1. SQL Server Fault Tolerance

2. Facts  ETERE is deeply related to Sql server  A fault on it could stop all the work (except automation & instant editor)  To achieve the best reliability a Cluster server is required  On top of this ETERE has a ‘disaster recovery’ capability  Etere can use and update 2 group of servers to offer a complete disaster protection

3. Cluster server Disaster recovery Replica every X hours Diagram

4. How it works  ETERE is connected with a mirrored cluster server or a main server  If the main server crash the automation is still on air  One operator ‘declare’ to connect to backup  All other editor, recording etc. connect to the backup server  The running schedule is on the automation engines so it’s not lost  Only the last xx minutes info may be lost

5. Summary  According to your budget and safety requirement you can choose A cluster server A main and baclup server ( godd value for money) A cluster server main and a single server as disaster recovery