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Difference between Physical & Logical instances Expand / Collapse
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Posted Thursday, January 27, 2011 6:11 AM
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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
Post #1054505
Posted Thursday, January 27, 2011 6:20 AM


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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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Post #1054512
Posted Thursday, January 27, 2011 6:25 AM


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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
Post #1054516
Posted Thursday, January 27, 2011 6:50 AM
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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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Post #1054536
Posted Thursday, January 27, 2011 10:24 AM
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Or Could be a Instance on a Virtual Machine Vs Instance on a Physical Machine

Thank You,

Best Regards,
SQLBuddy
Post #1054730
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