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What is /dev/mapper in layman's terms ?

C. BoutetAug 9 2012 — edited Aug 10 2012

GI Version: 11.2.0.3 on RHEL 6 (still planning )

I have only worked in Solaris and AIX before. Our management has decided to do all new RAC implementations in OEL or RHEL.

Solaris is robust and easy to maintain !

Our storage team allocae LUNs based on WWN (sort of MAC address for our HBA cards in the Solaris server) and all shared LUNs are visible at /dev/rdsk location from both of our nodes (2-Node RAC)

I gather that in Linux, it is visible at /dev. I come across scary terms like +/dev/mapper+ , multipathing quite frequently with regards ASM for RAC.

What is /dev/mapper from a 'Solaris DBA' point of view ?

What is multipathing ?

This post has been answered by Billy Verreynne on Aug 10 2012

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Added on Aug 9 2012

#performance-availability, #real-application-clusters

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