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Microsoft’s SAP ERP (R/3) System (cont)

Automatic Failover is supported by SAP due to automatic reconnect mechanism and usage of SNAC

Learning out of DBM’s automatic failover:

Was reliable in all the cases. Executed nearly 10 times in 2 years due to e.g. database server hardware or storage issues

Covered all incidents on the storage side, MSCS would have fallen victim of

Force Failover for purpose of server patching still does require small downtime – Business simply doesn’t buy in into chance of rolled back transactions

Need to setup two different sets of scheduled tasks and enable/disable them manually or develop own automatism using e.g. WMI

DBA-416M• ISV configurations & implementations – Lessons Learned

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