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ACFS is not supported on Exadata. If a cluster filesystem is required, you may consider using DBFS or NFS. DBFS can be configured by following MOS 1054431.1.
***ACFS is not supported in Exadata but DBFS***
I presume the reason is related with rights & security.
One runs with user privileges and other with root privileges.
Nope, not privileges. ACFS requires device-level access to the storage and Exadata griddisks are viewed as network storage (so there is no device file on the host to use for accessing the storage).
Can you explain more.. what do you mean by device-level access?
ACFS requires device-level access to the storage and Exadata griddisks are viewed as network storage (so there is no device file on the host to use for accessing the storage).
Device-level access means having a device file (i.e. /dev/sdz) to address the storage. Exadata storage is not accessed via device files from the DB host and therefore cannot be used for ACFS.
Thanks for the explanation, Dan!
I get this question frequently in Oracle University Exadata courses.
But it seems like we work on it to make ACFS available for Exadata also? At least that is what this MOS Note says:
"Don't believe it, test it!"
thanks for sharing the upcoming feature.
I hadn't seen that note. It's being reviewed now and may change as a result, so stay tuned.
It appears the note has since been updated and hence there is no amibiguity on this subject
For the lazy: the note has been updated to say that there are no plans to provide ACFS support on Exadata, and recommending DBFS or NFS instead.