April 2018
Intermediate to advanced
508 pages
15h 22m
English
Content preview from PostgreSQL 10 High Performance - Third Edition
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ZFS
Few filesystems have ever inspired the sort of zealous advocacy fans of ZFS regularly display. While it has its weak points, in many respects, ZFS is a reinvention of the filesystem concept with significant advantages. One thing that's different about ZFS is that it combines filesystem and RAID capabilities into an integrated pair. The RAID-Z implementation in ZFS is a worthwhile alternative to standard RAID 5 and RAID 6 installations.
ZFS defaults to working in records of 128 KB in size. This is much larger than a PostgreSQL block, which can cause a variety of inefficiencies if your system is regularly reading or writing only small portions of the database at a time (like many online transaction processing (OLTP) systems do). It's only ...
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