What does the Data Sync process do ?

[Hallask]

Morning All.

What does the data sync process (which uploads the data in the Proxy to the main Zabbix Server) do ?

I have Oracle as the backend (we've got a site license for this !!), and am trying to move the DB's from a two node to a three node Oracle Cluster.

All well and good, except the Data Sync process grinds to a extremly slow speed.

Does the Data Sync just uploads the contents of the proxy_history table ?
(or just a partial copy - specific rows for example, or fields)

Or are there other tables uploaded to the main server as well ?

(am thinking I could drop this Data Sync process, and use something like Oracle GoldenGate which replicates tables easy enough)

[cyber]

Data sender does exactly, what it says... Sends gathered data to server. And no its not table copy. Data is formatted, sent to trapper process in server side (that's the 10051 listening port there) and then processed by server side. And processed data is also removed from proxy DB.

Do you have any errors in proxy log? What versions are we talking about? I would look for other DB to use, as from v7 Oracle will be deprecated (but can still be used) and will be removed in upcoming versions...