February 17, 2011 at 4:45 am
Dear All,
Can someone clear out my doubts here?please
What is the meaning of Cold standby,Warm standby & Hot standby solutions ?
NOTE:Please provide me the examples for each of one.
Thanks in advance.
Regards,
Ravi.
February 17, 2011 at 6:36 am
Hot standby is a server that will automaticaly failover if the primary server fails. You can get this using synchronous mirroring + witness (not sure if a cluster can be called a hot standby).
Warm standby is a server that will not automaticaly failover and that may not have all the latest transactions. You can get it by using log shipping or asynch mirroring.
Cold standby is just a spare machine that needs to be turned on, backup restored (or even full staging of the machine).
February 17, 2011 at 11:29 pm
Thanks for you reply !!
Regards,
Ravichandra.
February 18, 2011 at 2:51 am
Oliiii (2/17/2011)
Hot standby is a server that will automaticaly failover if the primary server fails. You can get this using synchronous mirroring + witness (not sure if a cluster can be called a hot standby).Warm standby is a server that will not automaticaly failover and that may not have all the latest transactions. You can get it by using log shipping or asynch mirroring.
Cold standby is just a spare machine that needs to be turned on, backup restored (or even full staging of the machine).
I would call a cluster a "hot standby". Anything high availability model which "should" require no intervention in the event of failure would a hot standby.
Mirroring with a witness is a hot standyby. Mirroring without a witness is a warm standby.
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