i need some information regarding Oracle ACFS.
My plan was to use a LUN on 3 different systems with a cluster file system to share files without copying them. 2 of the systems are a setup as a RAC, the 3rd one is Single Instance with Oracle Restart and ASM. I created an ACFS volume on the LUN from the RAC servers. Both can access the ACFS. Now i want to use the LUN also on the 3rd system.
Is this possible with Oracle ACFS if the 3 system is not part of the Cluster the other 2 systems belongs to?
If yes, which steps are required to mount the filesystem on the 3rd system without crashing the already created acfs volume?
Thanks in advance
Here's how I understand it.
A distributed lock manager (DLM) of some sorts is needed for controlling read/write access to a file or volume when multiple servers are I/O'ing it.
All these servers need to "participate" in the DLM to make this happen.
For OCFS for example, the O2CB cluster service is an integral part in managing shared access to the mounted OCFS file systems. A server cannot mount and use such a file system, without participating in the O2CB interconnect that exists for managing access to these OCFS file systems.
Likewise with ACFS. In this case, the CRS/Grid Interconnect is an integral part of managing shared access. A server that is not part of the Grid, cannot use and consume Grid resources - like an ACFS file system.