port defined in: replicate-to
[zeo] recipe = plone.recipe.zeoserver[zrs] eggs = Plone plone.recipe.zeoserver[zrs] zeo-address = 8000 replicate-to = 10.0.0.10:9001 replicate-from = keep-alive-delay = 120
The sencondary ZEO server is read only and gets it's update from the primary ZEO server defined in: replicate-from
[zeo] recipe = plone.recipe.zeoserver[zrs] eggs = Plone plone.recipe.zeoserver[zrs] zeo-address = 8000 replicate-to = replicate-from = 10.0.0.10:9001 keep-alive-delay = 120
You can use the secondary ZEO server in readly mode, for example to have a readonly copy for a external website, where the writable instances are more protected behind the scene. Or you could use it to distribute the load of ready requests.
