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Don Burleson Blog 







Oracle Cloud File System Tips

Expert Oracle Database Tips by Donald BurlesonMarch 17, 2015


Question:  I hear the buzzword about 'the cloud?, and ?Oracle cloud computing?, yet it all seems like marketing vapourware.  Is Oracle really doing anything concrete in cloud computing?  I have heard about a new Oracle cloud Filesystem, is this ?OCF? real?  Cheers!  

Answer:  The sharing of computing resources has been around since the 1970's, and the concept of cloud computing is as old as your Grandma's drawers. However, you are correct, Oracle has introduced a new Oracle Cloud Filesystem (OCF) as part of their cloud computing initiative.  

The Oracle ?cloud filesystem? is a bit of hype. It is simply the new name for the device media control language (DMCL) between the logical tablespaces seen by the applications, the exact same transparency layer we saw in the IDMS CODASYL database of the early 1980's.  This same technology was used in standard cluster file systems used by early OPS and RAC databases.   

The Oracle cloud filesystem is a fancy name for the ASM components (ASMCMD, ASM CFS and ASM DVM) and the underlying ASM disk groups.  

Oracle has renamed these existing ASM components first introduced in Oracle 11g release 2 as part of the Oracle cloud filesystem:

In sum, the Oracle Cloud Filesystem is indeed a buzzword, but it truly describes a collection of ASM tools that separate the logical tablespaces from the physical data files.

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