Digital Object Architecture - Erpanet
Digital Object Architecture - Erpanet
Digital Object Architecture - Erpanet
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Mirroring<br />
Local Handle Service<br />
Primary Site<br />
Server P 1<br />
Server P 2<br />
Secondary<br />
Site "A"<br />
Server S A1<br />
Server S A2<br />
Each server P 1- P 3 "knows" which<br />
handles in its transaction log hash to<br />
which secondary server, and sends them.<br />
Each secondary will continue to<br />
request updates on a regular basis.<br />
The request is made in the form of<br />
"all transactions since transaction X".<br />
Server P 3<br />
Secondary Site "B"<br />
Server S B1<br />
Server S B2<br />
Server S B3<br />
Server S B4<br />
Corporation for National Research Initiatives
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