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Difference between Physical & Logical instances


Difference between Physical & Logical instances

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naveenkumar_segu
naveenkumar_segu
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Hi,

I have heard two phrases from someone "Physical & Logical instances". Can anyone please explain me what this is?

Thank you all.


Naveen
GilaMonster
GilaMonster
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No such thing as a physical or logical instance of SQL. Could be something unrelated. Why don't you ask the person that you heard it from?

Gail Shaw
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Pouliot Philippe
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Physcial or Logical exist for Oracle.

1. Physical Standby Database

Standby database is called “physical” if the physical structure of stand by exactly matches with stand by structure. Archived redo log transferred from primary database will be directly applied to the stand by database.

2. Logical Standby Database

Stand by database is called “logical”, the physical structure of both
databases do not match and from the archived redo log we create SQL statements then these statements will be applied to stand by database.

http://www.orafaq.com/node/957
george sibbald
george sibbald
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they might have a meant a 'virtual' instance, which is what a sql instance is referred to in a clustered configuration as it could reside on more than one physical node.

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sqlbuddy123
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Or Could be a Instance on a Virtual Machine Vs Instance on a Physical Machine

Thank You,

Best Regards,
SQLBuddy
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