SAN Volume Controller: Best Practices and Performance Guidelines
by Jon Tate, Deon George, Thorsten Hoss, Ronda Hruby, Ian MacQuarrie, Barry Mellish, Peter Mescher
Chapter 5.7.2. Segment size
Page 69
Chapter 5. Storage controller 69 workloads. A common mistake that people make when selecting array width is the tendency to focus only on the capability of a single array to perform various workloads. However, you must also consider in this decision the aggregate throughput requirements of the entire storage server. A large number of physical disks in an array can create a workload imbalance between the controllers, because only one controller of the DS4000 actively accesses a specific array. When selecting array width, you must also consider its effect on rebuild time and availability. A larger number of disks in an array increases the rebuild time for disk failures, which can have a negative effect on performance. ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access