It seems like every other startup I talk to is pitching VMware-integrated caching, and a spate of acquisitions and announcements from flash companies are legitimizing the idea. Even VMware has gotten in on the game with vFlash Read Cache (vFRC). But integrating caching with VMware vSphere isn't nearly as easy and effective as everyone is making it sound! A Whole Datacenter Of … [Read more...] about VMware-Integrated Caching? Not So Fast!
Why do some data storage solutions perform better than others? What tradeoffs are made for economy and how do they affect the system as a whole? These questions can be puzzling, but there are core truths that are difficult to avoid. Mechanical disk drives can only move a certain amount of data. RAM caching can improve performance, but only until it runs out. I/O channels can be … [Read more...] about The Four Horsemen of Storage System Performance: Never Enough Cache