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Oracle Solaris 11: First Look

You're reading from   Oracle Solaris 11: First Look A sneak peek at all the important new features and functionality of Oracle Solaris 11

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Product type Paperback
Published in Jan 2013
Publisher Packt
ISBN-13 9781849688307
Length 168 pages
Edition 1st Edition
Languages
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Author (1):
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Philip P. Brown Philip P. Brown
Author Profile Icon Philip P. Brown
Philip P. Brown
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Table of Contents (19) Chapters Close

Oracle Solaris 11: First Look
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
1. IPS – The Image Packaging System FREE CHAPTER 2. Solaris 11 Installation Methods 3. Sysadmin Configuration Differences 4. Networking Nuts and Bolts 5. NWAM – Networking Auto-reconfiguration 6. ZFS – Now You Can't Ignore It! 7. Zones in Solaris 11 8. Security Improvements 9. Miscellaneous IPS Package Reference
New ACL Permissions and Abbreviations
Solaris 10 Available Enhancements Index

ZFS, beadm, and zones


It should be noted that there is no longer any such thing as a "sparse" zone. Each zone has its own ZFS root filesystem, and a ZFS tree under that. They no longer share the root filesystem of the global zone, although they may have a clone of the global root filesystem. This is similar to, yet different from, the old style of sharing the /usr filesystem as read-only. The similarity resides in the fact that, if no changes are made, you only take up one zone's worth of filesystem space. The differences are rather critical however; changes made in the original are not reflected in any clones. Furthermore, the clones are writable, rather than read-only by default. However, it is possible to set a zone to have an "immutable" root. See Chapter 8, Security Improvements, for more details.

The zone-specific root filesystem is usually contained under:

$(zonepath)/rpool/ROOT

Because of this, it is also possible (and in a way, mandatory) to run beadm for zones. More details on...

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