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Full Discussion: How to share/mount ZFS in two non-global zones?
Operating Systems Solaris How to share/mount ZFS in two non-global zones? Post 302466254 by jlliagre on Tuesday 26th of October 2010 04:23:56 AM
Old 10-26-2010
Quote:
Originally Posted by blicki
However, using LOFS to share one dataset into two local zones can be risky as hell, if both zones work on same data (read-write)
This doesn't make sense. Having multiple processes accessing the same file in r/w mode might be risky regardless of whether the file system is local or not and regardless of the accessing processes running on the same kernel or not. You can lofs mount in read-only mode should you want to avoid that specific issue. On the other hand, it is extremely common to have NFS, cifs or lofs shares in r/w mode and this definitely serves a purpose. File locking is the usual way to avoid multiple processes concurrently accessing the same file.
Quote:
Therefore I would use second opinion only.
You really shouldn't. This is not supported (see NOTES in the mount_nfs manual page). It is well know to create kernel deadlocks, which are much "riskier as hell" than the previous solution you discarded.

Bug ID: 6811806 automounter should prevent zone-to-global-zone mounts
 

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LEARN ABOUT FREEBSD

uefi

UEFI(8) 						    BSD System Manager's Manual 						   UEFI(8)

NAME

     UEFI -- Unified Extensible Firmware Interface bootstrapping procedures

DESCRIPTION

     The UEFI Unified Extensible Firmware Interface provides boot- and run-time services to operating systems.	UEFI is a replacement for the
     legacy BIOS on the i386 and amd64 CPU architectures, and is also used on arm64 and ia64.

     The UEFI boot process loads system bootstrap code located in an EFI System Partition (ESP).  The ESP is a GPT or MBR partition with a spe-
     cific identifier that contains an msdosfs(5) FAT file system with a specified file hierarchy.

	   Partition Scheme    ESP Identifier
	   GPT		       C12A7328-F81F-11D2-BA4B-00A0C93EC93B
	   MBR		       0xEF

     The UEFI boot process proceeds as follows:
	   1.	UEFI firmware runs at power up and searches for an OS loader in the EFI system partition.  The path to the loader may be set by an
		EFI environment variable.  If not set, the default is /EFI/BOOT/BOOTX64.EFI.  The default UEFI boot configuration for FreeBSD
		installs boot1.efi as /EFI/BOOT/BOOTX64.EFI.
	   2.	boot1.efi locates the first partition with the type freebsd-ufs, and from it loads loader.efi.
	   3.	loader.efi loads and boots the kernel, as described in loader(8).

     The vt(4) system console is automatically selected when booting via UEFI.

FILES

     /boot/boot1.efi
		   First stage UEFI bootstrap
     /boot/boot1.efifat
		   msdosfs(5) FAT file system image containing boot1.efi for use by bsdinstall(8) and the bootcode argument to gpart(8).
     /boot/loader.efi
		   Final stage bootstrap
     /boot/kernel/kernel
		   default kernel
     /boot/kernel.old/kernel
		   typical non-default kernel (optional)

SEE ALSO

     vt(4), msdosfs(5), boot(8), gpart(8)

HISTORY

     UEFI boot support first appeared in FreeBSD 10.1.

AUTHORS

     UEFI boot support was developed by Benno Rice <benno@FreeBSD.org>, Ed Maste <emaste@FreeBSD.org>, and Nathan Whitehorn
     <nwhitehorn@FreeBSD.org>.	The FreeBSD Foundation sponsored portions of the work.

CAVEATS

     EFI environment variables are not supported by loader(8) or the kernel.

     boot1.efi loads loader.efi from the first FreeBSD-UFS file system it locates, even if it is on a different disk.

     boot1.efi cannot load loader.efi from a ZFS(8) file system.  As a result, UEFI does not support a typical root file system on ZFS configura-
     tion.

BSD
								 October 17, 2014							       BSD
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