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FreeBSD Mastery: ZFS (IT Mastery) (Volume 7), by Michael W Lucas, Allan Jude
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21st-Century Data Storage ZFS, the fast, flexible, self-healing filesystem, revolutionized data storage. Leveraging ZFS changes everything about managing FreeBSD systems. With FreeBSD Mastery: ZFS, you’ll learn to:
- Sales Rank: #343010 in Books
- Published on: 2015-05-16
- Original language: English
- Number of items: 1
- Dimensions: 9.00" h x .53" w x 6.00" l, .70 pounds
- Binding: Paperback
- 234 pages
Most helpful customer reviews
3 of 3 people found the following review helpful.
Great reference, could enhance tutorial material
By Robert M. Koretsky
This book has many useful, practical, and above all contemporary ZFS tactics and strategies in it. It is well organized, and is cogently written in a clear and conversational style. It shows the basics of applying ZFS on FreeBSD, but can also be used on systems like Solaris and OpenIndie. There is also an advanced book comming soon. I think they should have concentrated on a more tutorially-presented sequencing, and with more thoughtfully developed and interconnected examples. If the book is going to be a reference source for you, it's great. As a tutorial, it has some shortcomings, IMHO.
Just as an aside at this point, you can use the man pages on zfs and zpool, and Google for more important and useful details, tutorials, and context about ZFS than this book provides. Then again, you have to wade through a lot of extraneous material when you do that!
For instance, in Chapter 3 on zpools, they start off with using 6 hardware providers(vdevs) in a pool that they say are hard disks. The labeling of the disks as vdevs is not clear. How many people can use 6 separate hard drives on a prototype or test machine? So they develop several examples using those vdevs in multiple pools, yet they show how to destroy a pool only at the end of the chapter! To sequence all of their examples so that someone could do them in the order presented, the zpool destroy command should have been shown in the beginning of the chapter, right after the first zpool create. You cannot proceed from the zpool create on page 56 to the remaining pools in that chapter without destroying the pools as you go along. One GEOM provider per vdev, one zpool per vdev! The rule for me is one vdev mapped to one pool. When I do a basic Install of FreeBSD or PC-BSD on a whole disk, that disk as a storage provider cannot have another pool on it- the default pool tank is mapped to the whole root or system disk.
So as recommended in this book, during my initial install of the system, I could partition the hard disk into a system partition with the OS and ZFS on it, and then add other zpools on other partitons of one hard disk. Smart idea from a couple of perspectives.
Just as a footnote to this discussion, online Googled and other beginning zpool tutorial examples use files as vdevs, much more realistic for introductory work, although not recommended in practice. I have routinely used USB thumbdrives as vdevs, mirrored them and done many of the basic zfs and zpool tactics on the USB thumbdrives, on all three OS's I run.
Also, on page 24 in the Virtual Devices chapter, they say to use partitions as a storage provider. That is an interesting and contermporary performance advantage in FreeBSD and PC-BSD (not so in Solaris and OpenIndiana). They even give you a heads up that deleting vdevs from a zpool, and shrinking zpools will be included in later releases of FreeBSD (and by extension PC-BSD), and probably in Solaris and OpenIndie too. Like I said, very contemporary.
I use ZFS on both PC-BSD and Solaris, and have used it on OpenIndiana. It's pretty much the same on all three systems. My computer hardware is HP Microserver, Dell Poweredge server, and Dell Inspiron laptop. The laptop with only one hard drive in it can have zfs copies set to 2 so there is some redundancy on that single hard drive.
In summary, there should be some linear consistency or sequential development of the examples in a chapter, starting at one place with one command, and step -by -step moving to a more complex state, through related commands working on the same vdevs, pools, or datasets as you started with. I found the examples are too fragmented (if that's a good word for it), perhaps good for reference but not for a tutorial presentation.
2 of 2 people found the following review helpful.
The ultimate guide to ZFS
By Lorenzo Varela
ZFS is one of the reasons that I moved to FreeBSD from RHEL and this book is the ultimate guide to setting up and configuring ZFS. The authors give us best practices, real world examples and the best RAIDZ info available anywhere. The book is well organized and is actually fun to read, got a few laughs, even while fixing a failed zpool!
1 of 1 people found the following review helpful.
Great for New or Experienced Users of ZFS
By BamaChE
VERY informative! I am new to ZFS. This book helped me to decide and how to implement a small server using ZFS. I am still learning a lot from this and Michael W. Lucas' other books. A good companion book, for me at least, is "FreeBSD Mastery: Storage Essentials. Both books are easy to read, understand and the examples are very applicable. No matter if you are beginning to use ZFS or if you have been using ZFS for however long, in my opinion, you will learn something new with this book! This book is currently on top of my stack for reading and working out new ideas. I even have the Kindle version and I do not own a Kindle. I am grateful for the Mac OS X port and others. Highly recommended!
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