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  #1  
Old 07-16-2009, 01:32 PM
jimmy jimmy is offline
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Default What is the difference between switchover and failover ?

What is the difference between switchover and failover ? Are these same in veritas cluster?
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Old 02-19-2010, 11:00 AM
Andrew22 Andrew22 is offline
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Default What is the difference between switchover and failover ?

Effectively in both cases standby becomes primary main difference is when failover happens it means there is something wrong at primary site in someway primary is not accessible either DB has failed or network at primary site. On other hand switchover is part of routine activity to make sure that DR is functional. Many system (where DR is setup) do switchover every 6 months. Failover is never planned it happens when major fault occurs at primary site.
Hope this help !
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Old 02-21-2010, 06:31 AM
Johny22 Johny22 is offline
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Default What is the difference between switchover and failover ?

A switchover (or graceful switchover) is a planned role reversal between the primary and the standby databases. This is used when there is a planned outage on the primary database or primary server and you do not want to have extended downtime on the primary database. The switchover allows you to switch the roles of the databases so that the standby databases now becomes a primary databases and all your users and applications can continue operations on the “new” primary database (on the standby server). During the switchover operation there is a small outage. How long the outage lasts, depends on a number of factors including the network, the number and sizes of the redo logs. The switchover operation happens on both the primary and standby database.

A failover operation is what happens when the primary database is no longer available. The failover operation only happens on the standby database. The failover operation activates the standby database and turns this into a primary database. This process cannot be reversed so the decision to failover should be carefully made. The failover process is initiated during a real disaster or severe outage.
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Old 03-05-2010, 03:37 PM
Andrew22 Andrew22 is offline
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Hello friends
Failover:
dbv_oraStartStop activate orcl1
(where orcl1 is the name of the database)

This command is run on the standby server. Now the standby database has been activated and is now the new primary database.

Switchover:
dbv_oraStartStop switchover orcl1
(where orcl1 is the name of the database)

This command is run on both the primary and standby servers. The primary database will become the standby database, and the standby database becomes the primary database. Dbvisit will continue to operate to keep the new standby database up to date from the new primary database. No configuration changes need to be made.

Hope this help
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Old 02-19-2011, 09:56 AM
claudia3bush claudia3bush is offline
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Default What is the difference between switchover and failover?

Failover:Primary fails and standby is made primary.
Switchover: Primary and secondary interchanges the role.
Switchover is part of routine activity to make sure that DR is functional while Failover is never planned, it happens when major fault occurs at primary site.
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  #6  
Old 03-21-2011, 09:18 AM
charlez charlez is offline
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For Switchover we have a scenarion which involves preplanning. The primary and standby databases are available in the case of switchover. This is a reversible process.[/COLOR]


For Failover, there is no pre-planning[/COLOR]. Thisis a disaster condition.The primary database is no longer available.This process is irreversible and must be handled carefully.



Let us have a look at the Dbvisit database:

Dbvisit and failover

Failover:

dbv_oraStartStop activate ora
(where ora stands for the name of the database)

This command is run on the standby server. Now the standby database has been activated and is now the new primary database.

Switchover:

dbv_oraStartStop switchover ora
(where ora stands for the name of the database)
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Old 03-30-2011, 07:55 AM
eilert eilert is offline
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Failover server setups usually have the services migrated over to the secondary server from the primary, when the primary server fails. This process can be made automatic or manual, as per the need.

SwitchOver server setups usually are planned service migration. The Primary and Secondary servers would be online in this case. After the switchover, the primary becomes the secondary.
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Old 01-30-2012, 07:32 AM
HostAddonLtd HostAddonLtd is offline
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Switchover – This is done when both primary and standby databases are available. It is pre-planned.

Failover – This is done when the primary database is NO longer available (ie in a Disaster). It is not pre-planned.
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Old 10-08-2012, 08:32 AM
openeshore openeshore is offline
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A switchover is used when there is a planned outage on the primary database or primary server and you do not want to have extended downtime on the primary database. A failover is when the primary database fails and one of the standby databases is transitioned to take over the primary role.
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Old 01-01-2016, 11:58 PM
Kamilla123 Kamilla123 is offline
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I think that this information is the best.
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