Sharing a physical disk with an LDOM Post: 303042254

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Operating Systems Solaris Sharing a physical disk with an LDOM Post 303042254 by Michele31416 on Thursday 19th of December 2019 05:17:31 PM

12-19-2019

Registered User

OK, I'm glad I asked then. So I have to mount the /bkpool disk in the LDOM as an NFS share? Can you give me a pointer on how to do that? Is this what Oracle calls "virtual disk multipathing"? There's an example of that further down in the link in the OP but I'm not quite sure how to do it. Also, do I first need to undo the add-vdsdev and add-vdisk commands I gave earlier? I don't want to mess up my disk.

UPDATE

Well as usual the Oracle documentation was overly complex and ambiguous. I figured it out, thanks to the suggestion above:

On the host, assuming the IP of the LDOM at 192.168.0.78, do:

Code:

root@hemlock:/# share -F nfs -o rw,root=192.168.0.78 /bkpool/

Then in the LDOM (with the IP of the host hemlock at 192.168.0.183), do:

Code:

# cd /
# mkdir bkpool
# mount -F nfs -o vers=3 192.168.0.183:/bkpool /bkpool

The LDOM now has a mountpoint named /bkpool containing everything on the host's /bkpool disk. The host and the LDOM can both read and write the disk. No rebooting anywhere required. Easy! :-)

Last edited by Michele31416; 12-19-2019 at 09:13 PM..

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LEARN ABOUT NETBSD

viomb

VIOMB(4)						   BSD Kernel Interfaces Manual 						  VIOMB(4)

NAME

     viomb -- VirtIO memory ballooning driver

SYNOPSIS

     virtio* at pci? dev ? function ?
     viomb*  at virtio?

DESCRIPTION

     virtio(4) defines an interface for efficient, standard, and extensible I/O between the hypervisor and the virtual machine.  The viomb driver
     supports the virtio-compliant memory ballooning device.

     Memory ballooning works as follows:

     1.   The host operator requests a guest to return some amount of memory to the host (via e.g. Qemu monitor balloon command).
     2.   The hypervisor sends the request via VirtIO memory ballooning device.
     3.   The guest viomb driver requests allocation of that amount of physical memory from the NetBSD memory management system.
     4.   The viomb device tells the hypervisor the guest physical memory address of the allocated memory via VirtIO memory ballooning device.

     The sysctl node hw.viomb.npages shows the requested number of memory pages to return to the hypervisor, while hw.viomb.actual shows the
     actual number of memory pages that are already returned to the hypervisor.

SEE ALSO

     virtio(4), sysctl(8)

     Rusty Russell, IBM Corporation, Virtio PCI Card Specification, http://ozlabs.org/~rusty/virtio-spec/.

HISTORY

     The viomb device driver appeared in NetBSD 6.0.

BUGS

     The userland interface should be same as the Xen ballooning device.

BSD
								 November 26, 2011							       BSD