I am not sure if this question was already asked or not, but can you please
me or point me to links where I can find what are the benefits or problems to
have Sparse vs. Whole Root Zones?
Here is what I have so far, please correct me if I'm wron on any of them.
Whole Root Zones
* Each zone is assigned its own root file system and cannot see that of others
* A zone can be created as a whole-rootzone
> The zone gets its own writable copy of all Solaris file systems
* Advantages of a whole root zone
> installation of software such as WebSphere MQ v6.0 is easily acomplished
since MQ must be installed into an environment where /opt and /usr are writable.
> The default file system configuration is called a sparse-rootzone
> The zone contains its own writable /etc, /var, /proc, /dev
> Inherited file systems (/usr, /lib, /platform, /sbin) are read-only mounted
via a loopback file system (LOFS)
> /opt is a good candidate for inheriting
* Advantages of a sparse root zone
> Faster patching and installation due to inheritance of /usr and /lib
> Read-only access prevents trojan horse attacks against other zones
> Libraries shared across all zones reducing VM footprint
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