|[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]|
Joshua D. Drake wrote:
Good point. On another note, I am wondering why nobody's brought up the command-queuing perf benefits (yet). Is this because sata vs scsi are atSATAII has similar features.par here? I'm finding conflicting information on this -- some calling sata's ncq mostly crap, others stating the real-world results are negligible. I'm inclined to believe SCSI's pretty far ahead here but am having trouble finding recent articles on this.What I find is, a bunch of geeks sit in a room and squabble about a few percentages one way or the other. One side feels very l33t because their white paper looks like the latest swimsuit edition.Real world specs and real world performance shows that SATAII performs, very, very well. It is kind of like X86. No chip engineer that I know has ever said, X86 is elegant but guess which chip design is conquering all others in the general and enterprise marketplace?SATAII brute forces itself through some of its performance, for example 16MB write cache on each drive.
sure but for any serious usage one either wants to disable that cache(and rely on tagged command queuing or how that is called in SATAII world) or rely on the OS/raidcontroller implementing some sort of FUA/write barrier feature(which linux for example only does in pretty recent kernels)
[Postgresql General] [Postgresql PHP] [PHP Users] [PHP Home] [PHP on Windows] [Kernel Newbies] [PHP Classes] [PHP Books] [PHP Databases] [Home] [Yosemite]