Bob Scheifler wrote:
> James C. McPherson wrote:
>> You can definitely loopback mount the same fs into multiple
>> zones, and as far as I can see you don't have the multiple-writer
>> issues that otherwise require Qfs to solve - since you're operating
>> within just one kernel instance.
> Is there any significant performance impact with loopback mounts?

Not that I have come across.

I've got three zones (global + 2 others) running permanently.
My home directory is constantly mounted on two of them, and
periodically on the third. Both the non-global zones have
several loopback-mounted filesystems in very heavy use and at
least from my point of view the performance has been quite

James C. McPherson
Senior Kernel Software Engineer, Solaris
Sun Microsystems
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