On Feb 17, 2008 10:26 PM, Janek Kozicki <janek_listy@xxxxx> wrote: > Conway S. Smith said: (by the date of Sun, 17 Feb 2008 07:45:26 -0700) > > > Well, I was reading that LVM2 had a 20%-50% performance penalty, > > huh? Make a benchmark. Do you really think that anyone would be using > it if there was any penalty bigger than 1-2% ? (random access, r/w). > > I have no idea what is the penalty, but I'm totally sure I didn't > notice it. > (Oops, replied straight to Janek, rather than the list. Sorry.) I saw those numbers in a few places, the only one I can remember off the top of my head was the Gentoo-Wiki: <http://gentoo-wiki.com/HOWTO_Gentoo_Install_on_Software_RAID_mirror_and_LVM2_on_top_of_RAID>. Looking at its history, that warning was added back on 23 Dec. 2006, so it could very well be out-of-date. Good to hear you don't notice any performance drop. I think I will try to run some benchmarks. What do you guys recommend using for benchmarking? Plain dd, bonnie++? Conway S. Smith - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
