The Storage Architect's Amber Road Review -- Part II
By chhandomay on May 09, 2009
Hybrid Storage Pool Model for Sun Storage 7000 Unified Storage System Family
In his continuing series, Chris Evans of The Storage Architect blog took another in-depth look at the Amber Road platform. In this post, he turned his sights on the disk components of the hardware, specifically looking at the use of flash (SSD) drives and ZFS to produce a commodity storage device.
Chris began with a primer on ZFS, sharing the basic concepts and bringing the filesystem features to life and what they bring to the Amber Road platform. He also provided an overview of the Unified Storage System's cache architecture, noting the adaptive replacement cache and the ZFS intent log, and the fault tolerance and performance these features offer the 7000 series.
Chris picked up the core difference between Amber Road and traditional storage devices. "In a typical general storage array there will be LUNs presented to hosts which are very active, some moderately active and some totally inactive." He noted that Amber Road provides and alternative to the traditional "Long Tail" model, highlighting "fronting disk access with SSD ensures that high performance is dynamically provided to LUNs as it is needed."
Overall, Chris is positive about the architectural choices made for Amber Road and was unable to find fault via his evaluation. "I can say that in the testing I performed, the array coped easily with the workload I threw at it," he stated.
Chris' next post will be an in-depth look at the analytics provided by Amber Road and how it allows detailed device reporting.