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FreeBSD Mastery: Advanced ZFS (IT Mastery) (Volume 9) Paperback – April 7, 2016
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While this is the only book about ZFS at this level available anywhere, it fortunately is an excellent one. ZFS is complex. Rarely complicated, but it represents the work of many great minds addressing generations of storage-related issues. In many regards ZFS is a logical conclusion based on decades of good, bad and ugly file systems experience. ZFS generally has a very good reason for doing something the way it does and this book is here to help you navigate its most advanced strategies. From backup strategies to how to best run databases on ZFS, this book has invaluable information that is backed by hands-on validation by its authors.
Of the ten chapters, those on Replication, Caches, Performance and Tuning are critical to any production use of ZFS. ZFS replication is what allows you to have a validated storage infrastructure that not only enjoys online, production-ready backups, but can also can survive for decades across generations of different hardware. Keeping your data safe is one thing but accessing it as quickly as possible is what meets your needs. The performance chapters talk about how to speed ZFS performance with flash devices like SSDs and the tunings that suit your load. Beyond simply suggesting settings, Lucas and Jude go into what utilities, including DTrace can help you understand the performance of your storage system.
Truly complimenting the other books in the series "FreeBSD Mastery: ZFS" and "FreeBSD Mastery: Storage Essentials", FreeBSD Mastery: Advanced ZFS discusses real-world production issues like cabinet management and newer hardware devices like NVMe cards. To read and understand these three books and perhaps "FreeBSD Mastery: Specialty Filesystems" will give you a very solid basis as a personal or professional storage engineer. If you're serious, a FreeBSD system with a few disks plus these books will give you more hands-on education than any certification course could.