Database Mirroring with Automatic Failover || High Availability mode in SQL server || Ms SQL

Automatic failover is supported only in database mirroring sessions running with a witness in high-safety mode (high-safety mode with automatic failover).

In high-safety mode with automatic failover, once the database is synchronized, if the principal database becomes unavailable, an automatic failover occurs.

An automatic failover causes the mirror server to take over the role of principal server and bring its copy of the database online as the principal database. Requiring that the database be synchronized prevents data loss during failover, because every transaction committed on the principal database is also committed on the mirror database.

For automatic failover to improve reliability, the mirror and principal databases must reside on different computers.

Hardware & Software requirements

[Myyutubee]

Thank you for your efforts and sharing knowledge. It will be very helpful.

[ShahriarMohammadShoyeb]

Thank you for your effort. I really appreciate your sharing knowledge and helped me a lot.

[edendavodbetossib]

thank you for everything . It was really helpful

[HARISHREDDY-knqe]

If we are upgrading sql server from 2012 version to 2014 version which is already mirroring is configuring in 2012, what are the necessary steps in Upgradation process regarding mirroring?

[navyasree]

thankyou so much, very helpful.can you please upload interview questions

[painkillerO]

Great Video! How is the application knows which available DB to connect to?