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SQL Server 2005
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Cold standby,Warm standby & Hot standby...
Cold standby,Warm standby & Hot standby solutions
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ravisamigo
ravisamigo
Posted Thursday, February 17, 2011 4:45 AM
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Last Login: Monday, June 10, 2013 6:11 PM
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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.
Post #1065553
Oliiii
Oliiii
Posted Thursday, February 17, 2011 6:36 AM
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Last Login: Friday, June 14, 2013 5:58 AM
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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).
Post #1065614
ravisamigo
ravisamigo
Posted Thursday, February 17, 2011 11:29 PM
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Last Login: Monday, June 10, 2013 6:11 PM
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Thanks for you reply !!
Regards,
Ravichandra.
Post #1066155
MysteryJimbo
MysteryJimbo
Posted Friday, February 18, 2011 2:51 AM
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Last Login: Yesterday @ 2:25 AM
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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.
Post #1066223
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