--- On Wed, 16/9/09, Majed B. <majedb@xxxxxxxxx> wrote: > From: Majed B. <majedb@xxxxxxxxx> > Subject: Re: LVM and Raid5 > To: "Goswin von Brederlow" <goswin-v-b@xxxxxx> > Cc: "Linux Raid Study" <linuxraid.study@xxxxxxxxx>, linux-raid@xxxxxxxxxxxxxxx > Date: Wednesday, 16 September, 2009, 11:20 AM > Hello, > > I'm the one who ran those tests with LVM vs. RAID5 and I > think I have > faced speed difference because I have disks of varying > speeds > (different models and vendors), and I believe that LVM gets > crippled > down to the speed of the slowest disk. > > On Wed, Sep 16, 2009 at 1:09 PM, Goswin von Brederlow > <goswin-v-b@xxxxxx> > wrote: > > Linux Raid Study <linuxraid.study@xxxxxxxxx> > writes: > > > >> Hello: > >> > >> Has someone experimented with LVM and Raid5 > together (on say, 2.6.27)? > >> Is there any performance drop if LVM/Raid5 are > combined vs Raid5 alone? > >> > >> Thanks for your inputs! > > > > Has always worked perfectly for me and i can't say I > noticed any > > performance change. > > > > MfG > > Goswin > > -- > > 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 > > > > > > -- > Majed B. > -- Is that the case even if a dd read from say md4 is much, much faster that he lvm's that are based on md4? Surely if the read from the underlying md is faster so should the LV's? ----------------------- N: Jon Hardcastle E: Jon@xxxxxxxxxxxxxxx 'Do not worry about tomorrow, for tomorrow will bring worries of its own.' ----------------------- -- 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
